I. INTRODUCTION For a long time, PLC has always been the main battlefield in the field of industrial automation control, providing a very reliable control application for a variety of automated control equipment. The main reason is that it can provide safe and reliable and relatively complete solutions for automation control applications, which is suitable for the current industrial enterprises' needs for automation. On the other hand, PLC must also rely on other new technologies to face the impact of the shrinking market share, especially the impact of industrial PCs. The problem that PLC needs to solve is still the adoption of new technology, system openness and price.
The final trend of PLC technology exhibition is still one of the focuses of people's debate. Most people think that PLC will continue to lose market share; what is even worse is that in the face of industrial PCs, PLC will go to death step by step; but some people believe that some special industrial applications will still provide certain market share.
In the field of global industrial computer control, great changes have taken place around open and re-open process control systems, open process control software, and open data communication protocols. PLCs are almost everywhere, but this trend may not continue. With the birth and further improvement and development of SoftPLC control configuration software technology, the market share with SoftPLC configuration software and industrial PC control system is gradually increasing. These facts make the traditional PLC suppliers ideologically Dramatic changes have taken place. They must face reality and make a more open and high profile in the development and improvement of traditional PLC technology. For the control software, this is the core of the PLC controller. The PLC supplier is providing open-end programming configuration tool software to industrial users, and it is very active for industrial users. In addition, open communication network technology has also been a breakthrough, the result is to integrate PLC into a more open industrial control industry.
Second, open and based on industrial PC control
PLC manufacturers have begun to watch the impact of industrial PC-based control technology. Some experts even believe that the new technology and open technical specifications brought by the new business activities will bury traditional PLCs. PLC manufacturers believe that although there are a large number of PLC control devices installed on the industrial site, they still need to work with industrial control software companies in order to develop their own industrial PC-based process control software.
It is true that several years ago there was a clear mixture of old and new PLCs in industrial sites. Industrial users had to learn new and old knowledge at the same time, and even learn from each other. Most PLC manufacturers provide only soft logic and an operating platform for industrial users.
In the high-end applications, it is difficult to further distinguish between the PLC control system and the industrial PC control system, because both use the same type of microprocessor and memory chip. Imagery metaphorically, if you forget the literal meanings of industrial PCs and PLCs, then what you can observe in the box is just some basic computer hardware technology. What we observe more is the complexity of those basic technologies. Chemicals and hybrids, these technologies are effectively combined into the control system.
In addition, the reason for adopting open control is the need for system function integration on the one hand, and on the other hand due to the over demanding function of some industrial users. If you can give a high degree of attention, you can get more basic technical knowledge. PLC manufacturers focus on system functionality while industrial users focus on system applications. People can see that the future development trend is to further integrate more functions into a control box. Therefore, events such as sequence control and process control will be handled in a functional manner. Others such as motion control can also be shared in the same control structure system.
It is believed that PLC technology will continue to shift toward open control systems, especially industrial PC-based control systems. The latter in addition to the flexibility in the traditional PLC has a distinctly different advantages, but also has other advantages, such as can shorten the system into the market cycle, reduce system investment costs, improve the efficiency of the data flow from the bottom of the factory to the office automation Wait.
The problem of real-time response to industrial PC control systems has been well resolved. Perhaps the main thing is still hidden behind the technology, but it lacks corresponding tracking records. For PLCs, sturdiness is one of its main features, and there are already quite a number of tracking records to verify. Industrial users still treat the PLC with great care, and they are doing different technical tests on the PLC. When using a new technology, the question that industrial users need to consider is how much risk they have to take, and at the same time it needs to consider how many opportunities and benefits they can bring to their business activities.
However, industrial users do not fully believe the benefits of open control systems. With the further development of technology, they began to dilute these ideas. Industrial users are balancing the risks of adopting new technologies and the benefits of their business activities in order to provide effective protection for future decisions.
Industrial PC technology offers many features that enhance the PLC's features, including built-in video and high-speed floating-point digital coprocessors. Although Microsoft has no plans to further enhance this feature, the new Windows CE 3.0 is fully able to better meet the needs of process control.
Not long ago, Siemens announced a new set of software products based on open control systems, namely version 3.0 of SIMATIC WinAC (Windows Automation Center). WinAC is a control system solution based on Windows NT that is compatible with SIMATIC S7 PLCs and suitable for industrial PCs. WinAC 3.0 offers the connectivity of Profibus fieldbus LANs with higher integration and remote programming. In addition, it provides a new DeviceNet I/O device driver for localized integration of field control devices for connecting to installed DeviceNet I/O devices.
Steeplechase Software has also introduced an embedded Windows NT operating system interface component that supports hard real-time process control. This component further integrates hard real-time control software from Steeplechase's Industrial Compact PCI with SBS technology running in the Windows NT environment. Steeplechase's visual logic controller has now been upgraded to version 5.0. The controller is suitable for Windows NT 4.0 and Windows 2000 operating systems, its real-time engine can be directly integrated with the ordinary Ethernet and TCP/IP. The 5.0 version of the controller utilizes an enhanced OPC server driver and therefore runs faster than previous versions. Other features include new OI network features and the ability to allow industrial users to design rich and colorful dynamic graphics.
Transysoft recently introduced a new version of the ISaGRAF series industrial control configuration package, ISaGRAF PRO, which is a soft logic automation control package based on the IEC 61131-3 international standard and independent of any hardware platform. In a networked process control system environment, the software package can be applied to the development of a variety of configuration and distributed control systems. It contains a set of development tools, application work platforms, and corresponding "virtual machine" runtimes. aims. This runtime target can run on a variety of hardware platforms.
CTC Automation Engineering has released a new set of control software, MachineLogic PCLC (Industrial PC Logic Controller), which allows industrial PCs to play the role of PLC and still maintain the functional characteristics of industrial PCs. The software can complete the control tasks determined by a PLC and is as fast as the program execution time, all within 1 ms. It can also handle multi-task work at the same time, but it cannot exceed 16 control tasks at the same time. A mechanism with a prioritized and multitasking kernel keeps track of each control task, ensuring that control tasks get the highest priority. The software can run all five IEC 61131-3 standard programming languages ​​and PID control programs, supporting two types of I/O control devices. One is fieldbus I/O devices like Profibus and DeviceNet; the other is industrial PC I/O modules like ISA and PC/104. In addition, the software also provides online editing configuration functions for the control system. The program can be developed and run under Windows 95/98 and Windows NT, but it can also be executed under RTXDOS.
SoftPLC also provides Tealware, an industrial control software product that has been vividly described as a PLC wearing an industrial PC suit. The control systems installed on the rack already have the form factor of a small PLC, but SoftPLC's control software has been embedded in the CPU. Tealware software can meet the needs of various types of industrial users, from small, stand-alone systems to large, distributed multi-control workstation applications. Features include a full range of I/O modules, built-in Ethernet, and industrial serial communication interfaces.
Recently, Tealware software has been upgraded to version 2.3. Among them, the control software provides a virtually infinite ladder logic control step, allowing more than one million words of data tables; many OI/SCADA application interfaces; built-in Java engine and FTP server for remote maintenance and management; support User-written C, C++, Java programs, and device drivers; suitable for embedded Web servers; online operation of program design; robust I/O module support capabilities and many other standard PLC functions; Or, the converted AB company's PLC-5, PLC-2/PLC, PLC-3 and SLC-500 programs.
Third, the expansion of Ethernet and further accommodate Web technology
Currently, one of the biggest trends in all process control areas is the expansion of Ethernet technology. The PLC is an exception. Now, more and more PLC suppliers are beginning to provide Ethernet interface components. In the last few years, we have seen that it is a trend to develop a PLC that is more powerful than the existing ordinary XiaoLing PLC. Will Ethernet be the communication standard for PLC? Perhaps the end result is this, but it is still too early. There is a common misconception that providing an Ethernet interface on a PLC will solve all communication problems. Ethernet only defines several layers of protocol standards at the bottom of the OSI reference model. If the upper layer protocols are incompatible with each other, it is still impossible to communicate with each other. For example, this is just like a conversation between a Chinese who does not understand English and an American who does not understand Chinese is not able to make a phone conversation. Therefore, the protocol is the language that the devices communicate with each other.
On the other hand, the pace of progress has already been taken. We only have to face difficulties. In order to apply Ethernet technology to plant floor process control equipment, the ODVA Association has established a set of global standard technical specifications. Ethernet/IP standards to be able to solve the difficulties encountered in the actual work.
One of the things that is close to Ethernet is to be able to connect anywhere you want via the Internet. In fact, in some unexpected places, Web servers are showing their power. A few years ago, some PLC systems had built-in Web servers, which undoubtedly added more features to the PLC system. Other types of control devices are also preparing for further integration with Web servers. For example, Square D Company already has an engine control center with an Ethernet connection interface and is preparing to develop a transmission device with a Web server connection interface.
Benefits of having a built-in Web server body include open networks, business tools, and client/server relationships. In the past, industrial users may have typically asked for some information about PLCs, but now, due to the constant birth and development of new technologies, it is easy for industrial users to get information about this. On the other hand, with the large-scale production of chips and processors, PLC manufacturers can produce and provide open-network products, allowing industrial users to purchase PLC products with excellent functions at a small cost.
Schneider has become one of the pioneers in providing technical support for connecting PLCs to Ethernet and the Web. Recently, the company introduced a new fast Ethernet (100 Mb/s) module that runs on the Premium PLC platform. This module provides a full-duplex auto-sensing 10/100 Mb/s connection speed for PLCs that can connect to TCP/IP. The live process controllers can share real-time data information and automatically scan Momentum I/O modules. Any other field control device based on the Modbus communication protocol uses an embedded Web server to provide HTML communication services while providing SNMP for standard network communication management. At an exhibition, Schneider also showed industrial users their concept of a transparent factory.
In addition, Schneider recently introduced adapters based on Modicon's Momentum MIE family of processors that provide standard IEC program control capabilities, further providing a perfect solution for e-manufacturing. The adapter also provides the ability to connect intelligent I/O systems and other on-site process control devices to the Internet and Ethernet. On-site process control devices include all functional real-time process controllers.
A few years ago, Rockwell Automation also provided Ethernet interfaces in its PLC products and was steadily steadily improving the features of the Ethernet. The company has recently announced a flexible I/O module solution that uses non-patented versions of Ethernet technology to provide real-time process control performance. Type 1756 ControlLogix I/O from AB is also a component based on the standard Ethernet TCP/IP and UDP data transfer protocols. The application layer uses an open, object-oriented, producer/consumer-based technology. This technology can also be found in the ControlNet, DeviceNet and FF fieldbus H1 network systems.
Similarly, many other companies have also introduced Ethernet communication interface modules. For example, the communication interface provided by IDEC's OpenNet PLC controller enables compatibility with fieldbus devices such as DeviceNet, LonWorks, and Interbus. The controller utilizes an Interbus remote I/O master card that can handle no more than 480 local I/Os and 512 remote digital I/Os.
The 8051 industrial communications bridge provided by Sierra provides a good integration of PLC, DCS, RTU and SCADA systems that are incompatible with each other. This industrial communication bridge enables high-speed network applications over RS-232, 422, 485, or Ethernet communication links. The bridge controller provides eight RS-232 serial communication interfaces, two RS-485/422 isolated serial communication interfaces, two 10Base-T Ethernet interfaces, and one connection for redundant hot standby bridges Device.
The multi-vendor interface kit from ProSoft provides serial communication capabilities for AB's PLC, SLC, ControlLogix, and FLEX I/O (including the 1771, 1746, 1765, and 1794) platforms. Each module contains an 80386 processor and is embedded with a DOS operating system. Therefore, it can be considered as an industrial PC with I/O capability. In addition, the controller also has an "A>" disk operation prompt. , as well as the Autoexec.bat and Config.sys files. Applications can range from simple ASCII communications to sophisticated 32-bit control algorithms.
Another company, Giddings & Lewis, who is usually involved in motion control research, has also added Ethernet TCP/IP interfaces to its line of motion control products for the PiC (Programmable Industrial Control) and MMC (Mechanical and Motion Control) series. These unit components provide the ability to connect to the factory's internal Intranet and the Internet, allowing data information to be shared between on-site process controllers. Between on-site process controllers and industrial PCs, OPC server device drivers are usually used to connect real-time data information, and Ethernet network systems and Web technologies can be used for remote file transfer, program design, and system maintenance.
Nowadays, more and more companies are planning to gradually connect all their automation control devices to enterprise-wide information systems. For industrial users, perhaps they have noticed the Ethernet for Control series of control solutions, the technology is more dependent on Ethernet and the Internet. Almost all PLC vendors provide Ethernet connectivity in some of their serialized products, and some companies have already decided to completely embed Web servers inside their devices in order to fully demonstrate the performance characteristics of the PLC. Utilizing the Web connection feature of PLC, industrial users can not only monitor the operation status of the control system from anywhere, but also obtain any required data information just like the system manual.
Of course, if industrial users are starting to connect their control systems to the Internet, a secure information release address must be set up for this purpose. In addition, in order to prevent hackers from entering the control system, a set of firewall software with good security performance must also be installed.
SoftPLC has invested a great deal of enthusiasm and interest in network security. They have embedded a real-time and deterministic Java virtual machine into the process controller. Java makes it possible not only to run Web-based Active X control objects, but also to run Servlets. Servlets are highly integrated Web server tasks that provide dynamic Web page content. Servlets program code is clearly visible, object-oriented design, modularization, development is very simple and clear, Servlets also provide data information security performance, allowing further restrictions on real-time data information, such as only selected industrial users, or selected Registered data information. If the process controller is effectively connected to the Internet, then security is very important to it.
Hacking is not the only annoyance. If the network system is paralyzed, what do we need to do first? Hacking solutions use redundancy. Redundant IP addresses, redundant network systems, redundant communication cables, and hot backups are used in the process controller to provide good service for the process control system when an emergency occurs.
Many PLC suppliers continue to improve and improve communication performance during the development of their products. Their development direction is mainly oriented to Ethernet technology and Web-based technology.
Omron provides full Ethernet connectivity in its products. With its TCP/IP data transfer protocol, its products are fully compatible with all Ethernet specifications. In addition, the company recently released several new products based on Profibus-DP. The CS1 controller platform provides the operating characteristics of the main unit components to allow all process controller devices on the Profibus-DP network to run on the production platform; a new set of Sycon-DP configuration tool packages is also provided. Allows industrial users to easily configure the process control system and delegate the management of the network; in addition, a new multi-I/O terminal can be used as a Profibus-DP slave unit, which provides an interface for communication units. For connecting one or more I/O module units, there are Ethernet specifications. In addition, the company recently released several new products based on Profibus-DP. The CS1 controller platform provides the operating characteristics of all process controller devices on the Profibus-DP network that the master unit components allow to establish on the platform; it also provides a new set of Sycon-DP configuration tool packages. Allows industrial users to easily configure the process control system and delegate the management of the network; in addition, a new multi-I/O terminal can be used as a Profibus-DP slave unit, which provides an interface for communication units. Connecting one or more I/O module units works well with the company's C200H series PLCs.
Rockwell Automation also actively adds support for Ethernet connectivity in its products, including the Ethernet/IP, FLEX I/O, MicroLogix, and PanelView family of products specifically for ControlLogix. Similar products include ProcessLogix, PLC, and SLC 500 process controller families. Through further improvement and improvement, its products can simultaneously support the transmission of both implicit and explicit data information. With the help of implicit data information transmission methods, its data fields only contain real-time I/O data information.
The ControlLogix Ethernet/IP lineup includes an Ethernet/IP bridge module, an Ethernet/IP communication interface module, RSLinx software packages, and an Ethernet/IP communications interface transceiver. The FLEX I/O network interface module is suitable for Ethernet/IP, including a 10/100 Mb/s Ethernet/IP, including a 10/100 Mb/s Ethernet/IP fiber adapter. For MicroLogix, CompactLogix, SLC500 process controllers and other process control devices utilizing the DF1 protocol, the 1761-NET ENI Ethernet interface is supported for explicit data information transfer.
Automationdirect.com has introduced a new Ethernet Remote Master Module (H2-ERM) for its D2-240 and D2-250 PLCs. This new module connects the local CPU base unit to the remote slave I/O subsystem via a high speed Ethernet link. Each module can support 16 additional DL205 module units, 16 terminator I/O subsystems, 4 fully extended DL405 subsystems, or a mixture of any of these three types. Subsystems connected using Category 5 UTP cables must not exceed 100m between them. Repeaters can be used to extend the transmission distance and the number of nodes. If optical fiber transmission media is used, the distance can reach 2000m.
Advantech recently introduced the WebLink 2040/SDA product, which embeds Web server software that allows any machine, process controller, and smart sensor to be connected to the Internet or Intranet with Web-based HMI-SCADA software. The product also allows industrial users to securely access real-time data information from anywhere in the world via the Internet to monitor and control any on-site process equipment or system. In addition, through the company's Advantech Studio suite of software, industrial users can convert real-time, live graphics, trend records, alarm logs, reports, and recipes to a standard browser, anytime, anywhere.
Another type of Web server module from Newport Inc. is iServer, which makes it possible to connect existing PLCs and other control devices to the Internet. This DIN rack-mounted modular unit allows no more than 32 control devices with serial communication interfaces to connect to Ethernet and the Internet, acting as a Web server and an RS-232, 422, 485-compatible Ethernet serial bridge.
However, not all PLC communication performance improvements are for Ethernet or Internet. Not long ago, Rockwell Automation announced a new version for ControlNet and applies to AB's PLC-5C field controllers and SLC 500 adapter modules. The deterministic and nondeterministic network connectivity features provided by the 1747-ACN15 and 1747-ACNR15 adapter modules for SLC (1746) I/O are now fully compatible with their PLC-5C field controllers.
Moeller Electronics previously used a proprietary communications protocol and has now begun to move toward open network protocols. Their new generation of I/O structure called XI/ON will become an integral part of its PLC development. With this architecture, fragment and modular design work is possible. The integrated gateway allows connection to Ethernet, Profibus-DP, DeviceNet, CANOpen, and more network systems.
The enhancement of PLC-related communication performance is not only reflected in hardware but also fully reflected in software. For example, KEPware Corp. has introduced a new generation of 32-bit Control-Logix Ethernet OPC server drivers for its KEPserverEX family of products. The OPC driver software improves the speed and connectivity between OPC and DDE customers and AB's ControlLogix field controllers; it also provides a flexible human-machine interface; you can freely use AB's OPC server suite. It also includes the PLC5/SLC505 Ethernet driver. It also further optimized the 1756's ENET interface, improved communication performance, and supported the company's automated identifier database.
Fourth, process control applications
Although traditional PLCs have been applied in the field of discrete process control, PLCs have been widely used in the field of continuous process control, and the development trend based on continuous process control technology is further growing. Communication is a key technology for PLC applications. This technology has been expanded in the PLC field. As with systems, decentralized processing of PLCs has become possible, so it is easier to manage them so that they can be better integrated.
Facing the enormous competitive pressures existing in the traditional industrial process control market, many PLC suppliers are beginning to actively transfer the process control applications they serve, and must abandon some of the market share that traditional PLC applications already occupy.
After a short period of hard work, Siemens rolled out its PLC products based on process control, introduced SIMATIC PCS products before 1990, and upgraded their products to PCS in 1997. This development work has continued We are satisfied with Siemens, but with the constant birth and development of various new technologies, the development work will not stop. Although both discrete and continuous process control applications use the same hardware products and network systems, additional special modules may be needed, but there are always some differences between them. As long as different types of application software are loaded into the same system, different process control applications can be completed.
Any PLC supplier will continue to concentrate on the research and development of batch and hybrid process control. As a good example, Schneider Automation just brought us its QPC (Quantum Process Control) product, which enables a control system to be truly fully targeted in the field of process control. QPC uses a networked distributed PLC system to complete process control applications. Based entirely on Quantum PLCs and Momentum I/O operating platforms, QPC can scale from a single Quantum PLC to a distributed system and can also be fully integrated with Ethernet, Internet, and TCP/IP technologies.
Rockwell Automation plans to further enhance the process control performance of AB's ControlLogix multifunction controller while adding a redundant set of solutions and flow meter modules. Its 1756-CFM configurable flow meter module will provide the ability to support two channel 0-120 kHz frequency inputs and accept input signals from most turbine or mass flow meters. In version 6.0 of RSLogix 5000, both the function block diagram (FBD) and the process control instruction table will be provided. Its ControlLogix platform also integrates RSView's visual HMI software components. In ControlLogix, ActiveX panel display controls work with process control instruction tables and provide the perfect picture display for process control applications based on RSView. In addition, its RS series batch control applications also provide integrated S88 batch processing capabilities.
Toshiba Corporation has released its V-Series integrated process controller that can further integrate PLC systems, DCS, and work to control computers. Its main features include: providing a common set of configuration engineer toolkits for all three operating platform modes; providing a common backplane bus architecture for any combination of sequence controllers, loop controllers, and computer modules; Provides a common identifier database for global process variables and Windows NT 4.0; also provides a common set of Ethernet-based LAN network systems. The controller programming language is compatible with the IEC 61131-3 standard. Its Web connectivity capabilities help industrial users remotely configure, find and repair faults and other engineering activities.
The Siemens PLS 7 process control system was originally based on the SIMATIC S7-400 PLC and has recently been upgraded to version 5.0. One of its greatest features is a flexible distributed server/multi-client architecture that perfectly combines open bus architectures. Communication protocols based on Profibus and HART fieldbus are widely used for field control device integration; Profibus fieldbus, industrial Ethernet, TCP/IP are used for system bus; Ethernet TCP/IP and Fast Ethernet are used for terminal bus and enterprise integration Connection.
Similarly, Rockwell Automation has also introduced an enhanced ProcessLogix decentralized control system. Subsequently, it announced its FlexLogix decentralized control system, which contains the 5430 FlexLogix controller and existing Flex I/O control equipment products. The Model 5430 controller and AB's ControlLogix multifunction controller use the same process control software package RSLogix 5000 as Rockwell Automation.
Rockwell Automation's ControlLogix 5550 multifunction controller has added 3 new instructions to meet the needs of motion control, and has also added two new coordinate types. By allowing RSLinx software to receive all identifier data lists with a single request command, network data throughput is greatly improved. In addition, the OI tool now has a graphical interface that allows for the monitoring of trend chart and histogram values, adding a system browsing tool.
In the PPC-2000 hybrid temperature controller introduced by Watlow Anafaze, multi-loop PID control function and programmable logic control function are integrated in the same process control software package, with 48 PID loops and 48 digital I /O point ability.
Moore introduced the Internet-based control system, Procidia, specifically designed for process control. The system is controlled by Internet technology, Procidia. The system uses local and remote operations and controls through the Internet and intranets of an enterprise, using self-configuration methods based on industrial PCs HMI and OPC server.
VMIC brought the industrial PC-based controller VMIPC-8400, which also embeds the corresponding IOWorks process control software package. The VMIPC-8400 complies with the IEC 61131-3 international standard and is ideally suited to the needs of continuous process control and PLC applications.
V. Redundancy features
In the field of industrial process control, the demand for products with higher reliability systems has been increasing year by year, the vast majority of which are driven by economic interests. The cost of a factory downtime loss is extremely expensive, and the resulting production costs increase. Especially in Europe, the main body of a series of rules and regulations is gradually being improved and strengthened. The IEC 61508 standard now published provides a design basis for the safety performance of the process control system, which is mainly formulated for the functional safety design within programmable electronic systems.
PLC has been used for a long time in the field of safety shutdown system. Perhaps Triconex and Pilz can provide us with many insights about this application, but other PLC suppliers are also looking at the prospects of this application area, but also make some PLC hardware suppliers feel very tricky. SoftPLC has introduced a solution for a redundant system to meet this application requirement and has also been applied in practical projects. Its application experience tells us that the main secret lies in the careful selection of hardware and unique I/O structure, and they also find some bus systems suitable for the application in this field and other unmatched things.
Other well-known PLC suppliers have recently provided corresponding products for safety and redundancy applications. Rockwell Automation has just launched the Guard PLC 1200 and 2000 series of safe process controllers and, along with its existing PLC system, provides monitoring and regulating safety operations for all automation systems. The process controller contains a redundant CPU system and uses internal test circuitry to check the operation of the I/O modules instead of directly using redundant I/O modules. The system complies with the IEC 61508 standard safety technology specification and is also accredited by the TuV product service organization. It can be fully applied to automated process control applications with SIL 3 safety level requirements.
Rockwell Automation also adds redundancy options to industrial users in its ControlLogix platform. A new software component is suitable for the 1757-SRM system redundancy module in order to make the appropriate choice. It can use RSLogix 5000 programming software to form a redundant system with other modules and use standard components such as power supplies, chassis, and ControlNet bridges.
Schneider Automation offers industrial customers a choice of Quantum family hot backup solutions for critical applications. When similar data information passes through the Quantum family of remote I/O processors, the host processor and data information it connects to needs to pass back and forth between the check link and the processor itself. The hot standby processor can monitor the addresses of the Modbus TCP/IP, Modbus+, and Modbus communication interfaces, so the control transmitter for client computer communications is explicitly transmitted.
Triconex recently announced a series of new products. Including a new version of the Trident triple modular redundancy controller that can be used in small application systems up to 450 measuring points, its features include an analog output module, a pulse input module and an enhanced communication function In addition to modules, it also includes off-the-shelf analog inputs, digital inputs/outputs, and solid state relay output modules. In addition, the controller is also fully compatible with the OPC connection specification, at the same time it is certified by the Tuv Rheinland organization and meets the SIL 3 safety level requirements, and also complies with the DIN AK 6 level installation specification.
Triconex also introduced a new version of TRICON 2003 PLC. Its main feature is that the digital processor is more than twice as fast as the original version.与以å‰çš„版本相比，TRICON 2003 PLCåŒæ ·å…¼å®¹OPC连接技术规范。
Siemenså…¬å¸å·²ç»å¼€å§‹ç§¯æžä¸»åŠ¨ä»‹å…¥è¿™ä¸€åº”领域，并åŠæ—¶æŽ¨å‡ºäº†SIMATIC S7-400F产å“。该产å“属于其高端S7-400 PLC的一个具有自动ä¿å®‰è£…置的版本，主è¦ç›®çš„是为安全åœæœºç³»ç»Ÿåº”用而设计的。它能够满足IEC61508æ ‡å‡†æ‰€åˆ¶å®šSIL 3安全ç‰çº§çš„è¿è¡Œè¦æ±‚。如果有临界应用情形å‘生，控制器能够进入到用户定义的安全状æ€ï¼Œä»¥ä¾¿æŒ‰ç…§é¢„定的顺åºæ‰§è¡Œåœæœºç¨‹åºï¼ŒéšåŽå°±å¯ä»¥å‘工业用 户æ供诊æ–æ•°æ®ä¿¡æ¯æŠ¥å‘Šã€‚系统程åºç”±SIMATIC STEP 7通用开å‘环境æ¥å®Œæˆï¼Œè¯¥å¼€å‘环境为工业用户æ供了程åºæ¨¡å—库和安全功能模å—。
GE Fanucå…¬å¸åŽ»å¹´å°±å·²ç»æŽ¨å‡ºäº†åž‹å·ä¸ºMax-ONçš„çƒå¤‡ä»½å†—ä½™è½¯ä»¶ï¼Œè¯¥è½¯ä»¶è¢«åº”ç”¨äºŽæ ‡å‡†ç³»åˆ—90-30 PLC系统，通过Genius LAN通信网络，远程I/Oå½¼æ¤ä¹‹é—´å¯ä»¥è¿›è¡Œé€šä¿¡ã€‚软件由å³æ’å³ç”¨åž‹å程åºç»„æˆï¼Œä»¥ä¾¿è¿›ä¸€æ¥å®Œæˆè¯¸å¦‚å˜é‡åŒæ¥ã€å†—ä½™I/O总线控制ã€ç¨‹åºç‰ä»·æµ‹è¯•ã€ä¸»CPU的挑选以åŠé«˜çº§è¯Šæ–ç‰ä¸€ç³»åˆ—任务。
å…ã€è¿åŠ¨æŽ§åˆ¶
PLC在è¿åŠ¨æŽ§åˆ¶é¢†åŸŸçš„应用也已ç»æœ‰å¾ˆé•¿ä¸€æ®µæ—¶é—´äº†ï¼Œè€Œä¸”还ä¿æŒäº†å¾ˆå¥½çš„增长趋势。
最近，Automationdirect.comå…¬å¸è®¡åˆ’为其DL205 PLC推出具有四通é“高速计数器的H2-CTRIO模件。该模件å•å…ƒæ”¯æŒ4个独立å¯ç»„æ€çš„100kHz计数器/定时器通é“，还具备4个隔离高速DC输出通é“，并è¿è¡ŒäºŽç‹¬ç«‹çš„CPU扫æ程åºï¼Œä½¿å…¶å…·å¤‡äº†éžå¸¸å¿«é€Ÿçš„å“应能力。该模件也能够通过本地基于计数事件的处ç†å™¨è¿›è¡Œç¼–程，而ä¸éœ€è¦ä»ŽæŽ§åˆ¶CPUä¸å¾—到任何å助。程åºè®¾è®¡é€šå¸¸é‡‡ç”¨DirectSoft32å’ŒThink & Do工控组æ€è½¯ä»¶åŒ…æ¥è¿›è¡Œã€‚
结åˆæœºæ¢°å’Œè¿åŠ¨æŽ§åˆ¶æ–¹é¢çš„内容，Giddings & Lewiså…¬å¸æ供了基于工业PCçš„MMC（机械与è¿åŠ¨æŽ§åˆ¶ï¼‰è½¯ä»¶äº§å“PiCPro for Windows，该软件兼容于IEC 61131-3æ ‡å‡†çš„æ¢¯å½¢é€»è¾‘å›¾å’ŒåŠŸèƒ½æ¨¡å—图表程åºè®¾è®¡æ–¹å¼ã€‚该软件内è—于PCI总线模件ä¸ï¼Œå½“宿主工业PCåœæœºä»¥åŽï¼Œè¯¥æ¨¡ä»¶å•å…ƒèƒ½å¤Ÿç»§ç»è¿è¡Œæ“作。其特点包括ä¸è¶…过32个轴å‘的模拟é‡æŽ§åˆ¶æˆ–者SERCOS伺æœç³»ç»ŸæŽ§åˆ¶ï¼Œå…·å¤‡è¿åŠ¨æŽ§åˆ¶æ€§èƒ½ï¼Œå†…è—OPCæœåŠ¡å™¨é©±åŠ¨ç¨‹åºã€ç”µåé‚®ä»¶å’Œæ–‡ä»¶ä¼ è¾“å™¨ï¼Œä»¥åŠä¸ºDeviceNet或者Profibusæ供的通信接å£ï¼Œå¦å¤–还æä¾›äº†æ ‡å‡†Internetå’ŒIntranet访问工具。
七ã€è½¯ä»¶å·¥å…·
现在，软件工具继ç»æˆä¸ºPLC用户最感兴趣的内容之一。对于PLC硬件，工业用户åªéœ€è¦å…³å¿ƒå…¶æ€§èƒ½å’Œä»·æ ¼æ–¹é¢çš„内容å³å¯ã€‚当å‰ï¼Œè¶Šæ¥è¶Šå¤šçš„PLC用户希望能够寻找到更多的软件工具和集æˆå·¥å…·ï¼Œä»¥ä¾¿èƒ½å¤Ÿè¿›ä¸€æ¥æ高PLC硬件的性能。
工业用户所有工作的目的在于实现系统集æˆï¼Œæ‰€ä»¥ä»–们æ£åœ¨åŠªåŠ›å®žçŽ°å°†è¿åŠ¨è½¯ä»¶åŒ…ã€PLCã€æ“作员界é¢ç”šè‡³Internet结åˆåœ¨ä¸€èµ·ã€‚åŒæ—¶ï¼Œå·¥ä¸šç”¨æˆ·è¿˜å¸Œæœ›å¼€æ”¾æŽ§åˆ¶èƒ½å¤Ÿå®Œæˆé€»è¾‘控制，也能够è¿è¡ŒJava脚本程åºã€‚
然而，问题在于工业用户通常是通过è´ä¹°PLC硬件产å“çš„æ–¹å¼æ¥å…费获得软件工具的。如果工业用户打算支付软件费用，他们希望花åŒæ ·çš„费用能够è´ä¹°åˆ°ä¸Žå¸‚场上质é‡ç›¸åŒçš„PC软件。软件供应商也æ£åœ¨åŠªåŠ›å¼€å‘，并希望能够为工业用户æ供更多软件工具的选择机会。
Rockwell自动化公å¸æ供了基于RSLogix系列版本的袖ç型软件RS-PocketLogix，该软件è¿è¡Œåœ¨åŸºäºŽWindows CEæ“作系统平å°çš„袖ç型计算机上，用于工厂底层SLC-500å’ŒMicroLogixå¯ç¼–程控制器的维护和故障处ç†ï¼Œæ”¯æŒPLC-5和所预定的ControlLogix逻辑控制程åºã€‚
现在，Rockwell自动化公å¸å·²ç»å°†è½¯ä»¶å‡çº§åˆ°RSLogix 5000系列版本，该系列软件版本采用了ControlLogix结构体系和Logix 5550处ç†å™¨ã€‚RSLogix系列版本软件其自身已ç»å‡çº§åˆ°4.0，æ¤å¤–，借助于对AI系列入å£å‘½ä»¤ã€æ”¹è¿›çš„安全性能和有效性对比，以åŠä¸€ç§æ–°åœ°å€å‘导的支æŒï¼Œèƒ½å¤Ÿæ”¯æŒABå…¬å¸çš„PLC产å“和个别改进程åºã€‚
Nematronå…¬å¸ä¹Ÿå·²ç»å‘布了5.40ç‰ˆæœ¬çš„å·¥ä¸šè‡ªåŠ¨åŒ–å¥—è£…è½¯ä»¶ï¼Œè¯¥è½¯ä»¶å¢žåŠ äº†åœ¨çº¿é€»è¾‘æŽ§åˆ¶å˜æ›´ã€æµç¨‹å›¾è¡¨è·Ÿè¸ªç‰åŠŸèƒ½ï¼Œå…è®¸å·¥ä¸šç”¨æˆ·çœŸå®žåœ°è·Ÿè¸ªé€»è¾‘æŽ§åˆ¶è·¯å¾„ï¼Œå¢žå¼ºæŠ¥è¡¨å’Œç¼–è¾‘èƒ½åŠ›ï¼ŒåŒ…æ‹¬æ ‡è¯†ç¬¦äº¤å‰æœç´¢å’Œæ‰€æœ‰æŠ¥è¡¨æ‰“å°ç‰ã€‚为æµç¨‹å›¾è¡¨å¼€å‘所增强的编辑功能包括全程æœç´¢ã€æ ‡è¯†ç¬¦å称的替æ¢ã€è‡ªé€‚应æµç¨‹å›¾è¡¨æ¨¡å—，以åŠæ”¹è¿›çš„剪切和粘贴性能，以便有能力将注释性内容嵌入到æµç¨‹å›¾è¡¨æ¨¡å—ã€‚æ–°ç‰ˆæœ¬è½¯ä»¶ä¹Ÿå¢žåŠ äº†å¯¹OPC 2.0的支æŒèƒ½åŠ›ï¼ŒåŒ…æ‹¬æ ‡è¯†ç¬¦æµè§ˆå’Œæ•°æ®ä¿¡æ¯è®¿é—®ç‰ã€‚
Siemenså…¬å¸çš„SIMATIC STEP 7是一套全开放专业版软件，并已ç»æˆä¸ºè¯¥å…¬å¸é€šç”¨å¼€å‘环境软件工具，直接用于组æ€ã€ç®¡ç†å’Œç»´æŠ¤å·¥åŽ‚范围内的自动化控制系统。该软件使工业用户å¯ä»¥å°†ä¸€ä¸ªè‡ªåŠ¨åŒ–工程项目å†ç»†åˆ†æˆè®¾è®¡é˜¶æ®µã€æ‰§è¡Œä¸Žæµ‹è¯•ã€å§”托与å¯åŠ¨ã€è¿è¡Œï¼Œä»¥åŠç»´æŠ¤ç‰ï¼Œç„¶åŽï¼Œå°†æ‰€æœ‰å·¥ä½œé›†æˆåœ¨å•ä¸ªè½¯ä»¶åŒ…内。å•ä¸ªè‡ªåŠ¨åŒ–工程项目å¯ä»¥é‡‡ç”¨è®¸å¤šç¨‹åºè®¾è®¡è¯è¨€çš„任何组åˆæ¥è¿›è¡Œç¼–程工作，从而在其ä¸é€‰æ‹©æœ€é€‚åˆäºŽæ‰€ç»™å®šåº”用程åºçš„那一部分。åŒæ ·çš„程åºä»£ç 能够在基于工业PCçš„SIMATIC WinAC控制系统ä¸å¾—到è¿è¡Œï¼Œä»¥æ»¡è¶³è½¯ä»¶å’Œç¡¬ä»¶å¯¹å®žæ—¶æ€§çš„è¦æ±‚。
ä¸ä¹…以å‰ï¼Œæ–°åˆå¹¶æˆç«‹çš„Entivityå…¬å¸å·²ç»å‘布了Think & Do Live软件。该软件是一套基于e-控制方案的产å“，并集æˆäº†æŽ§åˆ¶ã€é€šä¿¡å’Œä¿¡æ¯æŠ€æœ¯ï¼ŒåŒæ—¶ä¹Ÿæ˜¯ä¸€å¥—能够æ高生产效率的现代化软件工具。该软件所内è—的机械和过程监控功能能够与å¯æ“作的信æ¯æ˜¾ç¤ºç»“åˆèµ·æ¥ï¼Œä»¥ä¾¿è¿›ä¸€æ¥æ高生产效率。该软件还能够被应用作为综åˆæŽ§åˆ¶ã€é€šä¿¡å’Œç›‘控系统的解决方案，或者应用于é—ä¼ ç®—æ³•æŽ§åˆ¶ç³»ç»Ÿã€‚
åŒæ ·ï¼ŒAutomationdirect.comå…¬å¸ä¹ŸæŽ¨å‡ºäº†æ–°ç‰ˆæœ¬çš„基于工业PC的过程控制软件包，现在，该软件包包括了全套OPC 2.0兼容æœåŠ¡å™¨ï¼Œä»¥åŠå¯¹RUNtime PCå’ŒWinPLC的完全性支æŒèƒ½åŠ›ã€‚
Schneiderå…¬å¸æŽ¨å‡ºå…¶Modsoft系列产å“的新一代软件ProWORX Nxt，该软件为Quanturn〠Compactå’ŒMomentum PLCç‰æµè¡Œç¡¬ä»¶äº§å“å¹³å°æ供了基于Windowsæ“作系统的图形化用户界é¢ï¼Œä¹Ÿæ供了与984系列产å“兼容的梯形图逻辑编辑器，为编程é¢æ¿å’ŒPLC之间æ供了直接或者网络方å¼ååŒå·¥ä½œçš„连接选择。å¦å¤–，它还支æŒModbusã€Modbus+å’Œä¾é Ethernet TCP/IPå议的局域网连接方å¼ã€‚其他特点包括组æ€çŽ¯å¢ƒä¸çš„最新型图形化用户界é¢ã€æ”¹è¿›åž‹æ–‡æ¡£ï¼Œä»¥åŠæ”¯æŒæ‰€æœ‰æ¢¯å½¢å›¾å’Œæ–‡æ¡£ä¹‹é—´è½¬æ¢çš„实用程åºã€‚
最近，Giddings & Lewiså…¬å¸ä¸ºå·¥ä¸šç”¨æˆ·æ供了一套集æˆäº†IEC 61131-3æ ‡å‡†é€»è¾‘å’Œè¿åŠ¨æŽ§åˆ¶ç¼–程环境的软件产å“，å³PiCPro for Windows。该软件产å“将所有特点集æˆåœ¨ä¸€ä¸ªå·¥ç¨‹é¡¹ç›®ç®¡ç†å™¨ä¹‹ä¸ï¼Œå¯ä»¥åœ¨çº¿å¼€å‘用户帮助信æ¯ï¼Œè¿˜å¯ä»¥é€šè¿‡Internet进行程åºè®¾è®¡ï¼ŒåŒæ—¶æ”¯æŒSERCOS系列è¿åŠ¨æŽ§åˆ¶äº§å“。
自从所有编程方å¼è¢«è½¯ä»¶å·¥å…·æ›¿ä»£ä»¥æ¥ï¼ŒPLC编程软件已ç»å‘ç”Ÿäº†æ ¹æœ¬æ€§çš„å˜åŒ–，而且这些软件工具ä»ç„¶ä¿æŒç€ä¸€å®šçš„增长趋势，并且ä¸æ–有适åˆäºŽå„ç§åº”用的新特点诞生。
Siemenså…¬å¸æŽ¨å‡ºçš„3.2版本STEP 7-Micro/Win 32程åºè®¾è®¡è½¯ä»¶æ供了一ç§æ–°çš„FBD编辑器，以åŠä¸ŽIEC 61131-3æ ‡å‡†å…¼å®¹çš„æ¢¯å½¢å›¾ç¨‹åºè®¾è®¡è¯è¨€å’ŒFBD。该软件能紧密地与Windowsæ“作系统集æˆåœ¨ä¸€ä¸°æ”¶ï¼Œæä¾›è¯¸å¦‚å¢žåŠ /移动程åºå’Œå®šåˆ¶å®‰è£…æ–¹å¼ç‰ä¸€ç³»åˆ—功能特性。åŒæ ·ï¼Œåœ¨Windowsä¸é‡‡ç”¨å•ä¸ªå·¥ç¨‹é¡¹ç›®æ–‡ä»¶çš„æ–¹å¼æ›´åŠ 容易对工程项目进行管ç†ï¼Œå¦‚电å邮件和备份ç‰ã€‚å¦å¤–它还æ供了新的ä¿å˜æ–¹å¼é€‰æ‹©ï¼Œåªè¦åŒå‡»å·¥ç¨‹é¡¹ç›®æ–‡ä»¶å°±èƒ½å¤Ÿè‡ªåŠ¨å¯åŠ¨å·¥ç¨‹é¡¹ç›®ã€‚
SoftPLCå…¬å¸æ£å¥½ä¹Ÿå‘布了TOPDOC NexGen（被称为下一代）软件。TOPDOC是一个梯形图逻辑程åºç¼–辑器和用于SoftPLC开放结构体系控制软件与过程控制器的维护工具。该软件采用了Java程åºè®¾è®¡è¯è¨€è¿›è¡Œå¼€å‘，其主è¦ç‰¹ç‚¹æ˜¯å……分采用了Web技术，从一个Webæµè§ˆå™¨ä¸Šå°±å¯ä»¥è¿›è¡Œè¿œç¨‹ç›‘控和修改PLCå‚数，而且能够è¿è¡Œåœ¨Windowså’ŒéžWindowsæ“作系统平å°ä¸Šï¼Œå¦‚Linux。
Altersyså…¬å¸å’ŒIndusoftå…¬å¸è¿›ä¸€æ¥è”åˆèµ·æ¥ï¼Œåˆ†åˆ«æŽ¨å‡ºäº†åŸºäºŽAltersyså…¬å¸ISaGRAF系列的Virgo自动化套装软件，以åŠåŸºäºŽIndusoftå…¬å¸çš„Web工作室。Virgo套装软件能够嵌入到Windows CEä¸ï¼Œå¹¶é€šè¿‡Internet与其他过程控制系统建立起通信链路。借助于ISaGRAF系列产å“å’ŒIEC 61131-3æŠ€æœ¯æ ‡å‡†ï¼ŒVirgo套装软件包括了自动化过程控制系统（嵌入å¼æˆ–者éžåµŒå…¥å¼ï¼‰ç»„æ€å’Œè¿è¡Œæ‰€å¿…需的软件部件，如HMIã€æŠ¥è¦ã€äº‹ä»¶è®°å½•ã€è¶‹åŠ¿è®°å½•ã€ç¡¬å®žæ—¶æŽ§åˆ¶å’Œé€šä¿¡ç‰ã€‚
å¦å¤–一ç§æ¥è‡ªäºŽIPMIå…¬å¸çš„基于Java技术开å‘的软件产å“是EPS for Java，该软件é‡æ–°å¼€å‘了新版本的图形化继电器梯形逻辑组æ€ç¼–辑器。由于该软件基于Java程åºè®¾è®¡è¯è¨€ï¼Œå› æ¤æ˜¯ä¸€ä¸ªäº¤å‰è¿è¡Œå¹³å°ï¼Œç›¸åŒçš„æ‹·è´å¯ä»¥è¿è¡Œåœ¨Windows 95/98ã€Macintosh或者其他æ“作系统平å°ï¼Œå¹¶åŒæ—¶æ”¯æŒJavaè¿è¡ŒçŽ¯å¢ƒã€‚
Entivityå…¬å¸æœ€è¿‘å‘布了版本å·ä¸º6çš„Think & Do Studio软件产å“。该软件产å“是建立在VisioæŠ€æœ¯åŸºç¡€ä¹‹ä¸Šï¼Œå¹¶åœ¨ä¸€ä¸ªæ ‡å‡†å¼€å‘环境ä¸é›†æˆäº†æµç¨‹å›¾è¡¨æŽ§åˆ¶é€»è¾‘ã€HMIã€è¿åŠ¨æŽ§åˆ¶ã€PID回路控制ã€æ™ºèƒ½åŒ–I/O控制设备接å£ï¼Œä»¥åŠå·¥ç¨‹é¡¹ç›®æ–‡æ¡£å·¥å…·ã€‚该软件å¯ä»¥å®Œå…¨å‡çº§å¹¶è·¨è¶ŠMicrosoft Windowså¹³å°ï¼Œåˆ°ç›®å‰ä¸ºæ¢ï¼Œæ®è¯´æ˜¯ç¬¬ä¸€å¥—基于COTS软件平å°çš„过程控制软件包。其最显著的特点之一就是所具有的自动查找和组æ€å·¥å…·èƒ½å¤Ÿä½¿å…¶éžå¸¸å®¹æ˜“地连接到智能化I/O过程控制设备网络系统ä¸åŽ»ã€‚
å…«ã€ç¡¬ä»¶ä¸Žè½¯ä»¶
通过çŸçŸå‡ 年的努力，我们ä¸æ–看到有许多新的软逻辑控制软件产å“被推出。许多独立软件供应商已ç»å¼€å§‹å‡ºå”®è¿™ç§è½¯ä»¶äº§å“ï¼Œä¼ ç»ŸPLC供应商在他们的产å“目录ä¸ä¹Ÿå·²ç»å¼€å§‹é€æ¸å¢žåŠ 基于工业PC的控制产å“。å¦å¤–，PLCå¼€å‘费用ä¸ï¼Œè½¯ä»¶å¼€å‘费用所å 的百分数æ£å¾—到稳定的增长。例如，Rockwellå…¬å¸å°†40ï¼…çš„å¼€å‘费用投入到硬件产å“å¼€å‘ä¸ï¼Œè€Œå°†60ï¼…å·¦å³çš„å¼€å‘费用转移到了软件开å‘工作上。其ç€çœ¼ç‚¹åœ¨äºŽå…¨çƒå¸‚场对软件产å“有强大的è´ä¹°åŠ›ï¼Œå¹¶è¦æ±‚软件产å“èƒ½å¤Ÿæ›´åŠ å®Œç¾Žåœ°è¿è¡Œåœ¨å·¥ä¸šæ ‡å‡†å¹³å°ä¸Šã€‚
PLC一般总是使用梯形图逻辑控制程åºï¼ŒçŽ°åœ¨ï¼Œæ‰€æœ‰ç±»åž‹çš„其他产å“æ£åœ¨åŠªåŠ›èŽ·å¾—并使用一些或者全部与IEC 61131-3æ ‡å‡†å…¼å®¹çš„ç¨‹åºè®¾è®¡è¯è¨€ï¼ŒåŒ…括梯形图逻辑图表ã€åŠŸèƒ½æ¨¡å—图表ã€é¡ºåºåŠŸèƒ½å›¾è¡¨ã€ç»“构化文本和指令表ç‰ç¨‹åºè®¾è®¡è¯è¨€ã€‚
然而，硬件ã€æ“作系统和应用软件相互之间都是延缓æ¤ç‹¬ç«‹çš„å®žä½“ï¼Œä¸Žä¼ ç»Ÿçš„å…¨é›†æˆPLC系统有很大的ä¸åŒã€‚éšç€ç¡¬ä»¶å’Œæ“作系统的ä¸æ–å‘展，æ“作系统所æä¾›çš„æ ‡å‡†å•†ä¸šåŒ–åŠŸèƒ½ç‰¹æ€§å¯èƒ½ä¼šè¿›ä¸€æ¥ä¿ƒä½¿PLCå˜æˆä¸€ç§æ›´åŠ ä¸åŒçš„控制设备，这也就是PLC需è¦é‡‡IEC61131-3æ ‡å‡†ç¨‹åºè®¾è®¡è¯è¨€çš„åŽŸå› æ‰€åœ¨ã€‚
å¯ä»¥é‡‡å–å„ç§æ–¹å¼æ¥è§£å†³PLC的编程问题。Rockwellå…¬å¸å¯¹å…¶æ‰€æœ‰äº§å“å‡é‡‡ç”¨Logix系列软件æ¥ç¼–程，包括机器人控制器ã€è½¯é€»è¾‘æŽ§åˆ¶å™¨ã€‚ä¼ ç»ŸPLC系统全部采用RSLogix 5000软件进行编程工作。其他途径包括微软技术，åƒDCOMã€ActiveX以åŠSunçš„Javaç‰ï¼Œåœ¨å°†æ¥ï¼Œä¹Ÿè®¸ä¼šä½¿ç”¨Microsoft.Net技术，其ä¸å¤§å¤šæ•°ç¼–程方å¼æ˜¯é€šè¿‡Sunå®ç³»ç»Ÿå’ŒONE（开放网络环境）æ¥å‘布的。
基于Windows CEçš„åº”ç”¨è½¯ä»¶å’Œæ ‡å‡†å·¥å…·å°†å…许工业用户å¯ä»¥é€šè¿‡å¤šé‡ç¡¬ä»¶ç”Ÿå‘½å‘¨æœŸçš„æ–¹å¼æ¥ä¿æŠ¤ä»–们所è´ä¹°çš„软件。这ç§è¶‹åŠ¿å°†è¿›ä¸€æ¥æ”¹å˜å·¥ä¸šç”¨æˆ·å¯¹ä¼ 统PLC产å“产å“çš„è´ä¹°å†³å¿ƒï¼Œè€Œä¸”ä»ç„¶è¦æ¶‰åŠåˆ°PLC硬件技术规范ã€å¤–围设备和通信连接能力，这好åƒæœ‰äº›ç±»ä¼¼äºŽè´ä¹°ä¸€å°å·¥ä¸šPCã€‚ç›¸å¯¹äºŽå·¥ä¸ºä¸€ç”¨æˆ·ä¹ æƒ¯æ€§å†³å®šè¿‡ç¨‹è€Œè¨€ï¼Œä»–ä»¬éœ€è¦è®¤çœŸè¯„价一ç§è¿‡ç¨‹æŽ§åˆ¶å™¨åŠå…¶ç¼–程软件的çµæ´»æ€§ã€‚这也有助于平æ¯äººä»¬è¯„价哪ç§ç¨‹åºè®¾è®¡è¯è¨€æ˜¯æœ€å¥½çš„争论。梯形图逻辑ã€æµç¨‹å›¾è¡¨ã€é™æ€é€»è¾‘ã€åŠŸèƒ½æ¨¡å—ã€IEC 61131-3æ ‡å‡†æ··åˆç¼–程，连åŒVisual Basicå’ŒVisual C++ç‰éƒ½èƒ½å¤Ÿå¾ˆå®¹æ˜“地把基于Windows CEçš„PLC作为一ç§å¯¹è±¡æ¥å¯¹å¾…处ç†ã€‚ä¸ä¹…以å‰ï¼Œä¸€äº›äº²çš„软逻辑和基于工业PC控制的产å“å·²ç»é—®ä¸–。
æ¥è‡ªäºŽåˆ¶é€ 业数æ®ç³»ç»Ÿï¼ˆMDS）公å¸çš„WinMotion软件在å•ä¸ªå¥—装软件ä¸æ供了软è¿åŠ¨æŽ§åˆ¶ã€è½¯é€»è¾‘控制（兼容IEC 61131-3æ ‡å‡†ï¼‰å’Œä¸€å¥—æ•°æ®æœåŠ¡å™¨ï¼Œå¹¶ä¸éœ€è¦ä»»ä½•è¿åŠ¨æŽ§åˆ¶æŽ¥å£å¡ä»¶ï¼Œæˆ–者专用硬件产å“。æ¤å¤–，它还能以实时方å¼æ供连ç»åŒ…括维护ã€ç”Ÿäº§å’Œè´¨é‡ç‰æ•°æ®ä¿¡æ¯ã€‚该软件å¯ä»¥è¿è¡Œåœ¨å…·æœ‰å•ä¸ªå¤„ç†å™¨å¹¶å®‰è£…有VenturCom RTX软件部件的Windows NTæ“作系统平å°ä¸Šã€‚该公å¸è¿˜å…¬å¸ƒäº†ä¸€å¥—开放å¼API接å£ï¼Œèƒ½å¤Ÿè®©å·¥ä¸šç”¨æˆ·è¿›æ¥é›†æˆç¬¬ä¸‰æ–¹è½¯ä»¶æŠ€æœ¯ã€‚
Rockwellå…¬å¸ä¹ŸæŽ¨å‡ºäº†SoftLogix 5800软件。该软件æ供了一ç§æ–°çš„软控制器，在一个相åŒçš„控制系统ä¸ï¼Œèƒ½å¤ŸåŒæ—¶å®Œæˆé¡ºåºå’Œè¿åŠ¨æŽ§åˆ¶åŠŸèƒ½ã€‚与该公å¸å…¶ä»–Logix产å“ä¸€æ ·ï¼Œè¯¥è½¯ä»¶ä»ç„¶ä½¿ç”¨äº†Logixè¿è¡Œå¼•æ“Žï¼ŒRSLogix 5000编程软件和NetLinx开放å¼ç½‘络。该软件也能è¿è¡Œåœ¨Windows NT/2000æ“作系统平å°ä¸Šã€‚
å‰ä¸ä¹…，Entivityå…¬å¸æŽ¨å‡ºäº†5.1版本的å¯è§†åŒ–é€»è¾‘æŽ§åˆ¶å™¨è½¯ä»¶ã€‚å…¶æ˜¾è‘—ç‰¹ç‚¹æ˜¯å¢žåŠ äº†ä¸€ä¸ªå¯¹DeviceNetæ ‡è¯†ç¬¦ç»„æ€å™¨çš„安装选项，以åŠæ”¹è¿›çš„OPCæœåŠ¡å™¨ã€‚该软件对NVRAM有更好的支æŒèƒ½åŠ›ã€‚
Automationdirect.comå’ŒKWå…¬å¸è”åˆæŽ¨å‡ºäº†é€‚åˆäºŽWinPLC CPU模件è¿è¡Œå¼•æ“Žå¹¶å…¼å®¹äºŽIEC 61131-3æ ‡å‡†çš„ProConOS PLC产å“。它具有抢å å¼ã€å¤šä»»åŠ¡è¿è¡Œå¼•æ“Žï¼Œè€Œä¸”被嵌入到Win-PLC模件ä¸ã€‚应用程åºçš„å¼€å‘采用MULTIPROGæ¥å®Œæˆï¼ŒMULTIPROG是一套兼容IEC 61131-3æ ‡å‡†çš„è½¯ä»¶å¼€å‘工具，它å…许工业用户在WinPLC上åŒæ—¶è¿è¡Œä»»åŠ¡ï¼Œç„¶åŽè¢«ç‹¬ç«‹åœ°è¿è¡Œï¼Œè€Œä¸”å¯ä»¥å…·æœ‰ä¸åŒçš„è¿è¡Œå¾ªçŽ¯å‘¨æœŸå’Œæ—¶é—´ç‰ˆæ®µã€‚
Twin CAT软件系统公å¸æ‰€æŽ¨å‡ºçš„Beckhoff软件å¯ä»¥è¿è¡Œåœ¨å®‰è£…有Windows NT/2000或Windows CE的工业PC上，能够将I/O接å£åµŒå…¥åˆ°å®žæ—¶è¿‡ç¨‹æŽ§åˆ¶å™¨ä¸ï¼Œå½¢æˆå¤šPLC系统ã€NCè½´å‘控制ã€ç¨‹åºè®¾è®¡çŽ¯å¢ƒå’Œæ“作站。所显示出æ¥çš„特点实际上是嵌入了IEC 61131-3软件的PLC,或者是工作于Window NT/2000æ“作系统平å°ä¸‹çš„软件NC。程åºå’Œè¿è¡Œç³»ç»Ÿå¯ä»¥åœ¨ç›¸åŒæˆ–者独立的工业PC上è¿è¡Œã€‚用户界é¢å’Œå…¶ä»–程åºä¹‹é—´çš„æ•°æ®ä¿¡æ¯é€šä¿¡åˆ™ä¾é Microsoftå…¬å¸çš„开放å¼æ ‡å‡†ï¼Œå¦‚OPCã€OCXã€DLLç‰ã€‚
ä¹ã€é€‚åˆPLC应用的新模件
å‰æ–‡å·²è®¨è®ºäº†æ–°çš„适åˆäºŽPLCçš„æ’å…¥å¼è¿åŠ¨æŽ§åˆ¶æ¨¡ä»¶ã€‚对于其他类型的æ’å…¥å¼éƒ¨ä»¶åŠå…¶é™„件，å¯ä»¥èŽ·å¾—更好的选择，åŒæ ·è¿˜æœ‰ä¸€äº›è¾ƒæ–°çš„选择方案。
Siemenså…¬å¸å·²ç»æŽ¨å‡ºäº†ä¸€ç§æ–°çš„基于AS-IçŽ°åœºæ€»çº¿æ ‡å‡†é€šä¿¡å¤„ç†å™¨æ¨¡ä»¶CP243-2，该模件为低级å˜é€å™¨æ€»çº¿æ供了直接地å€è¿žæŽ¥æ–¹å¼ï¼Œè¿˜èƒ½å¤Ÿä¸Žä»»ä½•S7-200 CPUåŠå…¶æ‰©å±•ç‰ˆæœ¬å·¥ä½œåœ¨ä¸€èµ·ã€‚
Automnationdirect.comå…¬å¸æŽ¨å‡ºäº†ä¸€ç§å为EZTextçš„æ–°åž‹PLC文本æ“作é¢æ¿ï¼Œè¯¥äº§å“支æŒå¹¿æ³›é€šä¿¡å议驱动程åºçš„选择。所支æŒçš„通信å议包括该公å¸çš„LOGICã€ABå…¬å¸çš„DF1ã€Omronå…¬å¸çš„Host Linkã€Mitsubishiå…¬å¸çš„FX系列ã€Modiconå…¬å¸çš„Modbus RTUå’ŒGE Fanucå…¬å¸çš„SNPXç‰ã€‚æ¯ä¸ªEZTextæ“作é¢æ¿éƒ½å¯ä»¥åœ¨DeviceNet版本ä¸å¾—到很好的利用。所有模伯å‡æ供了5个用户å¯å®šä¹‰æŒ‰é’®ã€ä¸€ä¸ªå†…è—èœå•ç³»ç»Ÿã€æ»šåŠ¨å¼æ•°æ®ä¿¡æ¯è¾“入，以åŠå…¨éš”离电æºä¾›åº”。EZTextæ“作é¢æ¿è¿˜æ供了5个用户这下义的LEDå’ŒLCD显示窗å£ï¼Œå¯æ”¯æŒ2-4è¡Œä¸è¶…过20个å—符数æ®ä¿¡æ¯çš„显示。
Aromatå…¬å¸ä¸ºå…¶FP0系列PLCæ供了一ç§å…·æœ‰12ä½åˆ†è¾¨åŠ›å’Œ8通é“模拟é‡è¾“入模件。一个FP0能够处ç†ä¸è¶…过24路的模拟é‡è¾“入信å·ï¼Œè¿˜èƒ½å¤Ÿå®Œæˆå¤šç§æµ®ç‚¹æ•°å—è¿ç®—ã€ç²¾ç¡®PID控制和自整定。åªè¦é€šè¿‡è°ƒåˆ¶è§£è°ƒå™¨å°±èƒ½å¤Ÿè¿›è¡Œæ¨¡æ‹Ÿé‡ä¿¡å·çš„远程监控。
åŒæ ·ä¹Ÿæ¥è‡ªäºŽAromatå…¬å¸çš„一ç§æ–°æ¨¡ä»¶æ˜¯FP2 PLC。FP2 PLC模件具有高速计数能力，ä¾é 4个信å·é€šé“其最高频率å¯ä»¥è¾¾åˆ°200kHzï¼›åŒæ—¶ï¼Œä¸€ä¸ªæ´»åŠ¨çš„电动机动动å•å…ƒèƒ½å¤Ÿå¤„ç†4个方å‘çš„è½´å‘è¿åŠ¨ï¼Œè€Œä¸”æ¯ä¸ªè½´å‘è¿åŠ¨çš„速度å¯ä»¥è¾¾åˆ°100kp/s。å¦å¤–，它还具环回路控制或者PWM输出。
ABB自动化公å¸æ出了一ç§æ–°çš„称为Industrial IT的编程解决方案，并æˆä¸ºå…¶AC 800F现场控制器产å“的一部分。AC 800F所具有的开放结构å•å…ƒä½“系能够åŒæ—¶å¤„ç†æœ¬åœ°å’Œè¿œç¨‹I/O模件ã€æ™ºèƒ½åŒ–ä¼ æ„Ÿå™¨çš„4-20mAä¿¡å·ï¼Œæ˜¯ä¸€ç§å…·å¤‡äº†å¤šç§çŽ°åœºæ€»çº¿æŠ€æœ¯çš„现场控制器。AC800F还æ供了å‡å°‘工程设备安装周期和资产优化分æžç‰æ€§èƒ½ï¼Œé€šè¿‡OPC技术æ高了与ActiveXå’ŒWeb的连接能力。AC800Fä¸çš„æ¯ä¸ªå•å…ƒå¯ä»¥ä»Ž4ç§ç‹¬ç«‹çš„现场总线网络采集和处ç†å„ç§è¯Šæ–æ•°æ®ä¿¡æ¯ï¼Œå®ƒè¿˜æ供了与IEC61131-3兼容的编程工具软件。
åã€é©¾å¾¡çŽ°åœºè®¾å¤‡çº§æŽ§åˆ¶
éšç€é€šä¿¡æŠ€æœ¯çš„进一æ¥å‘展，有å¯èƒ½åˆ©ç”¨é€šä¿¡ç³»ç»Ÿå°†æŽ§åˆ¶åŠŸèƒ½å½¢æˆé—çŽ¯è¿‡ç¨‹æŽ§åˆ¶ï¼Œå› ä¸ºè¶Šæ¥è¶Šå¤šçš„控制计算机已ç»åµŒå…¥äº†I/O系统。
例如，Rockwell自动化公å¸æ‰€æŽ¨å‡ºçš„DeviceLogix充分应用了模件技术，能够被完全集æˆåˆ°å·¥åŽ‚底层现场过程控制设备ä¸åŽ»ï¼Œä¸ºçŽ°åœºè®¾å¤‡çº§æä¾›äº†ä½Žä»·æ ¼è¿‡ç¨‹æŽ§åˆ¶åº”ç”¨ã€‚DeviceLogix还æ供了简å•åŒ–独立过程控制应用特点和性能，诸如å•ä¸ªåº”用æ¡ä»¶ã€äº‹ä»¶ä¾¦æµ‹ã€æŠ¥è¦ç®¡ç†å’Œå¸ƒå°”逻辑è¿ç®—ç‰ï¼Œå‡è½»äº†å…·æœ‰è¾ƒå¤šæŽ§åˆ¶ä»»åŠ¡çš„控制系统主控制器，甚至是最低级过程控制设备的负担。首先推出的过程控制产å“是ABå…¬å¸çš„1792/1792D系列ã€ArmorBlock MaXum I/O系列ã€1791D CompactBlock I/O系列ã€1799嵌入å¼I/O系列，以åŠ800E DeviceNet局部æ“作站和DeviceNet辅助软起动器系列。
在2000å¹´åˆï¼ŒSiemenså…¬å¸å°±æŽ¨å‡ºäº†IM 151/CPU，åŒæ—¶å°†æ‰€å¢žåŠ çš„PLC功能应用到ET 200S I/O系列产å“。
Festoå…¬å¸ä¹Ÿå·²ç»å°†PLC技术嵌入到其气调节阀产å“ä¸ã€‚该公å¸è¿‘推出的SB6产å“在这一领域得到了很好的应用。å¦å¤–，它æ供了与ABå…¬å¸SLC-500相åŒçš„技术特点，通过便æºå’Œè¿œç¨‹ç‰å¢žåŠ 了数å—é‡çš„模拟é‡I/O系列模件通é“。SB6还æ供了一个兼容于DeviceNet的电åå¼èŠ‚点，能够与DeviceNetæ•°æ®é‡‡é›†å™¨é›†æˆåœ¨ä¸€èµ·ï¼Œç™¾ä¸”介于电å模件和气动模件之间，为å„ç§åº”用功能æ供了PLC逻辑控制。
Phoenix Contactå…¬å¸æ‰€æŽ¨å‡ºçš„系列化DIN架装å¼PLC被称作远程现场控制器（RFC），而且éžå¸¸é€‚åˆäºŽInterbus I/O系统的应用。所有模件å•å…ƒéƒ½èƒ½å¤Ÿé‡‡ç”¨PCWORX组æ€å·¥å…·è½¯ä»¶è¿›è¡Œç¼–程设计工作，PCWORX是套完全基于IEC61131-3æ ‡å‡†çš„ç»„æ€å·¥å…·è½¯ä»¶åŒ…。
Wagoå…¬å¸æ‰€æŽ¨å‡ºçš„å¯ç¼–程现场控制器能够完全与其Wago I/O系统工作在一起，å…许工业用户在本地å˜å‚¨å’Œè¿è¡Œç¨‹åºï¼ŒåŒæ—¶è¿˜èƒ½å¤Ÿä¸Žç½‘络系统进行通信。它并ä¸éœ€è¦é€šè¿‡ç½‘ç»œä¼ è¾“å°±èƒ½å¤Ÿå¯¹ä¿¡å·è¿›è¡Œé¢„处ç†å’Œé€»è¾‘解决方案的调试。信å·é¢„处ç†ä»Žç›¸å½“程度上é™ä½Žäº†è£…载现场数æ®ä¿¡æ¯çš„è´Ÿè·ï¼Œèƒ½å¤Ÿä¸ºçŽ°åœºè¿‡ç¨‹æŽ§åˆ¶å»ºç«‹èµ·éžå¸¸å®Œå–„的分散控制应用。
VMICå…¬å¸åŒæ ·ä¹ŸæŽ¨å‡ºäº†å¢žå¼ºåž‹ç‰ˆæœ¬çš„DIN架装å¼IOMax PC控制器，å³VIOMAX-8450。现在该控制器已ç»é‡‡ç”¨äº†300MHzçš„MMX微处ç†å™¨èŠ¯ç‰‡ï¼Œè€Œä¸”ä»ç„¶é‡‡ç”¨åŸºäºŽIEC 61131-3æ ‡å‡†çš„IOWorks控制组æ€å·¥å…·è½¯ä»¶åŒ…进行编程设计。
å一ã€æ›¿ä»£åµŒå…¥å¼æŽ§åˆ¶å™¨
æ®ç›¸å…³è°ƒæŸ¥æŠ¥å‘Šæ˜¾ç¤ºï¼ŒçŽ°åœ¨å¯¹äºŽä½Žç«¯PLC市场的争夺ä»åœ¨ç»§ç»è¿›è¡Œï¼Œè¿™ä¹Ÿè¿›ä¸€æ¥ä¿ƒè¿›äº†PLCçš„å‘展。éšç€å¾®åž‹å’Œè¶…微型PLC技术的å‘展和数é‡çš„增长，它们已ç»å¼€å§‹è¿›å…¥åˆ°æ–°çš„应用领域。例如，微型PLCå·²ç»å¼€å§‹æ›¿åµŒå…¥å¼æŽ§åˆ¶å™¨çš„工作内容。åƒOmronå…¬å¸å·²ç»å¯Ÿè§‰åˆ°è¿™ä¸€æŠ€æœ¯å‘展的新动å‘，并é€æ¸è®¡åˆ’将其产å“应用于商业器具ã€é¥®æ–™åˆ†å‘设备以åŠå•†ä¸šã€å·¥ä¸šç‰ã€‚这些行业之所以æ£åœ¨åº”用微型PLC，æ£æ˜¯ç”±äºŽå®ƒå…·æœ‰å“越的çµæ´»æ€§ã€å¸‚场开å‘周期çŸã€é€‚应性强ã€ç«žäº‰æ€§çš„ä»·æ ¼ç‰ä¸€ç³»åˆ—优点所至。
对于PLC或者嵌入å¼æŽ§åˆ¶å™¨çš„选择主è¦ä¾èµ–于它们的体积大å°ï¼Œå°¤å…¶æ˜¯å¦‚果需è¦ç‰¹æ®ŠåŠŸèƒ½æ—¶ï¼ŒåµŒå…¥å¼æŽ§åˆ¶å™¨çš„缺陷就é€æ¸æ˜¾éœ²å‡ºæ¥äº†ã€‚尽管嵌入å¼æŽ§åˆ¶å™¨å…·æœ‰å¾ˆä½Žçš„ä»·æ ¼ï¼Œä½†å…¶ä¸ä»ç„¶åŒ…å«äº†è´¨é‡æŽ§åˆ¶ã€ç»´ä¿®ä»¥åŠæœåŠ¡ç‰æ–¹é¢çš„ä»·æ ¼ã€‚
Mitsubishiå…¬å¸çš„FX1S超微型和FX1N微型PLC系列产å“æ£åœ¨é¢å‘嵌入å¼åº”用领域å‘展，它们能够处ç†ä»Ž10-128个I/O通é“，并且具有2个轴å‘çš„è¿åŠ¨æŽ§åˆ¶æ€§èƒ½ï¼Œè¿˜å…·å¤‡PID控制指令应用于连ç»è¿‡ç¨‹æŽ§åˆ¶ã€‚
æ¥è‡ªäºŽEntertronå…¬å¸çš„SK1600-RIC型嵌入å¼å¯ç¼–程逻辑控制器（ePLC）具有16通é“æ•°å—é‡è¾“入和12通é“继电器输出基本å•å…ƒã€ä¸€ä¸ªRS-232接å£ã€ä¸€ä¸ª10kHz高速计数器通é“，以åŠ4kb的程åºå˜å‚¨å™¨ã€‚å¦å¤–，它å¯ä»¥åœ¨Windowså’ŒDOSæ“作系统平å°ä¸‹é‡‡ç”¨æ¢¯å½¢é€»è¾‘图编程方å¼è¿›è¡ŒæŽ§åˆ¶ç¨‹åºè®¾è®¡ã€‚该产å“è¿˜èƒ½å¤Ÿè¢«åº”ç”¨äºŽæœ‰æˆ–è€…æ— æ“作员界é¢çš„连接。
Omronå…¬å¸æœ€æ–°æŽ¨å‡ºçš„CPM2B系列微型控制器，其设计ä»ç„¶ä¿ç•™äº†å·¥ä¸šç”¨æˆ·æ‰€å¸Œæœ›çš„ä½Žæ€§èƒ½ä»·æ ¼æ¯”çš„ç‰¹ç‚¹ï¼Œä»¥ä¾¿å·¥ä¸šç”¨æˆ·èƒ½è‡ªç”±æž„å»ºæŽ§åˆ¶ç³»ç»Ÿã€‚å…¶ç‰¹ç‚¹è¿˜åŒ…æ‹¬æä¾›äº†å¤‡ä»½ç”µæ± ã€å¢žå¼ºåž‹é€šä¿¡æœºåˆ¶ã€I/O通é“å¯æ‰©å±•åˆ°128è·¯ã€RS-232接å£ã€å¯ç§»åŠ¨ç»ˆç«¯ã€PID控制回路以åŠå…¶ä»–高级指令系统ç‰ã€‚
Blue Earth Researchå…¬å¸å·²ç»å°†Xplor-52RæŽ§åˆ¶å™¨å¢žåŠ åˆ°å…¶ä¸ºåµŒå…¥å¼æŽ§åˆ¶åº”用所设计的Xplor系列个人数å—控制器ä¸ï¼Œèƒ½å¤Ÿæ供有é™çš„监控功能和数æ®ä¿¡æ¯è®°å½•åº”用。它能够支æŒXplorç³»åˆ—æ‰€æœ‰æ ‡å‡†ç‰¹ç‚¹ï¼ŒåŒæ—¶åŒ…括了一个89C52 CPUå•å…ƒå’Œç”¨äºŽå˜å‚¨Basic程åºçš„8kbçš„EEPROMå˜å‚¨å™¨ï¼Œä»¥åŠä¸€ä¸ªRS-232接å£ã€‚其他元件包括一个8通é“12ä½A/D转æ¢å™¨ã€ä¸€ä¸ª4通é“12ä½å…·æœ‰æœ‰æ•ˆè¾“出电压范围的D/A转æ¢å™¨ã€ä¸€ä¸ªçœ‹é—¨ç‹—定时器，以åŠä¸€ä¸ªLCD和键盘接å£ã€‚
å二ã€PLC将会æˆä¸ºè¿‡ç¨‹æŽ§åˆ¶é¢†åŸŸå†…的日用å“
仅仅从PLCç³»ç»Ÿä»·æ ¼æ£åœ¨é€æ¸é™ä½Žçš„ç†ç”±è¿›è¡ŒæŽ¨ç†ï¼Œå°¤å…¶åœ¨ä½Žç«¯åº”用方é¢ï¼ŒPLC将会æˆä¸ºè¿™ä¸€é¢†åŸŸçš„日用å“。由于PLC系统最å°æ¨¡ä»¶å•å…ƒçš„ä»·æ ¼ä¹Ÿåªä¸è¿‡100美元，甚至更低，å³ä½¿è¿™äº›æ¨¡ä»¶å‡ºçŽ°æ•…障，工业用户从心ç†ä¸Šå·²ç»æ„Ÿè§‰ä¸åˆ°æ˜¯å¦è¿˜å€¼å¾—é‡æ–°ä¿®ç†ã€‚许多工业用户直接采å–了抛弃出现故障的模件，进而æ¢ä¸Šä¸€å—新模件的处ç†æ–¹å¼ï¼Œå› 为é‡æ–°ä¿®ç†è¿™æ ·çš„故障模件也许会花费åŒæ ·ç”šè‡³æ›´å¤šçš„费用。
相å，我们ä¸è¦è¢«ä½Žä»·æ ¼æ‰€æ„šå¼„。一些å°åž‹ç”šè‡³è¶…å°åž‹PLC系统已ç»å‘工业用户æ供了模拟é‡I/Oã€PID控制回路ã€é€šä¿¡æŽ¥å£ï¼Œç”šè‡³ä¸Žä¼ä¸šç½‘络系统相连接的现场总线。具有14个通é“çš„I/Oå’Œ4个PID控制回路的PLCç³»ç»Ÿï¼Œå…¶ä»·æ ¼æ‰99美元，这ç§äº§å“éžå¸¸é€‚åˆå°ç³»ç»ŸæŽ§åˆ¶åº”用的需è¦ã€‚
一些PLC供应商ä¾æ‰˜å¼ºå¤§çš„应用市场继ç»å‘展å°åž‹PLC产å“，甚至大é‡çš„工业用户已ç»å°†å…¶çœ‹ä½œæ˜¯ä½Žç«¯åº”用市场上的日用å“。PLC供应商需è¦å……分考虑的问题是他们ä¸ä»…ä»…è¦ä¾›åº”硬件产å“，还必须采å–相应的措施为工业用户解决工程师å¯ç”¨çš„组æ€å·¥å…·ã€æ•…障诊æ–技术ã€ç½‘络通信能力以åŠé™¤åŸºæœ¬è‡ªåŠ¨åŒ–ç¡¬ä»¶ä»¥å¤–çš„é™„åŠ è½¯ä»¶åŒ…çš„é€‚ç”¨æ€§èƒ½ã€‚
Rockwellå…¬å¸æœ€è¿‘为其Compact Logix系列产å“å¢žåŠ äº†ä¸€ç§æ–°çš„Compact Logix 5330控制器。该控制器能够与1769系列Compact I/O模件，ä¸è¶…过256个本地I/O测点，å¦å¤–还为用户æ供了256kbå˜å‚¨å†…å˜ã€‚CompactLogix使用了相åŒçš„能åŒæ—¶è¢«ControlLogixã€Flex Logixã€SoftLogixå’ŒRSLogix 5000共享的Logix控制引擎。
Automationdirect.comå…¬å¸ä¸ºå…¶DL05型微型PLC也æ供了个别新版本产å“。D0-05DD-D包å«äº†å…·å¤‡8通é“DC输入和8通é“DC输出的DL05 CPU模件，采用了12/24 V DC电æºä¾›ç”µã€å…·å¤‡6kbçš„å˜å‚¨å™¨ï¼Œå¯åˆ©ç”¨RLL/RLLPlus进行程åºè®¾è®¡ï¼Œè¿˜æ供了一个RS-232程åºå’Œé€šä¿¡æŽ¥å£ã€‚它具有两ç§å¯ç»„æ€å¹¶ç‹¬ç«‹äºŽCW/CCW的脉冲顺åºè¾“出或者æ¥åºï¼Œç›´æŽ¥è„‰å†²è¾“出频率å¯ä»¥è¾¾åˆ°7kHz。æ¤å¤–，D0-05DR-D还æ供了6通é“继电器输出。
Siemenså…¬å¸ä¸ºå…¶SIMATIC S7-200系列产å“推出了采用一ç§æ–°ç±»åž‹CPU的微型PLC系统。新类型CPU为S7-226，该CPU为能够进一æ¥è¿žæŽ¥åˆ°å·¥ä¸šLAN系统或者诸如调制解调器ã€æ‰“å°æœºã€æ¡å½¢ç 阅读器ç‰å¤–å›´è®¾å¤‡ï¼Œç›¸åº”å¢žåŠ äº†ç‚¹åˆ°ç‚¹æŽ¥å£ï¼ˆPPI）或者自由接å£ï¼ˆè¿žç»ASCII）。
æ¥è‡ªäºŽGE Fanuc自动化公å¸çš„一ç§æ–°äº§å“是VersaMax CPUE05 CPU模件。该模件的特点主è¦åŒ…括与Ethernetç‰çš„连接能力ã€æ›´å¿«çš„指令执行时间，以åŠæ›´å¤šçš„用户å˜å‚¨å™¨æ”¯æŒã€‚æ–°å¢žåŠ çš„åŠŸèƒ½åŒ…æ‹¬ä¸€ä¸ª10Base-T连接ã€å…¨åŒå·¥é€šä¿¡æŽ¥å£ï¼Œé€šè¿‡åˆ©ç”¨åˆ‡æ¢å¼€å…³ä»¥ä¾¿æ¶ˆé™¤æ•°æ®ç¢°æ’žçŽ°è±¡ï¼Œå¹¶åŒæ¥è¿›è¡Œå‘é€å’ŒæŽ¥æ”¶æ•°æ®ä¿¡æ¯ï¼›å®ƒè¿˜æ供了64kb用户å¯é…ç½®å˜å‚¨å™¨ï¼Œé‡‡ç”¨RS-232å’ŒRS-485接å£è¿›è¡Œé€šä¿¡è¿žæŽ¥ï¼›å…·å¤‡æœ¬åœ°æ“作员界é¢ï¼›ä»¥åŠå¯é€‰æ‹©ä¸ŽEthernetã€DeviceNetå’ŒProfibus现场总线连接。
Mitsubishi电å自动化公å¸å·²ç»æŽ¨å‡ºäº†æ–°ä¸€ä»£Q系列PLC系统，程åºè®¾è®¡é‡‡ç”¨äº†åŸºäºŽWindows编程软件工具。程åºé€šè¿‡USB接å£è¿›è¡Œä¼ 输。其特点是能够支æŒInternet电å邮件ã€è°ƒåˆ¶è§£è°ƒå™¨å’Œ10/100Mb/s Ethernetï¼›å¯ä»¥è¿žæŽ¥åˆ°DeviceNetã€Profibusã€CC-Linkå’ŒNET/10ï¼›æ¯ä¸ªCPUå¯ä»¥å…许有ä¸è¶…过252个程åºçš„åŒæ¥è¿è¡Œï¼›å¦å¤–，它的体积也是éžå¸¸å°çš„。
CTCå…¬å¸ä¸ºå·¥ä¸šç”¨æˆ·æ供了一套2601自动化æˆå¥—工具，该工具包括增强型2601控制器和基于Windowså¹³å°çš„Quickstep SE程åºå¼€å‘工具软件包，Quickstep SE是该公å¸ç”¨äºŽ2601控制器具有专利的程åºè®¾è®¡è¯è¨€ï¼Œå°¤å…¶èƒ½å¤Ÿæ»¡è¶³éœ€è¦æ•°å—控制和串行通信的å°åž‹åº”用项目的应用è¦æ±‚。为2601所编写的控制程åºåªè¦é€šè¿‡ç›¸åº”的转æ¢å°±å¯ä»¥è¿è¡ŒäºŽå…¶ä»–2000系列CTC控制器上。
一ç§æ–°çš„æ¥è‡ªäºŽIDECå…¬å¸çš„产å“是MicroSmart PLC，在该PLCçš„CPU模件上æ供了10ã€16或者24通é“çš„I/Oã€‚å…¶ç‰¹ç‚¹åŒ…æ‹¬ä¸€ä¸ªæ ‡å‡†çš„ç”µæºä¾›åº”电路ã€4通é“高速计数器ã€ä¸€ä¸ªRS-232接å£å’Œä¸€ä¸ªæ¨¡æ‹Ÿé‡åˆ†åŽ‹è®¡ã€‚具有24通é“I/Oçš„CPU模件也能够与总计ä¸è¶…过88通é“çš„I/O模件一起工作。
æ¥è‡ªifm电å技术公å¸ï¼Œå¹¶å…·æœ‰ä¸€å¯¹AS-I现场总线的主控制器包括两个采用IEC 61131-3æ ‡å‡†ç¼–ç¨‹ä»¥åŠä¾é AS-Iå’ŒRS-485通信的AC 1011 PLC。AC 1011采用了å•ä¸ªæŽ§åˆ¶å™¨æ–¹å¼ï¼Œå…¶I/Oå…许ä¸è¶…过124通é“输入和124通é“输出；而AC 1012则采用了åŒæŽ§åˆ¶å™¨æ–¹å¼ï¼Œå…¶I/O通é“æ•°é‡æ˜¯AC 1011的两å€ã€‚
æ¤å¤–，许多PLC系统已ç»ä¸Žæ“作员é¢æ¿å’Œå…¶ä»–HMI系统一起使用，在有些情况下，PLC的逻辑处ç†åŠŸèƒ½å·²ç»è¢«ç›´æŽ¥é›†æˆåˆ°HMI软件ä¸ã€‚
æ¥è‡ªäºŽB&R工业自动化公å¸çš„B&R PP21/41高级æ“作é¢æ¿è¿›ä¸€æ¥ç»“åˆäº†Compact PLCå’ŒHMIé¢æ¿ç³»ç»Ÿï¼Œå¹¶åº”用于集æˆä½Žä»·æ ¼æœºæ¢°æŽ§åˆ¶å’Œæ“作员界é¢ã€‚它具备700kbçš„SRAMå’Œ1.2MBçš„FlashPROMå˜å‚¨å™¨ï¼Œé‡‡ç”¨äº†åŸºäºŽIEC 61131-3æ ‡å‡†çš„ç¨‹åºè®¾è®¡è¯è¨€ã€ANSI Cå’ŒB&R自动化Basicè¯è¨€è¿›è¡Œç¼–程设计工作。模件å•å…ƒåŒ…括16通é“æ•°å—é‡I/O，所具备的6个å¯åˆ©ç”¨æ‰©å±•æ’æ§½ç”¨äºŽé™„åŠ çš„æ•°å—é‡ã€æ¨¡æ‹Ÿé‡é€šé“扩展以åŠé€šä¿¡I/O模件。串行和CANbus接å£ä¹ŸåŒæ ·è¢«åŒ…å«åœ¨å…¶ä¸ã€‚
EXORå…¬å¸ä¹Ÿå·²ç»é€šè¿‡å°†ä¸€ä¸ªPLCå’ŒI/O模件嵌入到一个å«åšHMIcontrol集æˆç³»ç»Ÿçš„æ–¹å¼æ¥æ‰©å±•å…¶UniOP系列HMIæ“作é¢æ¿ï¼ŒPLC模件完全与其所有UniOP产å“兼容，并使用了相åŒçš„ã€åŸºäºŽWindowså¹³å°ã€ç”¨äºŽæ‰€UniOPæ“作é¢æ¿çš„组æ€è½¯ä»¶åŒ…。
å三ã€ç»“æŸè¯é¢å¯¹æ¿€çƒˆå¸‚场竞争所带æ¥çš„å±€é¢ï¼Œä¼ä¸šåªæœ‰ç´§ç´§æŠŠæ¡å¸‚场è¿è¡Œçš„脉æ，充分结åˆè‡ªèº«çš„特点，é¢å‘世界ç»æµŽçš„大潮，ä¸æ–èžå…¥æ–°æŠ€æœ¯ã€æ–°æ–¹æ³•ï¼ŒæŽ¨é™ˆå‡ºæ–°ã€‚åŒæ—¶ï¼Œéšé˜—PLC供应商的ä¸æ–努力，并进一æ¥åœ¨e-åˆ¶é€ å’Œe-控制技术方é¢å®žçŽ°æ–°çš„çªç ´ï¼Œæ‰€æŽ¨å‡ºçš„新一代PLCå°†èƒ½å¤Ÿæ›´åŠ æ»¡è¶³å„ç§å·¥ä¸šè‡ªåŠ¨åŒ–控制应用的需è¦ã€‚
The final trend of PLC technology exhibition is still one of the focuses of people's debate. Most people think that PLC will continue to lose market share; what is even worse is that in the face of industrial PCs, PLC will go to death step by step; but some people believe that some special industrial applications will still provide certain market share.
In the field of global industrial computer control, great changes have taken place around open and re-open process control systems, open process control software, and open data communication protocols. PLCs are almost everywhere, but this trend may not continue. With the birth and further improvement and development of SoftPLC control configuration software technology, the market share with SoftPLC configuration software and industrial PC control system is gradually increasing. These facts make the traditional PLC suppliers ideologically Dramatic changes have taken place. They must face reality and make a more open and high profile in the development and improvement of traditional PLC technology. For the control software, this is the core of the PLC controller. The PLC supplier is providing open-end programming configuration tool software to industrial users, and it is very active for industrial users. In addition, open communication network technology has also been a breakthrough, the result is to integrate PLC into a more open industrial control industry.
Second, open and based on industrial PC control
PLC manufacturers have begun to watch the impact of industrial PC-based control technology. Some experts even believe that the new technology and open technical specifications brought by the new business activities will bury traditional PLCs. PLC manufacturers believe that although there are a large number of PLC control devices installed on the industrial site, they still need to work with industrial control software companies in order to develop their own industrial PC-based process control software.
It is true that several years ago there was a clear mixture of old and new PLCs in industrial sites. Industrial users had to learn new and old knowledge at the same time, and even learn from each other. Most PLC manufacturers provide only soft logic and an operating platform for industrial users.
In the high-end applications, it is difficult to further distinguish between the PLC control system and the industrial PC control system, because both use the same type of microprocessor and memory chip. Imagery metaphorically, if you forget the literal meanings of industrial PCs and PLCs, then what you can observe in the box is just some basic computer hardware technology. What we observe more is the complexity of those basic technologies. Chemicals and hybrids, these technologies are effectively combined into the control system.
In addition, the reason for adopting open control is the need for system function integration on the one hand, and on the other hand due to the over demanding function of some industrial users. If you can give a high degree of attention, you can get more basic technical knowledge. PLC manufacturers focus on system functionality while industrial users focus on system applications. People can see that the future development trend is to further integrate more functions into a control box. Therefore, events such as sequence control and process control will be handled in a functional manner. Others such as motion control can also be shared in the same control structure system.
It is believed that PLC technology will continue to shift toward open control systems, especially industrial PC-based control systems. The latter in addition to the flexibility in the traditional PLC has a distinctly different advantages, but also has other advantages, such as can shorten the system into the market cycle, reduce system investment costs, improve the efficiency of the data flow from the bottom of the factory to the office automation Wait.
The problem of real-time response to industrial PC control systems has been well resolved. Perhaps the main thing is still hidden behind the technology, but it lacks corresponding tracking records. For PLCs, sturdiness is one of its main features, and there are already quite a number of tracking records to verify. Industrial users still treat the PLC with great care, and they are doing different technical tests on the PLC. When using a new technology, the question that industrial users need to consider is how much risk they have to take, and at the same time it needs to consider how many opportunities and benefits they can bring to their business activities.
However, industrial users do not fully believe the benefits of open control systems. With the further development of technology, they began to dilute these ideas. Industrial users are balancing the risks of adopting new technologies and the benefits of their business activities in order to provide effective protection for future decisions.
Industrial PC technology offers many features that enhance the PLC's features, including built-in video and high-speed floating-point digital coprocessors. Although Microsoft has no plans to further enhance this feature, the new Windows CE 3.0 is fully able to better meet the needs of process control.
Not long ago, Siemens announced a new set of software products based on open control systems, namely version 3.0 of SIMATIC WinAC (Windows Automation Center). WinAC is a control system solution based on Windows NT that is compatible with SIMATIC S7 PLCs and suitable for industrial PCs. WinAC 3.0 offers the connectivity of Profibus fieldbus LANs with higher integration and remote programming. In addition, it provides a new DeviceNet I/O device driver for localized integration of field control devices for connecting to installed DeviceNet I/O devices.
Steeplechase Software has also introduced an embedded Windows NT operating system interface component that supports hard real-time process control. This component further integrates hard real-time control software from Steeplechase's Industrial Compact PCI with SBS technology running in the Windows NT environment. Steeplechase's visual logic controller has now been upgraded to version 5.0. The controller is suitable for Windows NT 4.0 and Windows 2000 operating systems, its real-time engine can be directly integrated with the ordinary Ethernet and TCP/IP. The 5.0 version of the controller utilizes an enhanced OPC server driver and therefore runs faster than previous versions. Other features include new OI network features and the ability to allow industrial users to design rich and colorful dynamic graphics.
Transysoft recently introduced a new version of the ISaGRAF series industrial control configuration package, ISaGRAF PRO, which is a soft logic automation control package based on the IEC 61131-3 international standard and independent of any hardware platform. In a networked process control system environment, the software package can be applied to the development of a variety of configuration and distributed control systems. It contains a set of development tools, application work platforms, and corresponding "virtual machine" runtimes. aims. This runtime target can run on a variety of hardware platforms.
CTC Automation Engineering has released a new set of control software, MachineLogic PCLC (Industrial PC Logic Controller), which allows industrial PCs to play the role of PLC and still maintain the functional characteristics of industrial PCs. The software can complete the control tasks determined by a PLC and is as fast as the program execution time, all within 1 ms. It can also handle multi-task work at the same time, but it cannot exceed 16 control tasks at the same time. A mechanism with a prioritized and multitasking kernel keeps track of each control task, ensuring that control tasks get the highest priority. The software can run all five IEC 61131-3 standard programming languages ​​and PID control programs, supporting two types of I/O control devices. One is fieldbus I/O devices like Profibus and DeviceNet; the other is industrial PC I/O modules like ISA and PC/104. In addition, the software also provides online editing configuration functions for the control system. The program can be developed and run under Windows 95/98 and Windows NT, but it can also be executed under RTXDOS.
SoftPLC also provides Tealware, an industrial control software product that has been vividly described as a PLC wearing an industrial PC suit. The control systems installed on the rack already have the form factor of a small PLC, but SoftPLC's control software has been embedded in the CPU. Tealware software can meet the needs of various types of industrial users, from small, stand-alone systems to large, distributed multi-control workstation applications. Features include a full range of I/O modules, built-in Ethernet, and industrial serial communication interfaces.
Recently, Tealware software has been upgraded to version 2.3. Among them, the control software provides a virtually infinite ladder logic control step, allowing more than one million words of data tables; many OI/SCADA application interfaces; built-in Java engine and FTP server for remote maintenance and management; support User-written C, C++, Java programs, and device drivers; suitable for embedded Web servers; online operation of program design; robust I/O module support capabilities and many other standard PLC functions; Or, the converted AB company's PLC-5, PLC-2/PLC, PLC-3 and SLC-500 programs.
Third, the expansion of Ethernet and further accommodate Web technology
Currently, one of the biggest trends in all process control areas is the expansion of Ethernet technology. The PLC is an exception. Now, more and more PLC suppliers are beginning to provide Ethernet interface components. In the last few years, we have seen that it is a trend to develop a PLC that is more powerful than the existing ordinary XiaoLing PLC. Will Ethernet be the communication standard for PLC? Perhaps the end result is this, but it is still too early. There is a common misconception that providing an Ethernet interface on a PLC will solve all communication problems. Ethernet only defines several layers of protocol standards at the bottom of the OSI reference model. If the upper layer protocols are incompatible with each other, it is still impossible to communicate with each other. For example, this is just like a conversation between a Chinese who does not understand English and an American who does not understand Chinese is not able to make a phone conversation. Therefore, the protocol is the language that the devices communicate with each other.
On the other hand, the pace of progress has already been taken. We only have to face difficulties. In order to apply Ethernet technology to plant floor process control equipment, the ODVA Association has established a set of global standard technical specifications. Ethernet/IP standards to be able to solve the difficulties encountered in the actual work.
One of the things that is close to Ethernet is to be able to connect anywhere you want via the Internet. In fact, in some unexpected places, Web servers are showing their power. A few years ago, some PLC systems had built-in Web servers, which undoubtedly added more features to the PLC system. Other types of control devices are also preparing for further integration with Web servers. For example, Square D Company already has an engine control center with an Ethernet connection interface and is preparing to develop a transmission device with a Web server connection interface.
Benefits of having a built-in Web server body include open networks, business tools, and client/server relationships. In the past, industrial users may have typically asked for some information about PLCs, but now, due to the constant birth and development of new technologies, it is easy for industrial users to get information about this. On the other hand, with the large-scale production of chips and processors, PLC manufacturers can produce and provide open-network products, allowing industrial users to purchase PLC products with excellent functions at a small cost.
Schneider has become one of the pioneers in providing technical support for connecting PLCs to Ethernet and the Web. Recently, the company introduced a new fast Ethernet (100 Mb/s) module that runs on the Premium PLC platform. This module provides a full-duplex auto-sensing 10/100 Mb/s connection speed for PLCs that can connect to TCP/IP. The live process controllers can share real-time data information and automatically scan Momentum I/O modules. Any other field control device based on the Modbus communication protocol uses an embedded Web server to provide HTML communication services while providing SNMP for standard network communication management. At an exhibition, Schneider also showed industrial users their concept of a transparent factory.
In addition, Schneider recently introduced adapters based on Modicon's Momentum MIE family of processors that provide standard IEC program control capabilities, further providing a perfect solution for e-manufacturing. The adapter also provides the ability to connect intelligent I/O systems and other on-site process control devices to the Internet and Ethernet. On-site process control devices include all functional real-time process controllers.
A few years ago, Rockwell Automation also provided Ethernet interfaces in its PLC products and was steadily steadily improving the features of the Ethernet. The company has recently announced a flexible I/O module solution that uses non-patented versions of Ethernet technology to provide real-time process control performance. Type 1756 ControlLogix I/O from AB is also a component based on the standard Ethernet TCP/IP and UDP data transfer protocols. The application layer uses an open, object-oriented, producer/consumer-based technology. This technology can also be found in the ControlNet, DeviceNet and FF fieldbus H1 network systems.
Similarly, many other companies have also introduced Ethernet communication interface modules. For example, the communication interface provided by IDEC's OpenNet PLC controller enables compatibility with fieldbus devices such as DeviceNet, LonWorks, and Interbus. The controller utilizes an Interbus remote I/O master card that can handle no more than 480 local I/Os and 512 remote digital I/Os.
The 8051 industrial communications bridge provided by Sierra provides a good integration of PLC, DCS, RTU and SCADA systems that are incompatible with each other. This industrial communication bridge enables high-speed network applications over RS-232, 422, 485, or Ethernet communication links. The bridge controller provides eight RS-232 serial communication interfaces, two RS-485/422 isolated serial communication interfaces, two 10Base-T Ethernet interfaces, and one connection for redundant hot standby bridges Device.
The multi-vendor interface kit from ProSoft provides serial communication capabilities for AB's PLC, SLC, ControlLogix, and FLEX I/O (including the 1771, 1746, 1765, and 1794) platforms. Each module contains an 80386 processor and is embedded with a DOS operating system. Therefore, it can be considered as an industrial PC with I/O capability. In addition, the controller also has an "A>" disk operation prompt. , as well as the Autoexec.bat and Config.sys files. Applications can range from simple ASCII communications to sophisticated 32-bit control algorithms.
Another company, Giddings & Lewis, who is usually involved in motion control research, has also added Ethernet TCP/IP interfaces to its line of motion control products for the PiC (Programmable Industrial Control) and MMC (Mechanical and Motion Control) series. These unit components provide the ability to connect to the factory's internal Intranet and the Internet, allowing data information to be shared between on-site process controllers. Between on-site process controllers and industrial PCs, OPC server device drivers are usually used to connect real-time data information, and Ethernet network systems and Web technologies can be used for remote file transfer, program design, and system maintenance.
Nowadays, more and more companies are planning to gradually connect all their automation control devices to enterprise-wide information systems. For industrial users, perhaps they have noticed the Ethernet for Control series of control solutions, the technology is more dependent on Ethernet and the Internet. Almost all PLC vendors provide Ethernet connectivity in some of their serialized products, and some companies have already decided to completely embed Web servers inside their devices in order to fully demonstrate the performance characteristics of the PLC. Utilizing the Web connection feature of PLC, industrial users can not only monitor the operation status of the control system from anywhere, but also obtain any required data information just like the system manual.
Of course, if industrial users are starting to connect their control systems to the Internet, a secure information release address must be set up for this purpose. In addition, in order to prevent hackers from entering the control system, a set of firewall software with good security performance must also be installed.
SoftPLC has invested a great deal of enthusiasm and interest in network security. They have embedded a real-time and deterministic Java virtual machine into the process controller. Java makes it possible not only to run Web-based Active X control objects, but also to run Servlets. Servlets are highly integrated Web server tasks that provide dynamic Web page content. Servlets program code is clearly visible, object-oriented design, modularization, development is very simple and clear, Servlets also provide data information security performance, allowing further restrictions on real-time data information, such as only selected industrial users, or selected Registered data information. If the process controller is effectively connected to the Internet, then security is very important to it.
Hacking is not the only annoyance. If the network system is paralyzed, what do we need to do first? Hacking solutions use redundancy. Redundant IP addresses, redundant network systems, redundant communication cables, and hot backups are used in the process controller to provide good service for the process control system when an emergency occurs.
Many PLC suppliers continue to improve and improve communication performance during the development of their products. Their development direction is mainly oriented to Ethernet technology and Web-based technology.
Omron provides full Ethernet connectivity in its products. With its TCP/IP data transfer protocol, its products are fully compatible with all Ethernet specifications. In addition, the company recently released several new products based on Profibus-DP. The CS1 controller platform provides the operating characteristics of the main unit components to allow all process controller devices on the Profibus-DP network to run on the production platform; a new set of Sycon-DP configuration tool packages is also provided. Allows industrial users to easily configure the process control system and delegate the management of the network; in addition, a new multi-I/O terminal can be used as a Profibus-DP slave unit, which provides an interface for communication units. For connecting one or more I/O module units, there are Ethernet specifications. In addition, the company recently released several new products based on Profibus-DP. The CS1 controller platform provides the operating characteristics of all process controller devices on the Profibus-DP network that the master unit components allow to establish on the platform; it also provides a new set of Sycon-DP configuration tool packages. Allows industrial users to easily configure the process control system and delegate the management of the network; in addition, a new multi-I/O terminal can be used as a Profibus-DP slave unit, which provides an interface for communication units. Connecting one or more I/O module units works well with the company's C200H series PLCs.
Rockwell Automation also actively adds support for Ethernet connectivity in its products, including the Ethernet/IP, FLEX I/O, MicroLogix, and PanelView family of products specifically for ControlLogix. Similar products include ProcessLogix, PLC, and SLC 500 process controller families. Through further improvement and improvement, its products can simultaneously support the transmission of both implicit and explicit data information. With the help of implicit data information transmission methods, its data fields only contain real-time I/O data information.
The ControlLogix Ethernet/IP lineup includes an Ethernet/IP bridge module, an Ethernet/IP communication interface module, RSLinx software packages, and an Ethernet/IP communications interface transceiver. The FLEX I/O network interface module is suitable for Ethernet/IP, including a 10/100 Mb/s Ethernet/IP, including a 10/100 Mb/s Ethernet/IP fiber adapter. For MicroLogix, CompactLogix, SLC500 process controllers and other process control devices utilizing the DF1 protocol, the 1761-NET ENI Ethernet interface is supported for explicit data information transfer.
Automationdirect.com has introduced a new Ethernet Remote Master Module (H2-ERM) for its D2-240 and D2-250 PLCs. This new module connects the local CPU base unit to the remote slave I/O subsystem via a high speed Ethernet link. Each module can support 16 additional DL205 module units, 16 terminator I/O subsystems, 4 fully extended DL405 subsystems, or a mixture of any of these three types. Subsystems connected using Category 5 UTP cables must not exceed 100m between them. Repeaters can be used to extend the transmission distance and the number of nodes. If optical fiber transmission media is used, the distance can reach 2000m.
Advantech recently introduced the WebLink 2040/SDA product, which embeds Web server software that allows any machine, process controller, and smart sensor to be connected to the Internet or Intranet with Web-based HMI-SCADA software. The product also allows industrial users to securely access real-time data information from anywhere in the world via the Internet to monitor and control any on-site process equipment or system. In addition, through the company's Advantech Studio suite of software, industrial users can convert real-time, live graphics, trend records, alarm logs, reports, and recipes to a standard browser, anytime, anywhere.
Another type of Web server module from Newport Inc. is iServer, which makes it possible to connect existing PLCs and other control devices to the Internet. This DIN rack-mounted modular unit allows no more than 32 control devices with serial communication interfaces to connect to Ethernet and the Internet, acting as a Web server and an RS-232, 422, 485-compatible Ethernet serial bridge.
However, not all PLC communication performance improvements are for Ethernet or Internet. Not long ago, Rockwell Automation announced a new version for ControlNet and applies to AB's PLC-5C field controllers and SLC 500 adapter modules. The deterministic and nondeterministic network connectivity features provided by the 1747-ACN15 and 1747-ACNR15 adapter modules for SLC (1746) I/O are now fully compatible with their PLC-5C field controllers.
Moeller Electronics previously used a proprietary communications protocol and has now begun to move toward open network protocols. Their new generation of I/O structure called XI/ON will become an integral part of its PLC development. With this architecture, fragment and modular design work is possible. The integrated gateway allows connection to Ethernet, Profibus-DP, DeviceNet, CANOpen, and more network systems.
The enhancement of PLC-related communication performance is not only reflected in hardware but also fully reflected in software. For example, KEPware Corp. has introduced a new generation of 32-bit Control-Logix Ethernet OPC server drivers for its KEPserverEX family of products. The OPC driver software improves the speed and connectivity between OPC and DDE customers and AB's ControlLogix field controllers; it also provides a flexible human-machine interface; you can freely use AB's OPC server suite. It also includes the PLC5/SLC505 Ethernet driver. It also further optimized the 1756's ENET interface, improved communication performance, and supported the company's automated identifier database.
Fourth, process control applications
Although traditional PLCs have been applied in the field of discrete process control, PLCs have been widely used in the field of continuous process control, and the development trend based on continuous process control technology is further growing. Communication is a key technology for PLC applications. This technology has been expanded in the PLC field. As with systems, decentralized processing of PLCs has become possible, so it is easier to manage them so that they can be better integrated.
Facing the enormous competitive pressures existing in the traditional industrial process control market, many PLC suppliers are beginning to actively transfer the process control applications they serve, and must abandon some of the market share that traditional PLC applications already occupy.
After a short period of hard work, Siemens rolled out its PLC products based on process control, introduced SIMATIC PCS products before 1990, and upgraded their products to PCS in 1997. This development work has continued We are satisfied with Siemens, but with the constant birth and development of various new technologies, the development work will not stop. Although both discrete and continuous process control applications use the same hardware products and network systems, additional special modules may be needed, but there are always some differences between them. As long as different types of application software are loaded into the same system, different process control applications can be completed.
Any PLC supplier will continue to concentrate on the research and development of batch and hybrid process control. As a good example, Schneider Automation just brought us its QPC (Quantum Process Control) product, which enables a control system to be truly fully targeted in the field of process control. QPC uses a networked distributed PLC system to complete process control applications. Based entirely on Quantum PLCs and Momentum I/O operating platforms, QPC can scale from a single Quantum PLC to a distributed system and can also be fully integrated with Ethernet, Internet, and TCP/IP technologies.
Rockwell Automation plans to further enhance the process control performance of AB's ControlLogix multifunction controller while adding a redundant set of solutions and flow meter modules. Its 1756-CFM configurable flow meter module will provide the ability to support two channel 0-120 kHz frequency inputs and accept input signals from most turbine or mass flow meters. In version 6.0 of RSLogix 5000, both the function block diagram (FBD) and the process control instruction table will be provided. Its ControlLogix platform also integrates RSView's visual HMI software components. In ControlLogix, ActiveX panel display controls work with process control instruction tables and provide the perfect picture display for process control applications based on RSView. In addition, its RS series batch control applications also provide integrated S88 batch processing capabilities.
Toshiba Corporation has released its V-Series integrated process controller that can further integrate PLC systems, DCS, and work to control computers. Its main features include: providing a common set of configuration engineer toolkits for all three operating platform modes; providing a common backplane bus architecture for any combination of sequence controllers, loop controllers, and computer modules; Provides a common identifier database for global process variables and Windows NT 4.0; also provides a common set of Ethernet-based LAN network systems. The controller programming language is compatible with the IEC 61131-3 standard. Its Web connectivity capabilities help industrial users remotely configure, find and repair faults and other engineering activities.
The Siemens PLS 7 process control system was originally based on the SIMATIC S7-400 PLC and has recently been upgraded to version 5.0. One of its greatest features is a flexible distributed server/multi-client architecture that perfectly combines open bus architectures. Communication protocols based on Profibus and HART fieldbus are widely used for field control device integration; Profibus fieldbus, industrial Ethernet, TCP/IP are used for system bus; Ethernet TCP/IP and Fast Ethernet are used for terminal bus and enterprise integration Connection.
Similarly, Rockwell Automation has also introduced an enhanced ProcessLogix decentralized control system. Subsequently, it announced its FlexLogix decentralized control system, which contains the 5430 FlexLogix controller and existing Flex I/O control equipment products. The Model 5430 controller and AB's ControlLogix multifunction controller use the same process control software package RSLogix 5000 as Rockwell Automation.
Rockwell Automation's ControlLogix 5550 multifunction controller has added 3 new instructions to meet the needs of motion control, and has also added two new coordinate types. By allowing RSLinx software to receive all identifier data lists with a single request command, network data throughput is greatly improved. In addition, the OI tool now has a graphical interface that allows for the monitoring of trend chart and histogram values, adding a system browsing tool.
In the PPC-2000 hybrid temperature controller introduced by Watlow Anafaze, multi-loop PID control function and programmable logic control function are integrated in the same process control software package, with 48 PID loops and 48 digital I /O point ability.
Moore introduced the Internet-based control system, Procidia, specifically designed for process control. The system is controlled by Internet technology, Procidia. The system uses local and remote operations and controls through the Internet and intranets of an enterprise, using self-configuration methods based on industrial PCs HMI and OPC server.
VMIC brought the industrial PC-based controller VMIPC-8400, which also embeds the corresponding IOWorks process control software package. The VMIPC-8400 complies with the IEC 61131-3 international standard and is ideally suited to the needs of continuous process control and PLC applications.
V. Redundancy features
In the field of industrial process control, the demand for products with higher reliability systems has been increasing year by year, the vast majority of which are driven by economic interests. The cost of a factory downtime loss is extremely expensive, and the resulting production costs increase. Especially in Europe, the main body of a series of rules and regulations is gradually being improved and strengthened. The IEC 61508 standard now published provides a design basis for the safety performance of the process control system, which is mainly formulated for the functional safety design within programmable electronic systems.
PLC has been used for a long time in the field of safety shutdown system. Perhaps Triconex and Pilz can provide us with many insights about this application, but other PLC suppliers are also looking at the prospects of this application area, but also make some PLC hardware suppliers feel very tricky. SoftPLC has introduced a solution for a redundant system to meet this application requirement and has also been applied in practical projects. Its application experience tells us that the main secret lies in the careful selection of hardware and unique I/O structure, and they also find some bus systems suitable for the application in this field and other unmatched things.
Other well-known PLC suppliers have recently provided corresponding products for safety and redundancy applications. Rockwell Automation has just launched the Guard PLC 1200 and 2000 series of safe process controllers and, along with its existing PLC system, provides monitoring and regulating safety operations for all automation systems. The process controller contains a redundant CPU system and uses internal test circuitry to check the operation of the I/O modules instead of directly using redundant I/O modules. The system complies with the IEC 61508 standard safety technology specification and is also accredited by the TuV product service organization. It can be fully applied to automated process control applications with SIL 3 safety level requirements.
Rockwell Automation also adds redundancy options to industrial users in its ControlLogix platform. A new software component is suitable for the 1757-SRM system redundancy module in order to make the appropriate choice. It can use RSLogix 5000 programming software to form a redundant system with other modules and use standard components such as power supplies, chassis, and ControlNet bridges.
Schneider Automation offers industrial customers a choice of Quantum family hot backup solutions for critical applications. When similar data information passes through the Quantum family of remote I/O processors, the host processor and data information it connects to needs to pass back and forth between the check link and the processor itself. The hot standby processor can monitor the addresses of the Modbus TCP/IP, Modbus+, and Modbus communication interfaces, so the control transmitter for client computer communications is explicitly transmitted.
Triconex recently announced a series of new products. Including a new version of the Trident triple modular redundancy controller that can be used in small application systems up to 450 measuring points, its features include an analog output module, a pulse input module and an enhanced communication function In addition to modules, it also includes off-the-shelf analog inputs, digital inputs/outputs, and solid state relay output modules. In addition, the controller is also fully compatible with the OPC connection specification, at the same time it is certified by the Tuv Rheinland organization and meets the SIL 3 safety level requirements, and also complies with the DIN AK 6 level installation specification.
Triconex also introduced a new version of TRICON 2003 PLC. Its main feature is that the digital processor is more than twice as fast as the original version.与以å‰çš„版本相比，TRICON 2003 PLCåŒæ ·å…¼å®¹OPC连接技术规范。
Siemenså…¬å¸å·²ç»å¼€å§‹ç§¯æžä¸»åŠ¨ä»‹å…¥è¿™ä¸€åº”领域，并åŠæ—¶æŽ¨å‡ºäº†SIMATIC S7-400F产å“。该产å“属于其高端S7-400 PLC的一个具有自动ä¿å®‰è£…置的版本，主è¦ç›®çš„是为安全åœæœºç³»ç»Ÿåº”用而设计的。它能够满足IEC61508æ ‡å‡†æ‰€åˆ¶å®šSIL 3安全ç‰çº§çš„è¿è¡Œè¦æ±‚。如果有临界应用情形å‘生，控制器能够进入到用户定义的安全状æ€ï¼Œä»¥ä¾¿æŒ‰ç…§é¢„定的顺åºæ‰§è¡Œåœæœºç¨‹åºï¼ŒéšåŽå°±å¯ä»¥å‘工业用 户æ供诊æ–æ•°æ®ä¿¡æ¯æŠ¥å‘Šã€‚系统程åºç”±SIMATIC STEP 7通用开å‘环境æ¥å®Œæˆï¼Œè¯¥å¼€å‘环境为工业用户æ供了程åºæ¨¡å—库和安全功能模å—。
GE Fanucå…¬å¸åŽ»å¹´å°±å·²ç»æŽ¨å‡ºäº†åž‹å·ä¸ºMax-ONçš„çƒå¤‡ä»½å†—ä½™è½¯ä»¶ï¼Œè¯¥è½¯ä»¶è¢«åº”ç”¨äºŽæ ‡å‡†ç³»åˆ—90-30 PLC系统，通过Genius LAN通信网络，远程I/Oå½¼æ¤ä¹‹é—´å¯ä»¥è¿›è¡Œé€šä¿¡ã€‚软件由å³æ’å³ç”¨åž‹å程åºç»„æˆï¼Œä»¥ä¾¿è¿›ä¸€æ¥å®Œæˆè¯¸å¦‚å˜é‡åŒæ¥ã€å†—ä½™I/O总线控制ã€ç¨‹åºç‰ä»·æµ‹è¯•ã€ä¸»CPU的挑选以åŠé«˜çº§è¯Šæ–ç‰ä¸€ç³»åˆ—任务。
å…ã€è¿åŠ¨æŽ§åˆ¶
PLC在è¿åŠ¨æŽ§åˆ¶é¢†åŸŸçš„应用也已ç»æœ‰å¾ˆé•¿ä¸€æ®µæ—¶é—´äº†ï¼Œè€Œä¸”还ä¿æŒäº†å¾ˆå¥½çš„增长趋势。
最近，Automationdirect.comå…¬å¸è®¡åˆ’为其DL205 PLC推出具有四通é“高速计数器的H2-CTRIO模件。该模件å•å…ƒæ”¯æŒ4个独立å¯ç»„æ€çš„100kHz计数器/定时器通é“，还具备4个隔离高速DC输出通é“，并è¿è¡ŒäºŽç‹¬ç«‹çš„CPU扫æ程åºï¼Œä½¿å…¶å…·å¤‡äº†éžå¸¸å¿«é€Ÿçš„å“应能力。该模件也能够通过本地基于计数事件的处ç†å™¨è¿›è¡Œç¼–程，而ä¸éœ€è¦ä»ŽæŽ§åˆ¶CPUä¸å¾—到任何å助。程åºè®¾è®¡é€šå¸¸é‡‡ç”¨DirectSoft32å’ŒThink & Do工控组æ€è½¯ä»¶åŒ…æ¥è¿›è¡Œã€‚
结åˆæœºæ¢°å’Œè¿åŠ¨æŽ§åˆ¶æ–¹é¢çš„内容，Giddings & Lewiså…¬å¸æ供了基于工业PCçš„MMC（机械与è¿åŠ¨æŽ§åˆ¶ï¼‰è½¯ä»¶äº§å“PiCPro for Windows，该软件兼容于IEC 61131-3æ ‡å‡†çš„æ¢¯å½¢é€»è¾‘å›¾å’ŒåŠŸèƒ½æ¨¡å—图表程åºè®¾è®¡æ–¹å¼ã€‚该软件内è—于PCI总线模件ä¸ï¼Œå½“宿主工业PCåœæœºä»¥åŽï¼Œè¯¥æ¨¡ä»¶å•å…ƒèƒ½å¤Ÿç»§ç»è¿è¡Œæ“作。其特点包括ä¸è¶…过32个轴å‘的模拟é‡æŽ§åˆ¶æˆ–者SERCOS伺æœç³»ç»ŸæŽ§åˆ¶ï¼Œå…·å¤‡è¿åŠ¨æŽ§åˆ¶æ€§èƒ½ï¼Œå†…è—OPCæœåŠ¡å™¨é©±åŠ¨ç¨‹åºã€ç”µåé‚®ä»¶å’Œæ–‡ä»¶ä¼ è¾“å™¨ï¼Œä»¥åŠä¸ºDeviceNet或者Profibusæ供的通信接å£ï¼Œå¦å¤–还æä¾›äº†æ ‡å‡†Internetå’ŒIntranet访问工具。
七ã€è½¯ä»¶å·¥å…·
现在，软件工具继ç»æˆä¸ºPLC用户最感兴趣的内容之一。对于PLC硬件，工业用户åªéœ€è¦å…³å¿ƒå…¶æ€§èƒ½å’Œä»·æ ¼æ–¹é¢çš„内容å³å¯ã€‚当å‰ï¼Œè¶Šæ¥è¶Šå¤šçš„PLC用户希望能够寻找到更多的软件工具和集æˆå·¥å…·ï¼Œä»¥ä¾¿èƒ½å¤Ÿè¿›ä¸€æ¥æ高PLC硬件的性能。
工业用户所有工作的目的在于实现系统集æˆï¼Œæ‰€ä»¥ä»–们æ£åœ¨åŠªåŠ›å®žçŽ°å°†è¿åŠ¨è½¯ä»¶åŒ…ã€PLCã€æ“作员界é¢ç”šè‡³Internet结åˆåœ¨ä¸€èµ·ã€‚åŒæ—¶ï¼Œå·¥ä¸šç”¨æˆ·è¿˜å¸Œæœ›å¼€æ”¾æŽ§åˆ¶èƒ½å¤Ÿå®Œæˆé€»è¾‘控制，也能够è¿è¡ŒJava脚本程åºã€‚
然而，问题在于工业用户通常是通过è´ä¹°PLC硬件产å“çš„æ–¹å¼æ¥å…费获得软件工具的。如果工业用户打算支付软件费用，他们希望花åŒæ ·çš„费用能够è´ä¹°åˆ°ä¸Žå¸‚场上质é‡ç›¸åŒçš„PC软件。软件供应商也æ£åœ¨åŠªåŠ›å¼€å‘，并希望能够为工业用户æ供更多软件工具的选择机会。
Rockwell自动化公å¸æ供了基于RSLogix系列版本的袖ç型软件RS-PocketLogix，该软件è¿è¡Œåœ¨åŸºäºŽWindows CEæ“作系统平å°çš„袖ç型计算机上，用于工厂底层SLC-500å’ŒMicroLogixå¯ç¼–程控制器的维护和故障处ç†ï¼Œæ”¯æŒPLC-5和所预定的ControlLogix逻辑控制程åºã€‚
现在，Rockwell自动化公å¸å·²ç»å°†è½¯ä»¶å‡çº§åˆ°RSLogix 5000系列版本，该系列软件版本采用了ControlLogix结构体系和Logix 5550处ç†å™¨ã€‚RSLogix系列版本软件其自身已ç»å‡çº§åˆ°4.0，æ¤å¤–，借助于对AI系列入å£å‘½ä»¤ã€æ”¹è¿›çš„安全性能和有效性对比，以åŠä¸€ç§æ–°åœ°å€å‘导的支æŒï¼Œèƒ½å¤Ÿæ”¯æŒABå…¬å¸çš„PLC产å“和个别改进程åºã€‚
Nematronå…¬å¸ä¹Ÿå·²ç»å‘布了5.40ç‰ˆæœ¬çš„å·¥ä¸šè‡ªåŠ¨åŒ–å¥—è£…è½¯ä»¶ï¼Œè¯¥è½¯ä»¶å¢žåŠ äº†åœ¨çº¿é€»è¾‘æŽ§åˆ¶å˜æ›´ã€æµç¨‹å›¾è¡¨è·Ÿè¸ªç‰åŠŸèƒ½ï¼Œå…è®¸å·¥ä¸šç”¨æˆ·çœŸå®žåœ°è·Ÿè¸ªé€»è¾‘æŽ§åˆ¶è·¯å¾„ï¼Œå¢žå¼ºæŠ¥è¡¨å’Œç¼–è¾‘èƒ½åŠ›ï¼ŒåŒ…æ‹¬æ ‡è¯†ç¬¦äº¤å‰æœç´¢å’Œæ‰€æœ‰æŠ¥è¡¨æ‰“å°ç‰ã€‚为æµç¨‹å›¾è¡¨å¼€å‘所增强的编辑功能包括全程æœç´¢ã€æ ‡è¯†ç¬¦å称的替æ¢ã€è‡ªé€‚应æµç¨‹å›¾è¡¨æ¨¡å—，以åŠæ”¹è¿›çš„剪切和粘贴性能，以便有能力将注释性内容嵌入到æµç¨‹å›¾è¡¨æ¨¡å—ã€‚æ–°ç‰ˆæœ¬è½¯ä»¶ä¹Ÿå¢žåŠ äº†å¯¹OPC 2.0的支æŒèƒ½åŠ›ï¼ŒåŒ…æ‹¬æ ‡è¯†ç¬¦æµè§ˆå’Œæ•°æ®ä¿¡æ¯è®¿é—®ç‰ã€‚
Siemenså…¬å¸çš„SIMATIC STEP 7是一套全开放专业版软件，并已ç»æˆä¸ºè¯¥å…¬å¸é€šç”¨å¼€å‘环境软件工具，直接用于组æ€ã€ç®¡ç†å’Œç»´æŠ¤å·¥åŽ‚范围内的自动化控制系统。该软件使工业用户å¯ä»¥å°†ä¸€ä¸ªè‡ªåŠ¨åŒ–工程项目å†ç»†åˆ†æˆè®¾è®¡é˜¶æ®µã€æ‰§è¡Œä¸Žæµ‹è¯•ã€å§”托与å¯åŠ¨ã€è¿è¡Œï¼Œä»¥åŠç»´æŠ¤ç‰ï¼Œç„¶åŽï¼Œå°†æ‰€æœ‰å·¥ä½œé›†æˆåœ¨å•ä¸ªè½¯ä»¶åŒ…内。å•ä¸ªè‡ªåŠ¨åŒ–工程项目å¯ä»¥é‡‡ç”¨è®¸å¤šç¨‹åºè®¾è®¡è¯è¨€çš„任何组åˆæ¥è¿›è¡Œç¼–程工作，从而在其ä¸é€‰æ‹©æœ€é€‚åˆäºŽæ‰€ç»™å®šåº”用程åºçš„那一部分。åŒæ ·çš„程åºä»£ç 能够在基于工业PCçš„SIMATIC WinAC控制系统ä¸å¾—到è¿è¡Œï¼Œä»¥æ»¡è¶³è½¯ä»¶å’Œç¡¬ä»¶å¯¹å®žæ—¶æ€§çš„è¦æ±‚。
ä¸ä¹…以å‰ï¼Œæ–°åˆå¹¶æˆç«‹çš„Entivityå…¬å¸å·²ç»å‘布了Think & Do Live软件。该软件是一套基于e-控制方案的产å“，并集æˆäº†æŽ§åˆ¶ã€é€šä¿¡å’Œä¿¡æ¯æŠ€æœ¯ï¼ŒåŒæ—¶ä¹Ÿæ˜¯ä¸€å¥—能够æ高生产效率的现代化软件工具。该软件所内è—的机械和过程监控功能能够与å¯æ“作的信æ¯æ˜¾ç¤ºç»“åˆèµ·æ¥ï¼Œä»¥ä¾¿è¿›ä¸€æ¥æ高生产效率。该软件还能够被应用作为综åˆæŽ§åˆ¶ã€é€šä¿¡å’Œç›‘控系统的解决方案，或者应用于é—ä¼ ç®—æ³•æŽ§åˆ¶ç³»ç»Ÿã€‚
åŒæ ·ï¼ŒAutomationdirect.comå…¬å¸ä¹ŸæŽ¨å‡ºäº†æ–°ç‰ˆæœ¬çš„基于工业PC的过程控制软件包，现在，该软件包包括了全套OPC 2.0兼容æœåŠ¡å™¨ï¼Œä»¥åŠå¯¹RUNtime PCå’ŒWinPLC的完全性支æŒèƒ½åŠ›ã€‚
Schneiderå…¬å¸æŽ¨å‡ºå…¶Modsoft系列产å“的新一代软件ProWORX Nxt，该软件为Quanturn〠Compactå’ŒMomentum PLCç‰æµè¡Œç¡¬ä»¶äº§å“å¹³å°æ供了基于Windowsæ“作系统的图形化用户界é¢ï¼Œä¹Ÿæ供了与984系列产å“兼容的梯形图逻辑编辑器，为编程é¢æ¿å’ŒPLC之间æ供了直接或者网络方å¼ååŒå·¥ä½œçš„连接选择。å¦å¤–，它还支æŒModbusã€Modbus+å’Œä¾é Ethernet TCP/IPå议的局域网连接方å¼ã€‚其他特点包括组æ€çŽ¯å¢ƒä¸çš„最新型图形化用户界é¢ã€æ”¹è¿›åž‹æ–‡æ¡£ï¼Œä»¥åŠæ”¯æŒæ‰€æœ‰æ¢¯å½¢å›¾å’Œæ–‡æ¡£ä¹‹é—´è½¬æ¢çš„实用程åºã€‚
最近，Giddings & Lewiså…¬å¸ä¸ºå·¥ä¸šç”¨æˆ·æ供了一套集æˆäº†IEC 61131-3æ ‡å‡†é€»è¾‘å’Œè¿åŠ¨æŽ§åˆ¶ç¼–程环境的软件产å“，å³PiCPro for Windows。该软件产å“将所有特点集æˆåœ¨ä¸€ä¸ªå·¥ç¨‹é¡¹ç›®ç®¡ç†å™¨ä¹‹ä¸ï¼Œå¯ä»¥åœ¨çº¿å¼€å‘用户帮助信æ¯ï¼Œè¿˜å¯ä»¥é€šè¿‡Internet进行程åºè®¾è®¡ï¼ŒåŒæ—¶æ”¯æŒSERCOS系列è¿åŠ¨æŽ§åˆ¶äº§å“。
自从所有编程方å¼è¢«è½¯ä»¶å·¥å…·æ›¿ä»£ä»¥æ¥ï¼ŒPLC编程软件已ç»å‘ç”Ÿäº†æ ¹æœ¬æ€§çš„å˜åŒ–，而且这些软件工具ä»ç„¶ä¿æŒç€ä¸€å®šçš„增长趋势，并且ä¸æ–有适åˆäºŽå„ç§åº”用的新特点诞生。
Siemenså…¬å¸æŽ¨å‡ºçš„3.2版本STEP 7-Micro/Win 32程åºè®¾è®¡è½¯ä»¶æ供了一ç§æ–°çš„FBD编辑器，以åŠä¸ŽIEC 61131-3æ ‡å‡†å…¼å®¹çš„æ¢¯å½¢å›¾ç¨‹åºè®¾è®¡è¯è¨€å’ŒFBD。该软件能紧密地与Windowsæ“作系统集æˆåœ¨ä¸€ä¸°æ”¶ï¼Œæä¾›è¯¸å¦‚å¢žåŠ /移动程åºå’Œå®šåˆ¶å®‰è£…æ–¹å¼ç‰ä¸€ç³»åˆ—功能特性。åŒæ ·ï¼Œåœ¨Windowsä¸é‡‡ç”¨å•ä¸ªå·¥ç¨‹é¡¹ç›®æ–‡ä»¶çš„æ–¹å¼æ›´åŠ 容易对工程项目进行管ç†ï¼Œå¦‚电å邮件和备份ç‰ã€‚å¦å¤–它还æ供了新的ä¿å˜æ–¹å¼é€‰æ‹©ï¼Œåªè¦åŒå‡»å·¥ç¨‹é¡¹ç›®æ–‡ä»¶å°±èƒ½å¤Ÿè‡ªåŠ¨å¯åŠ¨å·¥ç¨‹é¡¹ç›®ã€‚
SoftPLCå…¬å¸æ£å¥½ä¹Ÿå‘布了TOPDOC NexGen（被称为下一代）软件。TOPDOC是一个梯形图逻辑程åºç¼–辑器和用于SoftPLC开放结构体系控制软件与过程控制器的维护工具。该软件采用了Java程åºè®¾è®¡è¯è¨€è¿›è¡Œå¼€å‘，其主è¦ç‰¹ç‚¹æ˜¯å……分采用了Web技术，从一个Webæµè§ˆå™¨ä¸Šå°±å¯ä»¥è¿›è¡Œè¿œç¨‹ç›‘控和修改PLCå‚数，而且能够è¿è¡Œåœ¨Windowså’ŒéžWindowsæ“作系统平å°ä¸Šï¼Œå¦‚Linux。
Altersyså…¬å¸å’ŒIndusoftå…¬å¸è¿›ä¸€æ¥è”åˆèµ·æ¥ï¼Œåˆ†åˆ«æŽ¨å‡ºäº†åŸºäºŽAltersyså…¬å¸ISaGRAF系列的Virgo自动化套装软件，以åŠåŸºäºŽIndusoftå…¬å¸çš„Web工作室。Virgo套装软件能够嵌入到Windows CEä¸ï¼Œå¹¶é€šè¿‡Internet与其他过程控制系统建立起通信链路。借助于ISaGRAF系列产å“å’ŒIEC 61131-3æŠ€æœ¯æ ‡å‡†ï¼ŒVirgo套装软件包括了自动化过程控制系统（嵌入å¼æˆ–者éžåµŒå…¥å¼ï¼‰ç»„æ€å’Œè¿è¡Œæ‰€å¿…需的软件部件，如HMIã€æŠ¥è¦ã€äº‹ä»¶è®°å½•ã€è¶‹åŠ¿è®°å½•ã€ç¡¬å®žæ—¶æŽ§åˆ¶å’Œé€šä¿¡ç‰ã€‚
å¦å¤–一ç§æ¥è‡ªäºŽIPMIå…¬å¸çš„基于Java技术开å‘的软件产å“是EPS for Java，该软件é‡æ–°å¼€å‘了新版本的图形化继电器梯形逻辑组æ€ç¼–辑器。由于该软件基于Java程åºè®¾è®¡è¯è¨€ï¼Œå› æ¤æ˜¯ä¸€ä¸ªäº¤å‰è¿è¡Œå¹³å°ï¼Œç›¸åŒçš„æ‹·è´å¯ä»¥è¿è¡Œåœ¨Windows 95/98ã€Macintosh或者其他æ“作系统平å°ï¼Œå¹¶åŒæ—¶æ”¯æŒJavaè¿è¡ŒçŽ¯å¢ƒã€‚
Entivityå…¬å¸æœ€è¿‘å‘布了版本å·ä¸º6çš„Think & Do Studio软件产å“。该软件产å“是建立在VisioæŠ€æœ¯åŸºç¡€ä¹‹ä¸Šï¼Œå¹¶åœ¨ä¸€ä¸ªæ ‡å‡†å¼€å‘环境ä¸é›†æˆäº†æµç¨‹å›¾è¡¨æŽ§åˆ¶é€»è¾‘ã€HMIã€è¿åŠ¨æŽ§åˆ¶ã€PID回路控制ã€æ™ºèƒ½åŒ–I/O控制设备接å£ï¼Œä»¥åŠå·¥ç¨‹é¡¹ç›®æ–‡æ¡£å·¥å…·ã€‚该软件å¯ä»¥å®Œå…¨å‡çº§å¹¶è·¨è¶ŠMicrosoft Windowså¹³å°ï¼Œåˆ°ç›®å‰ä¸ºæ¢ï¼Œæ®è¯´æ˜¯ç¬¬ä¸€å¥—基于COTS软件平å°çš„过程控制软件包。其最显著的特点之一就是所具有的自动查找和组æ€å·¥å…·èƒ½å¤Ÿä½¿å…¶éžå¸¸å®¹æ˜“地连接到智能化I/O过程控制设备网络系统ä¸åŽ»ã€‚
å…«ã€ç¡¬ä»¶ä¸Žè½¯ä»¶
通过çŸçŸå‡ 年的努力，我们ä¸æ–看到有许多新的软逻辑控制软件产å“被推出。许多独立软件供应商已ç»å¼€å§‹å‡ºå”®è¿™ç§è½¯ä»¶äº§å“ï¼Œä¼ ç»ŸPLC供应商在他们的产å“目录ä¸ä¹Ÿå·²ç»å¼€å§‹é€æ¸å¢žåŠ 基于工业PC的控制产å“。å¦å¤–，PLCå¼€å‘费用ä¸ï¼Œè½¯ä»¶å¼€å‘费用所å 的百分数æ£å¾—到稳定的增长。例如，Rockwellå…¬å¸å°†40ï¼…çš„å¼€å‘费用投入到硬件产å“å¼€å‘ä¸ï¼Œè€Œå°†60ï¼…å·¦å³çš„å¼€å‘费用转移到了软件开å‘工作上。其ç€çœ¼ç‚¹åœ¨äºŽå…¨çƒå¸‚场对软件产å“有强大的è´ä¹°åŠ›ï¼Œå¹¶è¦æ±‚软件产å“èƒ½å¤Ÿæ›´åŠ å®Œç¾Žåœ°è¿è¡Œåœ¨å·¥ä¸šæ ‡å‡†å¹³å°ä¸Šã€‚
PLC一般总是使用梯形图逻辑控制程åºï¼ŒçŽ°åœ¨ï¼Œæ‰€æœ‰ç±»åž‹çš„其他产å“æ£åœ¨åŠªåŠ›èŽ·å¾—并使用一些或者全部与IEC 61131-3æ ‡å‡†å…¼å®¹çš„ç¨‹åºè®¾è®¡è¯è¨€ï¼ŒåŒ…括梯形图逻辑图表ã€åŠŸèƒ½æ¨¡å—图表ã€é¡ºåºåŠŸèƒ½å›¾è¡¨ã€ç»“构化文本和指令表ç‰ç¨‹åºè®¾è®¡è¯è¨€ã€‚
然而，硬件ã€æ“作系统和应用软件相互之间都是延缓æ¤ç‹¬ç«‹çš„å®žä½“ï¼Œä¸Žä¼ ç»Ÿçš„å…¨é›†æˆPLC系统有很大的ä¸åŒã€‚éšç€ç¡¬ä»¶å’Œæ“作系统的ä¸æ–å‘展，æ“作系统所æä¾›çš„æ ‡å‡†å•†ä¸šåŒ–åŠŸèƒ½ç‰¹æ€§å¯èƒ½ä¼šè¿›ä¸€æ¥ä¿ƒä½¿PLCå˜æˆä¸€ç§æ›´åŠ ä¸åŒçš„控制设备，这也就是PLC需è¦é‡‡IEC61131-3æ ‡å‡†ç¨‹åºè®¾è®¡è¯è¨€çš„åŽŸå› æ‰€åœ¨ã€‚
å¯ä»¥é‡‡å–å„ç§æ–¹å¼æ¥è§£å†³PLC的编程问题。Rockwellå…¬å¸å¯¹å…¶æ‰€æœ‰äº§å“å‡é‡‡ç”¨Logix系列软件æ¥ç¼–程，包括机器人控制器ã€è½¯é€»è¾‘æŽ§åˆ¶å™¨ã€‚ä¼ ç»ŸPLC系统全部采用RSLogix 5000软件进行编程工作。其他途径包括微软技术，åƒDCOMã€ActiveX以åŠSunçš„Javaç‰ï¼Œåœ¨å°†æ¥ï¼Œä¹Ÿè®¸ä¼šä½¿ç”¨Microsoft.Net技术，其ä¸å¤§å¤šæ•°ç¼–程方å¼æ˜¯é€šè¿‡Sunå®ç³»ç»Ÿå’ŒONE（开放网络环境）æ¥å‘布的。
基于Windows CEçš„åº”ç”¨è½¯ä»¶å’Œæ ‡å‡†å·¥å…·å°†å…许工业用户å¯ä»¥é€šè¿‡å¤šé‡ç¡¬ä»¶ç”Ÿå‘½å‘¨æœŸçš„æ–¹å¼æ¥ä¿æŠ¤ä»–们所è´ä¹°çš„软件。这ç§è¶‹åŠ¿å°†è¿›ä¸€æ¥æ”¹å˜å·¥ä¸šç”¨æˆ·å¯¹ä¼ 统PLC产å“产å“çš„è´ä¹°å†³å¿ƒï¼Œè€Œä¸”ä»ç„¶è¦æ¶‰åŠåˆ°PLC硬件技术规范ã€å¤–围设备和通信连接能力，这好åƒæœ‰äº›ç±»ä¼¼äºŽè´ä¹°ä¸€å°å·¥ä¸šPCã€‚ç›¸å¯¹äºŽå·¥ä¸ºä¸€ç”¨æˆ·ä¹ æƒ¯æ€§å†³å®šè¿‡ç¨‹è€Œè¨€ï¼Œä»–ä»¬éœ€è¦è®¤çœŸè¯„价一ç§è¿‡ç¨‹æŽ§åˆ¶å™¨åŠå…¶ç¼–程软件的çµæ´»æ€§ã€‚这也有助于平æ¯äººä»¬è¯„价哪ç§ç¨‹åºè®¾è®¡è¯è¨€æ˜¯æœ€å¥½çš„争论。梯形图逻辑ã€æµç¨‹å›¾è¡¨ã€é™æ€é€»è¾‘ã€åŠŸèƒ½æ¨¡å—ã€IEC 61131-3æ ‡å‡†æ··åˆç¼–程，连åŒVisual Basicå’ŒVisual C++ç‰éƒ½èƒ½å¤Ÿå¾ˆå®¹æ˜“地把基于Windows CEçš„PLC作为一ç§å¯¹è±¡æ¥å¯¹å¾…处ç†ã€‚ä¸ä¹…以å‰ï¼Œä¸€äº›äº²çš„软逻辑和基于工业PC控制的产å“å·²ç»é—®ä¸–。
æ¥è‡ªäºŽåˆ¶é€ 业数æ®ç³»ç»Ÿï¼ˆMDS）公å¸çš„WinMotion软件在å•ä¸ªå¥—装软件ä¸æ供了软è¿åŠ¨æŽ§åˆ¶ã€è½¯é€»è¾‘控制（兼容IEC 61131-3æ ‡å‡†ï¼‰å’Œä¸€å¥—æ•°æ®æœåŠ¡å™¨ï¼Œå¹¶ä¸éœ€è¦ä»»ä½•è¿åŠ¨æŽ§åˆ¶æŽ¥å£å¡ä»¶ï¼Œæˆ–者专用硬件产å“。æ¤å¤–，它还能以实时方å¼æ供连ç»åŒ…括维护ã€ç”Ÿäº§å’Œè´¨é‡ç‰æ•°æ®ä¿¡æ¯ã€‚该软件å¯ä»¥è¿è¡Œåœ¨å…·æœ‰å•ä¸ªå¤„ç†å™¨å¹¶å®‰è£…有VenturCom RTX软件部件的Windows NTæ“作系统平å°ä¸Šã€‚该公å¸è¿˜å…¬å¸ƒäº†ä¸€å¥—开放å¼API接å£ï¼Œèƒ½å¤Ÿè®©å·¥ä¸šç”¨æˆ·è¿›æ¥é›†æˆç¬¬ä¸‰æ–¹è½¯ä»¶æŠ€æœ¯ã€‚
Rockwellå…¬å¸ä¹ŸæŽ¨å‡ºäº†SoftLogix 5800软件。该软件æ供了一ç§æ–°çš„软控制器，在一个相åŒçš„控制系统ä¸ï¼Œèƒ½å¤ŸåŒæ—¶å®Œæˆé¡ºåºå’Œè¿åŠ¨æŽ§åˆ¶åŠŸèƒ½ã€‚与该公å¸å…¶ä»–Logix产å“ä¸€æ ·ï¼Œè¯¥è½¯ä»¶ä»ç„¶ä½¿ç”¨äº†Logixè¿è¡Œå¼•æ“Žï¼ŒRSLogix 5000编程软件和NetLinx开放å¼ç½‘络。该软件也能è¿è¡Œåœ¨Windows NT/2000æ“作系统平å°ä¸Šã€‚
å‰ä¸ä¹…，Entivityå…¬å¸æŽ¨å‡ºäº†5.1版本的å¯è§†åŒ–é€»è¾‘æŽ§åˆ¶å™¨è½¯ä»¶ã€‚å…¶æ˜¾è‘—ç‰¹ç‚¹æ˜¯å¢žåŠ äº†ä¸€ä¸ªå¯¹DeviceNetæ ‡è¯†ç¬¦ç»„æ€å™¨çš„安装选项，以åŠæ”¹è¿›çš„OPCæœåŠ¡å™¨ã€‚该软件对NVRAM有更好的支æŒèƒ½åŠ›ã€‚
Automationdirect.comå’ŒKWå…¬å¸è”åˆæŽ¨å‡ºäº†é€‚åˆäºŽWinPLC CPU模件è¿è¡Œå¼•æ“Žå¹¶å…¼å®¹äºŽIEC 61131-3æ ‡å‡†çš„ProConOS PLC产å“。它具有抢å å¼ã€å¤šä»»åŠ¡è¿è¡Œå¼•æ“Žï¼Œè€Œä¸”被嵌入到Win-PLC模件ä¸ã€‚应用程åºçš„å¼€å‘采用MULTIPROGæ¥å®Œæˆï¼ŒMULTIPROG是一套兼容IEC 61131-3æ ‡å‡†çš„è½¯ä»¶å¼€å‘工具，它å…许工业用户在WinPLC上åŒæ—¶è¿è¡Œä»»åŠ¡ï¼Œç„¶åŽè¢«ç‹¬ç«‹åœ°è¿è¡Œï¼Œè€Œä¸”å¯ä»¥å…·æœ‰ä¸åŒçš„è¿è¡Œå¾ªçŽ¯å‘¨æœŸå’Œæ—¶é—´ç‰ˆæ®µã€‚
Twin CAT软件系统公å¸æ‰€æŽ¨å‡ºçš„Beckhoff软件å¯ä»¥è¿è¡Œåœ¨å®‰è£…有Windows NT/2000或Windows CE的工业PC上，能够将I/O接å£åµŒå…¥åˆ°å®žæ—¶è¿‡ç¨‹æŽ§åˆ¶å™¨ä¸ï¼Œå½¢æˆå¤šPLC系统ã€NCè½´å‘控制ã€ç¨‹åºè®¾è®¡çŽ¯å¢ƒå’Œæ“作站。所显示出æ¥çš„特点实际上是嵌入了IEC 61131-3软件的PLC,或者是工作于Window NT/2000æ“作系统平å°ä¸‹çš„软件NC。程åºå’Œè¿è¡Œç³»ç»Ÿå¯ä»¥åœ¨ç›¸åŒæˆ–者独立的工业PC上è¿è¡Œã€‚用户界é¢å’Œå…¶ä»–程åºä¹‹é—´çš„æ•°æ®ä¿¡æ¯é€šä¿¡åˆ™ä¾é Microsoftå…¬å¸çš„开放å¼æ ‡å‡†ï¼Œå¦‚OPCã€OCXã€DLLç‰ã€‚
ä¹ã€é€‚åˆPLC应用的新模件
å‰æ–‡å·²è®¨è®ºäº†æ–°çš„适åˆäºŽPLCçš„æ’å…¥å¼è¿åŠ¨æŽ§åˆ¶æ¨¡ä»¶ã€‚对于其他类型的æ’å…¥å¼éƒ¨ä»¶åŠå…¶é™„件，å¯ä»¥èŽ·å¾—更好的选择，åŒæ ·è¿˜æœ‰ä¸€äº›è¾ƒæ–°çš„选择方案。
Siemenså…¬å¸å·²ç»æŽ¨å‡ºäº†ä¸€ç§æ–°çš„基于AS-IçŽ°åœºæ€»çº¿æ ‡å‡†é€šä¿¡å¤„ç†å™¨æ¨¡ä»¶CP243-2，该模件为低级å˜é€å™¨æ€»çº¿æ供了直接地å€è¿žæŽ¥æ–¹å¼ï¼Œè¿˜èƒ½å¤Ÿä¸Žä»»ä½•S7-200 CPUåŠå…¶æ‰©å±•ç‰ˆæœ¬å·¥ä½œåœ¨ä¸€èµ·ã€‚
Automnationdirect.comå…¬å¸æŽ¨å‡ºäº†ä¸€ç§å为EZTextçš„æ–°åž‹PLC文本æ“作é¢æ¿ï¼Œè¯¥äº§å“支æŒå¹¿æ³›é€šä¿¡å议驱动程åºçš„选择。所支æŒçš„通信å议包括该公å¸çš„LOGICã€ABå…¬å¸çš„DF1ã€Omronå…¬å¸çš„Host Linkã€Mitsubishiå…¬å¸çš„FX系列ã€Modiconå…¬å¸çš„Modbus RTUå’ŒGE Fanucå…¬å¸çš„SNPXç‰ã€‚æ¯ä¸ªEZTextæ“作é¢æ¿éƒ½å¯ä»¥åœ¨DeviceNet版本ä¸å¾—到很好的利用。所有模伯å‡æ供了5个用户å¯å®šä¹‰æŒ‰é’®ã€ä¸€ä¸ªå†…è—èœå•ç³»ç»Ÿã€æ»šåŠ¨å¼æ•°æ®ä¿¡æ¯è¾“入，以åŠå…¨éš”离电æºä¾›åº”。EZTextæ“作é¢æ¿è¿˜æ供了5个用户这下义的LEDå’ŒLCD显示窗å£ï¼Œå¯æ”¯æŒ2-4è¡Œä¸è¶…过20个å—符数æ®ä¿¡æ¯çš„显示。
Aromatå…¬å¸ä¸ºå…¶FP0系列PLCæ供了一ç§å…·æœ‰12ä½åˆ†è¾¨åŠ›å’Œ8通é“模拟é‡è¾“入模件。一个FP0能够处ç†ä¸è¶…过24路的模拟é‡è¾“入信å·ï¼Œè¿˜èƒ½å¤Ÿå®Œæˆå¤šç§æµ®ç‚¹æ•°å—è¿ç®—ã€ç²¾ç¡®PID控制和自整定。åªè¦é€šè¿‡è°ƒåˆ¶è§£è°ƒå™¨å°±èƒ½å¤Ÿè¿›è¡Œæ¨¡æ‹Ÿé‡ä¿¡å·çš„远程监控。
åŒæ ·ä¹Ÿæ¥è‡ªäºŽAromatå…¬å¸çš„一ç§æ–°æ¨¡ä»¶æ˜¯FP2 PLC。FP2 PLC模件具有高速计数能力，ä¾é 4个信å·é€šé“其最高频率å¯ä»¥è¾¾åˆ°200kHzï¼›åŒæ—¶ï¼Œä¸€ä¸ªæ´»åŠ¨çš„电动机动动å•å…ƒèƒ½å¤Ÿå¤„ç†4个方å‘çš„è½´å‘è¿åŠ¨ï¼Œè€Œä¸”æ¯ä¸ªè½´å‘è¿åŠ¨çš„速度å¯ä»¥è¾¾åˆ°100kp/s。å¦å¤–，它还具环回路控制或者PWM输出。
ABB自动化公å¸æ出了一ç§æ–°çš„称为Industrial IT的编程解决方案，并æˆä¸ºå…¶AC 800F现场控制器产å“的一部分。AC 800F所具有的开放结构å•å…ƒä½“系能够åŒæ—¶å¤„ç†æœ¬åœ°å’Œè¿œç¨‹I/O模件ã€æ™ºèƒ½åŒ–ä¼ æ„Ÿå™¨çš„4-20mAä¿¡å·ï¼Œæ˜¯ä¸€ç§å…·å¤‡äº†å¤šç§çŽ°åœºæ€»çº¿æŠ€æœ¯çš„现场控制器。AC800F还æ供了å‡å°‘工程设备安装周期和资产优化分æžç‰æ€§èƒ½ï¼Œé€šè¿‡OPC技术æ高了与ActiveXå’ŒWeb的连接能力。AC800Fä¸çš„æ¯ä¸ªå•å…ƒå¯ä»¥ä»Ž4ç§ç‹¬ç«‹çš„现场总线网络采集和处ç†å„ç§è¯Šæ–æ•°æ®ä¿¡æ¯ï¼Œå®ƒè¿˜æ供了与IEC61131-3兼容的编程工具软件。
åã€é©¾å¾¡çŽ°åœºè®¾å¤‡çº§æŽ§åˆ¶
éšç€é€šä¿¡æŠ€æœ¯çš„进一æ¥å‘展，有å¯èƒ½åˆ©ç”¨é€šä¿¡ç³»ç»Ÿå°†æŽ§åˆ¶åŠŸèƒ½å½¢æˆé—çŽ¯è¿‡ç¨‹æŽ§åˆ¶ï¼Œå› ä¸ºè¶Šæ¥è¶Šå¤šçš„控制计算机已ç»åµŒå…¥äº†I/O系统。
例如，Rockwell自动化公å¸æ‰€æŽ¨å‡ºçš„DeviceLogix充分应用了模件技术，能够被完全集æˆåˆ°å·¥åŽ‚底层现场过程控制设备ä¸åŽ»ï¼Œä¸ºçŽ°åœºè®¾å¤‡çº§æä¾›äº†ä½Žä»·æ ¼è¿‡ç¨‹æŽ§åˆ¶åº”ç”¨ã€‚DeviceLogix还æ供了简å•åŒ–独立过程控制应用特点和性能，诸如å•ä¸ªåº”用æ¡ä»¶ã€äº‹ä»¶ä¾¦æµ‹ã€æŠ¥è¦ç®¡ç†å’Œå¸ƒå°”逻辑è¿ç®—ç‰ï¼Œå‡è½»äº†å…·æœ‰è¾ƒå¤šæŽ§åˆ¶ä»»åŠ¡çš„控制系统主控制器，甚至是最低级过程控制设备的负担。首先推出的过程控制产å“是ABå…¬å¸çš„1792/1792D系列ã€ArmorBlock MaXum I/O系列ã€1791D CompactBlock I/O系列ã€1799嵌入å¼I/O系列，以åŠ800E DeviceNet局部æ“作站和DeviceNet辅助软起动器系列。
在2000å¹´åˆï¼ŒSiemenså…¬å¸å°±æŽ¨å‡ºäº†IM 151/CPU，åŒæ—¶å°†æ‰€å¢žåŠ çš„PLC功能应用到ET 200S I/O系列产å“。
Festoå…¬å¸ä¹Ÿå·²ç»å°†PLC技术嵌入到其气调节阀产å“ä¸ã€‚该公å¸è¿‘推出的SB6产å“在这一领域得到了很好的应用。å¦å¤–，它æ供了与ABå…¬å¸SLC-500相åŒçš„技术特点，通过便æºå’Œè¿œç¨‹ç‰å¢žåŠ 了数å—é‡çš„模拟é‡I/O系列模件通é“。SB6还æ供了一个兼容于DeviceNet的电åå¼èŠ‚点，能够与DeviceNetæ•°æ®é‡‡é›†å™¨é›†æˆåœ¨ä¸€èµ·ï¼Œç™¾ä¸”介于电å模件和气动模件之间，为å„ç§åº”用功能æ供了PLC逻辑控制。
Phoenix Contactå…¬å¸æ‰€æŽ¨å‡ºçš„系列化DIN架装å¼PLC被称作远程现场控制器（RFC），而且éžå¸¸é€‚åˆäºŽInterbus I/O系统的应用。所有模件å•å…ƒéƒ½èƒ½å¤Ÿé‡‡ç”¨PCWORX组æ€å·¥å…·è½¯ä»¶è¿›è¡Œç¼–程设计工作，PCWORX是套完全基于IEC61131-3æ ‡å‡†çš„ç»„æ€å·¥å…·è½¯ä»¶åŒ…。
Wagoå…¬å¸æ‰€æŽ¨å‡ºçš„å¯ç¼–程现场控制器能够完全与其Wago I/O系统工作在一起，å…许工业用户在本地å˜å‚¨å’Œè¿è¡Œç¨‹åºï¼ŒåŒæ—¶è¿˜èƒ½å¤Ÿä¸Žç½‘络系统进行通信。它并ä¸éœ€è¦é€šè¿‡ç½‘ç»œä¼ è¾“å°±èƒ½å¤Ÿå¯¹ä¿¡å·è¿›è¡Œé¢„处ç†å’Œé€»è¾‘解决方案的调试。信å·é¢„处ç†ä»Žç›¸å½“程度上é™ä½Žäº†è£…载现场数æ®ä¿¡æ¯çš„è´Ÿè·ï¼Œèƒ½å¤Ÿä¸ºçŽ°åœºè¿‡ç¨‹æŽ§åˆ¶å»ºç«‹èµ·éžå¸¸å®Œå–„的分散控制应用。
VMICå…¬å¸åŒæ ·ä¹ŸæŽ¨å‡ºäº†å¢žå¼ºåž‹ç‰ˆæœ¬çš„DIN架装å¼IOMax PC控制器，å³VIOMAX-8450。现在该控制器已ç»é‡‡ç”¨äº†300MHzçš„MMX微处ç†å™¨èŠ¯ç‰‡ï¼Œè€Œä¸”ä»ç„¶é‡‡ç”¨åŸºäºŽIEC 61131-3æ ‡å‡†çš„IOWorks控制组æ€å·¥å…·è½¯ä»¶åŒ…进行编程设计。
å一ã€æ›¿ä»£åµŒå…¥å¼æŽ§åˆ¶å™¨
æ®ç›¸å…³è°ƒæŸ¥æŠ¥å‘Šæ˜¾ç¤ºï¼ŒçŽ°åœ¨å¯¹äºŽä½Žç«¯PLC市场的争夺ä»åœ¨ç»§ç»è¿›è¡Œï¼Œè¿™ä¹Ÿè¿›ä¸€æ¥ä¿ƒè¿›äº†PLCçš„å‘展。éšç€å¾®åž‹å’Œè¶…微型PLC技术的å‘展和数é‡çš„增长，它们已ç»å¼€å§‹è¿›å…¥åˆ°æ–°çš„应用领域。例如，微型PLCå·²ç»å¼€å§‹æ›¿åµŒå…¥å¼æŽ§åˆ¶å™¨çš„工作内容。åƒOmronå…¬å¸å·²ç»å¯Ÿè§‰åˆ°è¿™ä¸€æŠ€æœ¯å‘展的新动å‘，并é€æ¸è®¡åˆ’将其产å“应用于商业器具ã€é¥®æ–™åˆ†å‘设备以åŠå•†ä¸šã€å·¥ä¸šç‰ã€‚这些行业之所以æ£åœ¨åº”用微型PLC，æ£æ˜¯ç”±äºŽå®ƒå…·æœ‰å“越的çµæ´»æ€§ã€å¸‚场开å‘周期çŸã€é€‚应性强ã€ç«žäº‰æ€§çš„ä»·æ ¼ç‰ä¸€ç³»åˆ—优点所至。
对于PLC或者嵌入å¼æŽ§åˆ¶å™¨çš„选择主è¦ä¾èµ–于它们的体积大å°ï¼Œå°¤å…¶æ˜¯å¦‚果需è¦ç‰¹æ®ŠåŠŸèƒ½æ—¶ï¼ŒåµŒå…¥å¼æŽ§åˆ¶å™¨çš„缺陷就é€æ¸æ˜¾éœ²å‡ºæ¥äº†ã€‚尽管嵌入å¼æŽ§åˆ¶å™¨å…·æœ‰å¾ˆä½Žçš„ä»·æ ¼ï¼Œä½†å…¶ä¸ä»ç„¶åŒ…å«äº†è´¨é‡æŽ§åˆ¶ã€ç»´ä¿®ä»¥åŠæœåŠ¡ç‰æ–¹é¢çš„ä»·æ ¼ã€‚
Mitsubishiå…¬å¸çš„FX1S超微型和FX1N微型PLC系列产å“æ£åœ¨é¢å‘嵌入å¼åº”用领域å‘展，它们能够处ç†ä»Ž10-128个I/O通é“，并且具有2个轴å‘çš„è¿åŠ¨æŽ§åˆ¶æ€§èƒ½ï¼Œè¿˜å…·å¤‡PID控制指令应用于连ç»è¿‡ç¨‹æŽ§åˆ¶ã€‚
æ¥è‡ªäºŽEntertronå…¬å¸çš„SK1600-RIC型嵌入å¼å¯ç¼–程逻辑控制器（ePLC）具有16通é“æ•°å—é‡è¾“入和12通é“继电器输出基本å•å…ƒã€ä¸€ä¸ªRS-232接å£ã€ä¸€ä¸ª10kHz高速计数器通é“，以åŠ4kb的程åºå˜å‚¨å™¨ã€‚å¦å¤–，它å¯ä»¥åœ¨Windowså’ŒDOSæ“作系统平å°ä¸‹é‡‡ç”¨æ¢¯å½¢é€»è¾‘图编程方å¼è¿›è¡ŒæŽ§åˆ¶ç¨‹åºè®¾è®¡ã€‚该产å“è¿˜èƒ½å¤Ÿè¢«åº”ç”¨äºŽæœ‰æˆ–è€…æ— æ“作员界é¢çš„连接。
Omronå…¬å¸æœ€æ–°æŽ¨å‡ºçš„CPM2B系列微型控制器，其设计ä»ç„¶ä¿ç•™äº†å·¥ä¸šç”¨æˆ·æ‰€å¸Œæœ›çš„ä½Žæ€§èƒ½ä»·æ ¼æ¯”çš„ç‰¹ç‚¹ï¼Œä»¥ä¾¿å·¥ä¸šç”¨æˆ·èƒ½è‡ªç”±æž„å»ºæŽ§åˆ¶ç³»ç»Ÿã€‚å…¶ç‰¹ç‚¹è¿˜åŒ…æ‹¬æä¾›äº†å¤‡ä»½ç”µæ± ã€å¢žå¼ºåž‹é€šä¿¡æœºåˆ¶ã€I/O通é“å¯æ‰©å±•åˆ°128è·¯ã€RS-232接å£ã€å¯ç§»åŠ¨ç»ˆç«¯ã€PID控制回路以åŠå…¶ä»–高级指令系统ç‰ã€‚
Blue Earth Researchå…¬å¸å·²ç»å°†Xplor-52RæŽ§åˆ¶å™¨å¢žåŠ åˆ°å…¶ä¸ºåµŒå…¥å¼æŽ§åˆ¶åº”用所设计的Xplor系列个人数å—控制器ä¸ï¼Œèƒ½å¤Ÿæ供有é™çš„监控功能和数æ®ä¿¡æ¯è®°å½•åº”用。它能够支æŒXplorç³»åˆ—æ‰€æœ‰æ ‡å‡†ç‰¹ç‚¹ï¼ŒåŒæ—¶åŒ…括了一个89C52 CPUå•å…ƒå’Œç”¨äºŽå˜å‚¨Basic程åºçš„8kbçš„EEPROMå˜å‚¨å™¨ï¼Œä»¥åŠä¸€ä¸ªRS-232接å£ã€‚其他元件包括一个8通é“12ä½A/D转æ¢å™¨ã€ä¸€ä¸ª4通é“12ä½å…·æœ‰æœ‰æ•ˆè¾“出电压范围的D/A转æ¢å™¨ã€ä¸€ä¸ªçœ‹é—¨ç‹—定时器，以åŠä¸€ä¸ªLCD和键盘接å£ã€‚
å二ã€PLC将会æˆä¸ºè¿‡ç¨‹æŽ§åˆ¶é¢†åŸŸå†…的日用å“
仅仅从PLCç³»ç»Ÿä»·æ ¼æ£åœ¨é€æ¸é™ä½Žçš„ç†ç”±è¿›è¡ŒæŽ¨ç†ï¼Œå°¤å…¶åœ¨ä½Žç«¯åº”用方é¢ï¼ŒPLC将会æˆä¸ºè¿™ä¸€é¢†åŸŸçš„日用å“。由于PLC系统最å°æ¨¡ä»¶å•å…ƒçš„ä»·æ ¼ä¹Ÿåªä¸è¿‡100美元，甚至更低，å³ä½¿è¿™äº›æ¨¡ä»¶å‡ºçŽ°æ•…障，工业用户从心ç†ä¸Šå·²ç»æ„Ÿè§‰ä¸åˆ°æ˜¯å¦è¿˜å€¼å¾—é‡æ–°ä¿®ç†ã€‚许多工业用户直接采å–了抛弃出现故障的模件，进而æ¢ä¸Šä¸€å—新模件的处ç†æ–¹å¼ï¼Œå› 为é‡æ–°ä¿®ç†è¿™æ ·çš„故障模件也许会花费åŒæ ·ç”šè‡³æ›´å¤šçš„费用。
相å，我们ä¸è¦è¢«ä½Žä»·æ ¼æ‰€æ„šå¼„。一些å°åž‹ç”šè‡³è¶…å°åž‹PLC系统已ç»å‘工业用户æ供了模拟é‡I/Oã€PID控制回路ã€é€šä¿¡æŽ¥å£ï¼Œç”šè‡³ä¸Žä¼ä¸šç½‘络系统相连接的现场总线。具有14个通é“çš„I/Oå’Œ4个PID控制回路的PLCç³»ç»Ÿï¼Œå…¶ä»·æ ¼æ‰99美元，这ç§äº§å“éžå¸¸é€‚åˆå°ç³»ç»ŸæŽ§åˆ¶åº”用的需è¦ã€‚
一些PLC供应商ä¾æ‰˜å¼ºå¤§çš„应用市场继ç»å‘展å°åž‹PLC产å“，甚至大é‡çš„工业用户已ç»å°†å…¶çœ‹ä½œæ˜¯ä½Žç«¯åº”用市场上的日用å“。PLC供应商需è¦å……分考虑的问题是他们ä¸ä»…ä»…è¦ä¾›åº”硬件产å“，还必须采å–相应的措施为工业用户解决工程师å¯ç”¨çš„组æ€å·¥å…·ã€æ•…障诊æ–技术ã€ç½‘络通信能力以åŠé™¤åŸºæœ¬è‡ªåŠ¨åŒ–ç¡¬ä»¶ä»¥å¤–çš„é™„åŠ è½¯ä»¶åŒ…çš„é€‚ç”¨æ€§èƒ½ã€‚
Rockwellå…¬å¸æœ€è¿‘为其Compact Logix系列产å“å¢žåŠ äº†ä¸€ç§æ–°çš„Compact Logix 5330控制器。该控制器能够与1769系列Compact I/O模件，ä¸è¶…过256个本地I/O测点，å¦å¤–还为用户æ供了256kbå˜å‚¨å†…å˜ã€‚CompactLogix使用了相åŒçš„能åŒæ—¶è¢«ControlLogixã€Flex Logixã€SoftLogixå’ŒRSLogix 5000共享的Logix控制引擎。
Automationdirect.comå…¬å¸ä¸ºå…¶DL05型微型PLC也æ供了个别新版本产å“。D0-05DD-D包å«äº†å…·å¤‡8通é“DC输入和8通é“DC输出的DL05 CPU模件，采用了12/24 V DC电æºä¾›ç”µã€å…·å¤‡6kbçš„å˜å‚¨å™¨ï¼Œå¯åˆ©ç”¨RLL/RLLPlus进行程åºè®¾è®¡ï¼Œè¿˜æ供了一个RS-232程åºå’Œé€šä¿¡æŽ¥å£ã€‚它具有两ç§å¯ç»„æ€å¹¶ç‹¬ç«‹äºŽCW/CCW的脉冲顺åºè¾“出或者æ¥åºï¼Œç›´æŽ¥è„‰å†²è¾“出频率å¯ä»¥è¾¾åˆ°7kHz。æ¤å¤–，D0-05DR-D还æ供了6通é“继电器输出。
Siemenså…¬å¸ä¸ºå…¶SIMATIC S7-200系列产å“推出了采用一ç§æ–°ç±»åž‹CPU的微型PLC系统。新类型CPU为S7-226，该CPU为能够进一æ¥è¿žæŽ¥åˆ°å·¥ä¸šLAN系统或者诸如调制解调器ã€æ‰“å°æœºã€æ¡å½¢ç 阅读器ç‰å¤–å›´è®¾å¤‡ï¼Œç›¸åº”å¢žåŠ äº†ç‚¹åˆ°ç‚¹æŽ¥å£ï¼ˆPPI）或者自由接å£ï¼ˆè¿žç»ASCII）。
æ¥è‡ªäºŽGE Fanuc自动化公å¸çš„一ç§æ–°äº§å“是VersaMax CPUE05 CPU模件。该模件的特点主è¦åŒ…括与Ethernetç‰çš„连接能力ã€æ›´å¿«çš„指令执行时间，以åŠæ›´å¤šçš„用户å˜å‚¨å™¨æ”¯æŒã€‚æ–°å¢žåŠ çš„åŠŸèƒ½åŒ…æ‹¬ä¸€ä¸ª10Base-T连接ã€å…¨åŒå·¥é€šä¿¡æŽ¥å£ï¼Œé€šè¿‡åˆ©ç”¨åˆ‡æ¢å¼€å…³ä»¥ä¾¿æ¶ˆé™¤æ•°æ®ç¢°æ’žçŽ°è±¡ï¼Œå¹¶åŒæ¥è¿›è¡Œå‘é€å’ŒæŽ¥æ”¶æ•°æ®ä¿¡æ¯ï¼›å®ƒè¿˜æ供了64kb用户å¯é…ç½®å˜å‚¨å™¨ï¼Œé‡‡ç”¨RS-232å’ŒRS-485接å£è¿›è¡Œé€šä¿¡è¿žæŽ¥ï¼›å…·å¤‡æœ¬åœ°æ“作员界é¢ï¼›ä»¥åŠå¯é€‰æ‹©ä¸ŽEthernetã€DeviceNetå’ŒProfibus现场总线连接。
Mitsubishi电å自动化公å¸å·²ç»æŽ¨å‡ºäº†æ–°ä¸€ä»£Q系列PLC系统，程åºè®¾è®¡é‡‡ç”¨äº†åŸºäºŽWindows编程软件工具。程åºé€šè¿‡USB接å£è¿›è¡Œä¼ 输。其特点是能够支æŒInternet电å邮件ã€è°ƒåˆ¶è§£è°ƒå™¨å’Œ10/100Mb/s Ethernetï¼›å¯ä»¥è¿žæŽ¥åˆ°DeviceNetã€Profibusã€CC-Linkå’ŒNET/10ï¼›æ¯ä¸ªCPUå¯ä»¥å…许有ä¸è¶…过252个程åºçš„åŒæ¥è¿è¡Œï¼›å¦å¤–，它的体积也是éžå¸¸å°çš„。
CTCå…¬å¸ä¸ºå·¥ä¸šç”¨æˆ·æ供了一套2601自动化æˆå¥—工具，该工具包括增强型2601控制器和基于Windowså¹³å°çš„Quickstep SE程åºå¼€å‘工具软件包，Quickstep SE是该公å¸ç”¨äºŽ2601控制器具有专利的程åºè®¾è®¡è¯è¨€ï¼Œå°¤å…¶èƒ½å¤Ÿæ»¡è¶³éœ€è¦æ•°å—控制和串行通信的å°åž‹åº”用项目的应用è¦æ±‚。为2601所编写的控制程åºåªè¦é€šè¿‡ç›¸åº”的转æ¢å°±å¯ä»¥è¿è¡ŒäºŽå…¶ä»–2000系列CTC控制器上。
一ç§æ–°çš„æ¥è‡ªäºŽIDECå…¬å¸çš„产å“是MicroSmart PLC，在该PLCçš„CPU模件上æ供了10ã€16或者24通é“çš„I/Oã€‚å…¶ç‰¹ç‚¹åŒ…æ‹¬ä¸€ä¸ªæ ‡å‡†çš„ç”µæºä¾›åº”电路ã€4通é“高速计数器ã€ä¸€ä¸ªRS-232接å£å’Œä¸€ä¸ªæ¨¡æ‹Ÿé‡åˆ†åŽ‹è®¡ã€‚具有24通é“I/Oçš„CPU模件也能够与总计ä¸è¶…过88通é“çš„I/O模件一起工作。
æ¥è‡ªifm电å技术公å¸ï¼Œå¹¶å…·æœ‰ä¸€å¯¹AS-I现场总线的主控制器包括两个采用IEC 61131-3æ ‡å‡†ç¼–ç¨‹ä»¥åŠä¾é AS-Iå’ŒRS-485通信的AC 1011 PLC。AC 1011采用了å•ä¸ªæŽ§åˆ¶å™¨æ–¹å¼ï¼Œå…¶I/Oå…许ä¸è¶…过124通é“输入和124通é“输出；而AC 1012则采用了åŒæŽ§åˆ¶å™¨æ–¹å¼ï¼Œå…¶I/O通é“æ•°é‡æ˜¯AC 1011的两å€ã€‚
æ¤å¤–，许多PLC系统已ç»ä¸Žæ“作员é¢æ¿å’Œå…¶ä»–HMI系统一起使用，在有些情况下，PLC的逻辑处ç†åŠŸèƒ½å·²ç»è¢«ç›´æŽ¥é›†æˆåˆ°HMI软件ä¸ã€‚
æ¥è‡ªäºŽB&R工业自动化公å¸çš„B&R PP21/41高级æ“作é¢æ¿è¿›ä¸€æ¥ç»“åˆäº†Compact PLCå’ŒHMIé¢æ¿ç³»ç»Ÿï¼Œå¹¶åº”用于集æˆä½Žä»·æ ¼æœºæ¢°æŽ§åˆ¶å’Œæ“作员界é¢ã€‚它具备700kbçš„SRAMå’Œ1.2MBçš„FlashPROMå˜å‚¨å™¨ï¼Œé‡‡ç”¨äº†åŸºäºŽIEC 61131-3æ ‡å‡†çš„ç¨‹åºè®¾è®¡è¯è¨€ã€ANSI Cå’ŒB&R自动化Basicè¯è¨€è¿›è¡Œç¼–程设计工作。模件å•å…ƒåŒ…括16通é“æ•°å—é‡I/O，所具备的6个å¯åˆ©ç”¨æ‰©å±•æ’æ§½ç”¨äºŽé™„åŠ çš„æ•°å—é‡ã€æ¨¡æ‹Ÿé‡é€šé“扩展以åŠé€šä¿¡I/O模件。串行和CANbus接å£ä¹ŸåŒæ ·è¢«åŒ…å«åœ¨å…¶ä¸ã€‚
EXORå…¬å¸ä¹Ÿå·²ç»é€šè¿‡å°†ä¸€ä¸ªPLCå’ŒI/O模件嵌入到一个å«åšHMIcontrol集æˆç³»ç»Ÿçš„æ–¹å¼æ¥æ‰©å±•å…¶UniOP系列HMIæ“作é¢æ¿ï¼ŒPLC模件完全与其所有UniOP产å“兼容，并使用了相åŒçš„ã€åŸºäºŽWindowså¹³å°ã€ç”¨äºŽæ‰€UniOPæ“作é¢æ¿çš„组æ€è½¯ä»¶åŒ…。
å三ã€ç»“æŸè¯é¢å¯¹æ¿€çƒˆå¸‚场竞争所带æ¥çš„å±€é¢ï¼Œä¼ä¸šåªæœ‰ç´§ç´§æŠŠæ¡å¸‚场è¿è¡Œçš„脉æ，充分结åˆè‡ªèº«çš„特点，é¢å‘世界ç»æµŽçš„大潮，ä¸æ–èžå…¥æ–°æŠ€æœ¯ã€æ–°æ–¹æ³•ï¼ŒæŽ¨é™ˆå‡ºæ–°ã€‚åŒæ—¶ï¼Œéšé˜—PLC供应商的ä¸æ–努力，并进一æ¥åœ¨e-åˆ¶é€ å’Œe-控制技术方é¢å®žçŽ°æ–°çš„çªç ´ï¼Œæ‰€æŽ¨å‡ºçš„新一代PLCå°†èƒ½å¤Ÿæ›´åŠ æ»¡è¶³å„ç§å·¥ä¸šè‡ªåŠ¨åŒ–控制应用的需è¦ã€‚
DONGYING SHENGYU METAL PRODUCT CO.,LTD , https://www.shengyucasting.com