PC - economic and practical 基于PLC)

PC - economic and practical -based PLCIPDAS company welcome to visit e hall exhibition hall 3 PLC controller PLC programmable controller, PLC programming cable. 。 。 Long-term since, PLC is always active in the main battlefield of industrial automation control, for all kinds of automatic control equipment provides a reliable control applications. The main reason is that it can be for automation applications to provide a safe and reliable and more perfect solutions, suitable for the current industrial enterprise of automation application requirements. But traditional PLC controller technology update slow, low degree of open system, high price of the common problems, with the advent of the era of PC and Internet, traditional PLC are faced with the problem is more outstanding. In contrast, the industrial PC or PC - -based controller can completely into the era of network information system, network system of the basic characteristics, namely the system with high performance and low price, the advantages of the open and abundant talent base, so the PC - -based controller once a strong vitality, development is very rapid. PC - -based controller to replace the traditional PLC, it is necessary to solve the problem of reliability and programming, the PC - -based controller appears early, the commonly used industrial PC + I/O card, he wrote software or configuration software to realize data collection and control, but this kind of system reliability is not high, the development difficulty is big, tall to the requirement of programming, maintainability is poor, so it is difficult to mass adoption. In recent years, this kind of situation has been fundamental changes, PC - -based from appearance to the reliability of the controller and PLC are very similar. In programming, because IEC61131 - Three of the programming language standard and widely adopted, for PC - With the rapid development of -based controller has paved the way. In this way, the PC - -based controller not only has the advantage of PC, also has the advantage of traditional PLC. It can be seamlessly integrated into the Internet age of information system, completely accords with the trend of The Times. I - IPDAS launched ISaGRAF embedded controller 8 xx7 series is one of the representative. The product by the main control unit, expansion unit and I/O modules. Master control unit with 80188 MHZ CPU 40, 512 k Flash, 512 k SRAM, to ensure that the program download, storage and operation; Built-in four communication port, RS - 232/485 / Ethernet, build the network flexibility; Built-in block NVSRAM and EEPROM, in addition, the additional 256 k / 512 k battery protection SRAM, in order to ensure the safety of the data and refresh the quickness, is beneficial to solve some of the parameters and data of the cumulative amount of storage, such as more data storage, can also be extended 2 m / 4 m / 8 m/m / 16 and 32 MB Flash, is unique among similar products. Low master control unit four or eight I/O slots, module can be inserted into a variety of types, combination is convenient; Low master control unit has four buttons on the front panel, five digital tube and three LED lights, the user can be used for simple display and operation, the complex operation can connect the commonly used industrial MMI; Built-in real-time clock, conform to the requirements of the 2000, can provide system needs minutes when (date) (month) (year); Low internal watchdog, to guarantee the system automatic recovery; Low power protection circuit and communication can ensure the safety of the system. Extension units when required by the main control unit capacity cannot achieve, can through the main control unit of the RS - The expansion unit is connected to 485, extension units have 4/5/8/9 slots four types; When a master control unit can be even more extension unit. I/O module, AO, DI, low AI DO, timing, counting and other traditional module; Low coding input, servo motor control, step motor control, RS - 232/422/485, print special module interface, etc. Network communication low Ethernet/RS - 485 interface, and support the MODBUS, MODBUS/TCP protocol, the HMI software to any third party such as ifixes, CITECT, INTOUCH connection; Ethernet interface, can be realized through Internet/Intranet existing hardware and software resources remote economic connection, make the production very convenient information transfer to where it is needed; The communication between the low controller can be directly through the RS - 485 / Ethernet and relevant agreement, and not through the upper machine, can improve the reliability of the system; Low controller can also be connected directly to other MODBUS RTU HMI, field operation. Can also be programmed to 232/422/485 device connected to the non-standard. Programming development platform for ISaGRAF integration environment, support IEC61131 - 3 5 kinds of programming language, that is, a structured text ( 结构文本) , ladder diagram ( 梯子逻辑) , instruction set, 指令列表) , the function block diagram ( 功能块图) And flow charts ( 顺序功能图) And easy to use to learn; Application by the compiler to generate the target code, can be through the RS - 232/485 of the download, also can download via Ethernet, if it is a remote site, also can be achieved through Modem remote downloading and maintenance; The development environment to provide the function of off-line simulation, so that can save time for the actual debugging, reduce the chance of accident; Rich function block and the function, can also be convenient to join their function or function block, make the program function unceasing accumulation; When the document is complete; Power-fail protection data, suitable parameters, flow will be accumulated to save; Analog processing ability strong, to overcome the lack of traditional PLC controller.
Owing to its programmable control systems and plc controller price benefits, has become a buzzword in the programmable control systems market.
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