IS200STURH1A
IS200STURH1A
IS200STURH1A
completely overcomes these shortcomings.
(1) in the FCS, by means of field bus technology, all the I/O modules are in the industrial field, and all the signals through a distributed intelligent I/O modules is converted to a standard digital signal at the scene, just a cable can connect all the child standing, and then sends the field signal very briefly to the control room monitoring equipment, reduces the cost, It is also easy to install and maintain, and digital data transmission makes the system have high transmission speed and strong anti-interference ability.
(2) FCS is open. In FCS, software and hardware are subject to the same standards, which makes them interchangeable and easy to replace. Program design IEC1131-3 five international standard programming language, programming and development tools are completely open, but also can use PC rich hardware and software resources.
(3) The efficiency of the system is greatly improved. In FCS, a PC can simultaneously complete the PLC and NC/CNC tasks that used to be completed by two devices. Under the multi-task Windows NT operating system, the soft PLC in PC can execute up to a dozen PLC tasks at the same time, which not only improves the efficiency, but also reduces the cost. And the PLC on PC has the function of online debugging and simulation, which greatly improves the programming environment.
In FCS, the basic structure of the system is: industrial computer or commercial PC, fieldbus master station interface card, fieldbus input/output module, PLC or NC/CNC real-time multi-task control software package, configuration software and application software. The main functions of the upper machine including the system configuration, database configuration, history library configuration, graphics configuration, control algorithm configuration, data report configuration, real-time data display, historical data, graphical display, parameter list, data printing, data input and parameter modification, control arithmetic, alarm processing, fault processing, communications control and man-machine interface and so on various aspects, And really realize the control centralization, risk dispersion, data sharing, completely open control requirements.
5 conclusion
From the previous discussion, it can be seen that the key technology of FCS is intelligent instrument technology and fieldbus technology. Intelligent instrument not only has the advantages of high precision, self-diagnosis, and control function, will replace the traditional 4-20mA analog instrument. The fieldbus connecting the field intelligent instrument is an open, digital, multi – contact bidirectional transmission serial data path, which is a combination of computer technology, automatic control technology and communication technology. Combined with the rich hardware and software resources of PC, it not only overcomes the shortcomings of the traditional control system, but also greatly improves the flexibility and efficiency of the control system, forming a new control system, creating a new era of automatic control, and becoming the inevitable trend of the development of automatic control
