VT-HNC100-1-23/W-08-0-0 R900955334 REXROTH

In recent years,with the development of microelectronics technology,large-scale integrated circuit technology,computer technology and communication technology,PLC has made a leap in technology and function.On the basis of the initial logic operation,functions such as numerical operation and closed-loop adjustment have been added,and functional modules such as analog quantity and PID adjustment have been added;the operation speed has been improved,and the capability of the CPU has caught up with the industrial control computer;the improvement of the communication capability has developed many It is a kind of local bus and network(LAN),so it can also be constituted as a distributed system.Especially personal computers are also absorbed into PLC systems.The development of PLC in process control will be an intelligent transmitter and field bus,and it will expand the function downward and open the bus.

近年来随着微电子技术、大规模集成电路技术、计算机技术和通信技术等的发展，PLC在技术和功能上发生了飞跃。在初期逻辑运算的基础上，增加了数值运算、闭环调节等功能，增加了模拟量和PID调节等功能模块；运算速度提高，CPU的能力赶上了工业控制计算机；通信能力的提高发展了多种局部总线和网络(LAN)，因而也可构成为一个集散系统。特别是个人计算机也被吸收到PLC系统中。PLC在过程控制的发展将是一智能变送器和现场总线，暨向下拓展功能，开放总线。