摘要
以西门子S7-200系列可编程控制器以及MICROMASTER系列变频控制器为例,介绍了遵照Modbus协议建立的个人计算机与可编程控制器之间的通讯以及遵照USS协议建立的个人计算机与变频控制器、可编程控制器与变频控制器之间的通讯。
Taking the example of the S7-200 family of PLC and MICROMASTER family of inverter of Siemens Corporation,this article describes the methods by which can be set up communication among PC,Inverter and PLC according to the requirement of Modbus protocol or USS protocol.
关键词
个人计算机
可编程控制器
变频器
通讯协议
RS485接口标准
Personal computer (PC)
Programmable logic controller (PLC)
Inverter
Communication protocol
RS485 interface standard
