用Modbus协议实现DCS与PLC之间的串行通讯

Modbus Protocol Implementation Serial Communication Between DCS and PLC

本文主要通过讨论Honeywell PKS集散系统与Ingersoll-rand CMC可编程序控制器之间实现串行通讯所需的Modbus协议,硬件配置,软件组态以及连线,来说明用Modbus协议实现DCS与PLC之间串行通讯的一般方法及注意事项。

This paper illustrated the general methods and precautions with Modbus protocol implementation serial communication between DCS and PLC, by discussing the Modbus protocol, hardware configuration, software configuration and connections between Honeywell PKS distribution system and Ingersoll-rand CMC PLC.