PLC可编程控制器与PIC单片机的远程通信

The Remote Communication of PLC Programmable Controller and PIC Microprocessor

设计了以单片机作为仪表,以PLC为控制器的网络系统的通信接口硬件及软件,其中:单片机采用PIC16F877,PLC采用西门子公司的226CPU.系统所采用的通信协议,可以实现点对多的通信,所设计的通信协议的附加信息较少,有利于减少系统的响应时间.

The paper introduced the design of interface and software which adopted SCM and PLC. The SCM which was PIC 1617877 served as an instrument and the PLC which usd the 226CPU of Siemens played the part of control unit. The communication protocol which implemented the point-to-multipoint was applied to the system. To reduce the response time of communication, the design of communication protocol contained less additional information.