PLC在EMIS车站信号微机联锁控制系统中的应用

The Application of PLC in EMIS Microcomputer Railway Signal Interlocking System

EMIS车站信号微机联锁控制系统、采用PLC作为下位联锁系统。本文说明了PLC在系统中所起的作用,并介绍了PLC系统的软、硬件结构,阐明PLC与上位联锁系统的通信及解决通信死锁的方法,并对系统的故障-安全性、可靠性进行了探讨。

EMIS microcomputer railway signal in terlocking system uses Siemens programmable toiler as it's lower - level interlocking system . The function of the lower - level interlocking system and the hardware and software structure of the system are described in the paper . The designing method of the communication program between the upper - level interlocking system and lower - level interlocking PLC is presented , and the technique used for solving the dead locks in the communication is discussed in detail . The overall architechture of PLC system aiming at a high degree of safety, reliability is shown .