32通道开关信号采集系统的设计与实现

Design of Switch Signal Acquisition Card with 32-Channels

针对现代工业控制系统中开关量控制的问题,提出通过上位机与控制板的通讯来实现对开关量控制的方法,以STC89C51单片机为核心,设计了一种带有RS485通讯接口的多路开关量控制板,实现了开关量信号采集、控制、显示、判断及执行相应操作功能。

Aiming at control of switch quantity the method of controlling by communication between supervisory computer and controller board was come up with. A type of controller board with RS485 and modbus interface that takes STC89C51 as its core was designed. Some function comes true,such as collecting single-numbers,controling, displaying,judging and running operations.