摘要
针对电动机正反转传统控制存在的弊端,通过PLC中的定时器及互锁、联锁等保护手段对电动机的正反转加以控制,从而避免操作不当或误操作而引起事故。这里主要讨论改进后的继电器接触控制电气原理图,对应的I/O配置接线图,PLC梯形图,部分程序,并对改进后的原理进行分析,得出结论性的判断。
Based on positive inversion of traditional motor control of the drawbacks, the PLC timer, interlocking chain and other means of protection for the motor positive inversion of control, so as to avoid improper operation or misoperation caused the accident. The improved access to relay electrical control schematic, corresponding to the I / O configuration wiring diagram, PLC ladder, some of the procedures are discussed, and improved principle is analysed, come to the conclusion of the judge.
出处
《现代电子技术》
2009年第12期173-174,178,共3页
Modern Electronics Technique
关键词
电动机正反转
PLC
梯形图
传统控制
positive inversion of motor
PLC
ladder
traditional control
