VB与台达PLC通讯程序源码 可以监控台达PLC的输入输出状态 注释很好的解释了通讯协议的用法-VB and Delta PLC communication program source code can monitor the the Delta PLC input and output status note explained the communication protocol usage

通过编写VB控制界面实现在rs232下对三菱plc通讯，可以读写（x，y，m等）强制y关或开-In rs232 communication Mitsubishi plc can read and write (x, y, m) forces y off or open by writing VB control interface to achieve