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

饲料自动配料系统，可以支持4个配料秤，RS232通讯，支持三菱FX系列PLC通讯-Feed automatic batching system, can support 4 batching scale, RS232 communication, support Mitsubishi FX series PLC communication