HMImodbus协议控制台达变频器简单的速度控制(HMImodbus protocol controls delta frequency converter with simple speed control)

采用arduino MEGA2560做MODBUS从站，配合Labview或者维伦通HMI上位机主从通信，实现00000（读写线圈），10000（读开关量输入），30001（读模拟量），40001（读写保持寄存器即PWM）(Using arduino MEGA2560 do MODBUS from standing, cooperate with Labview or whalen HMI upper machine Lord from communication, achieve 00000