VB6.0与变频器的RS485或Modbus通讯，控制变频器的参数设定，运行状态，运行频率，读当前状态，电流，电压，频率，故障等。支持远距离控制。-VB6.0 and drive the RS485 or Modbus communications, control the inverter parameter settings, operation status, operating frequency, read the current state, current, voltage, fr