1, mach3 modbus RTU controlled frequency by inverter, but when the drive starts, SS mistakes.
or，2, mach3 through modbus into 0-10V analog input to the inverter, inverter start, SS also appeared wrong

FTDI drivers to the latest version, Plugin is 17fd


Error returned from USB function FT_Write.
Error FTDI USB Driver Error
Error = FT_IO_ERROR
Bytes requested:64
Byees written:0