【提问】：RS485 PORT COMMUNICATION
【详情】：I'M TRYING TO COMMUNICATE WITH THE DEVICE THROUGH ETHERNET TCP/IP MODBUS AND SERIAL RS485 MODBUS AND IN EVERY CASES THERE IS AN ERROR OF TIMEOUT. I NEED YOUR HELP TO SOLVE THIS. I'VE TRIED MANY OF THE SOFTWARES FOR RS485 PORT TESTERS AND NO SUCCESS.