Modbus RTU Connect the Modbus master to the controller via the RS-485+ and RS-485- cables. Supply the controller with voltage. Change the configuration values if necessary. The controller is set to slave address 5 ex works, baud rate 19200 baud, even parity, 1 stop bit. To test the interface, send bytes 05 65 55 00 2F A7 to the controller (you can find a detailed description of the Modbus function codes in chapter Modbus RTU). The object dictionary is read out.
