Hi5 controlleroperationHi5 Controller Operation Manual7. System setting7.2. Control parameter7.2.3. Serial portOn this page7.2.3. Serial port7.2.3. Serial port This sets up the parameters for RS232, RS422 and RS485, and sets up the usage for serial ports. 7.2.3.1. Serial port #17.2.3.2. Serial port#2