Commissioning Process - ABB RVT Serie Instrucciones De Instalación Y De Funcionamiento

- Termination resistor: built in, selectable by a switch. 120 ohms resistor is needed
at both end of the line and must be switched or not depending on the location in
the Modbus network topology.
- Transient voltage suppressors
- Screwed terminals on the RS485 side
- TX – RX Led indication for easy debugging and troubleshooting
- Slew-Rate Limited for Error-Free Data Transmission (minimizing EMI and
reducing reflections caused by improperly terminated cables)
- Drivers are short-circuit current limited
- The receiver input has a fail-safe feature in case of broken connection
Compatible Devices: Any Modbus device capable of Modbus communication as a
-
master.
- Speed reply time: better than 5 ms @ 57600 bauds
- Max data packet: Any complete table provided in the Modbus data table

4.5 Commissioning process

To install the RS485 Modbus adapter, follow the hereafter commissioning process.
- Disconnect power supply from the controller
- Wait the required time to ensure all capacitors are discharged
- Connect the signal ground (if present) to GND
Connect the twisted pair to the A and B connections
-
Insert the RS485 Modbus adapter in the controller
Fix it with the appropriate screw
-
- Ensure that all connections are tight.
RS485 ç RS485 Modbus adapter 11