Both RS485 and IP I/O modules work with Modbus protocol by default. Protocol configuration can be adjusted by changes on the 4th and 5th bit of the S3 DIP switch according to the table:
|
4 |
5 |
Protocol |
|---|---|---|
|
Off (0) |
Off (0) |
Modbus RTU (in IP modules: Modbus TCP/IP) |
|
Off (0) |
On (1) |
Modbus ASCII |
|
On (1) |
Off (0) |
BACnet master (in IP modules: BACnet IP) |
|
On (1) |
On (1) |
BACnet server |
Protocol selection
Warning!
The BACnet slave mode does not support the discover function.