The protocol is selected with sections 4 and 5 of the S3 switch according to the table:

4

5

Protocol

Off (0)

Off (0)

Modbus RTU

Off (0)

On (1)

Modbus ASCII

On (1)

Off (0)

BACnet master

On (1)

On (1)

BACnet slave

Protocol selection

WARNING!

The BACnet slave mode does not support the discover function.