iSMA-B-MINI/MIX Modbus User Manual
www.ismacontrolli.com
DMP262en | 1st Issue rev. 8 | 05/2022
page 23 of 107
Switches set as in the figure above will set the module address to 11.
4.6 Baud Rate
The transmission baud rate is set with the S3 switch (sections 1, 2, and 3) in accordance
with the following table:
1
2
3
Baud Rate
Off (0)
Off (0)
Off (0)
Defined by the user in the register
Off (0)
Off (0)
On (1)
76800
Off (0)
On (1)
Off (0)
4800
Off (0)
On (1)
On (1)
9600
On (1)
Off (0)
Off (0)
19200
On (1)
Off (0)
On (1)
38400
On (1)
On (1)
Off (0)
57600
On (1)
On (1)
On (1)
115200
Table 4. Baud rate selection
4.7 Protocol
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
Table 5. Protocol selection
4.8 Default Settings
Register Name
Default Value
COUNTER
0
WARNING!
The BACnet slave mode does not support the discover function.
