iSMA-B-MG-IP User Manual
www.ismacontrolli.com
DMP260en | 1st Issue rev. 6 | 05/2022
page 15 of 29
5.2.3 Setting Protocol
Protocol selection is made by sections 4 and 5 of the S3 DIP switch according to the table:
4
5
Protocol
Off (0)
Off (0)
Modbus RTU
Off (0)
On (1)
Modbus ASCII
On (1)
Off (0)
N/A
On (1)
On (1)
N/A
Table 6. Setting protocol
5.3 Modbus Configuration Registers
5.3.1 Device Address (30002)
This register contains information about the address of the Modbus device. This address
is set by using switches S1 and S2 (see Modbus Settings section).
5.3.2 Baud Rate and Protocol (30003)
The register contains information about the baud rate of COM1 port and the type of
protocol in accordance with the table below. This register reflects the state of the S3 DIP
switch.
Baud rate
Protocol
Bit 0
Bit 1
Bit 2
Baud rate
Bit 3
Bit 4
Protocol
0
0
0
User defined
0
0
Modbus RTU
0
0
1
76800
0
1
Modbus ASCII
0
1
0
4800
1
0
N/A
0
1
1
9600
1
1
N/A
1
0
0
19200
1
0
1
38400
1
1
0
57600
WARNING!
Changing the parameters configuring a transmission (except for registers which value
is read from the switch) will only take effect after restarting the device.