SfAR-S-8DI8DO User Manual
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DMP275en | 3rd Issue rev. 2 | 05/2022
page 11 of 25
Addr
SW1
SW2
SW3
SW4
SW5
30
OFF
ON
ON
ON
ON
31
ON
ON
ON
ON
ON
Table 3. Setting module address in RS485 Modbus network, using DIP switch
4.4 Types of Modbus Functions
There are 4 types of Modbus functions supported by the SfAR modules.
Type
Beginning Address
Variable
Access
Modbus Command
1
00001
Digital Outputs
Bit
Read & Write
1, 5, 15
2
10001
Digital Inputs
Bit
Read
2
3
30001
Input Registers
Registered
Read
3
4
40001
Output Registers
Registered
Read & Write
4, 6, 16
Table 4. Types of Modbus functions supported by the module
4.5 Communication Settings
The data stored in the module's memory is given in the16-bit registers. The access to
registers is via Modbus RTU or Modbus ASCII.
4.5.1 Default Settings
The default configuration can be restored with the DIP switch, SW6.
Baud Rate
19200
Parity
No
Data Bits
8
Stop Bits
1
Reply Delay [ms]
0
Modbus Type
RTU
Table 5. Default settings
