SfAR-1M-2DI2DO User Manual
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DMP267en | 3rd Issue rev. 1 | 05/2022
page 10 of 17
Modbus Address
Decimal Address
Hex Address
Name
Values
40004
3
0x03
Data Bits
7 – 7 data bits
8 – 8 data bits
40006
5
0x05
Response Delay
Time in ms
40007
6
0x06
Modbus Mode
0 – RTU
1 – ASCII
Table 5. Configuration registers
4.6 Watchdog
This 16-bits register specifies the time in milliseconds to watchdog reset. If the module
does not receive any valid message within that time, all digital and analog outputs will be
set to the default state.
This feature is useful if there is an interruption in data transmission and for security
reasons. Output states must be set to the appropriate state in order to reassure the
safety of persons or property.
The default value is 0 milliseconds, which means the watchdog function is disabled.