Siemens SIMATIC S7-400 Reference Manual page 401

You enable a parameter by setting a logical "1" at the corresponding bit.
Table A-6
Byte 0
Byte 1
Substitute
value
Byte 2
Substitute
value
The following table shows the structure of data record 1 (bytes 3, and 4) for the parameters of
digital output modules.
You enable a parameter by setting a logical "1" at the corresponding bit.
Table A-7
Byte 3*
Substitute
value
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08
Data record 1 for parameters of digital output modules
Byte Bit
7
6 Diagnostics interrupt enable
5
4
3
2
1
0 Reaction to CPU STOP
7 Enable substitute value 1 on channel 7
6 Enable substitute value 1 on channel 6
5 Enable substitute value 1 on channel 5
4 Enable substitute value 1 on channel 4
3 Enable substitute value 1 on channel 3
2 Enable substitute value 1 on channel 2
1 Enable substitute value 1 on channel 1
0 Enable substitute value 1 on channel 0
7 Enable substitute value 1 on channel 15
6 Enable substitute value 1 on channel 14
5 Enable substitute value 1 on channel 13
4 Enable substitute value 1 on channel 12
3 Enable substitute value 1 on channel 11
2 Enable substitute value 1 on channel 10
1 Enable substitute value 1 on channel 9
0 Enable substitute value 1 on channel 8
Data record 1 for parameters of digital output modules
Byte Bit
7 Enable substitute value 1 on channel 23
6 Enable substitute value 1 on channel 22
5 Enable substitute value 1 on channel 21
4 Enable substitute value 1 on channel 20
3 Enable substitute value 1 on channel 19
2 Enable substitute value 1 on channel 18
1 Enable substitute value 1 on channel 17
0 Enable substitute value 1 on channel 16
Parameter sets of signal modules
A.3 Parameters of digital output modules
Meaning
Meaning
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