You enable a parameter by setting a logical "1" at the corresponding bit.
Table A-4
Data record 1 for parameters of digital input modules
Byte
Bit
Meaning
Byte 4
7
On falling edge at channel 15
6
On falling edge at channel 14
5
On falling edge at channel 13
4
On falling edge at channel 12
3
On falling edge at channel 11
2
On falling edge at channel 10
1
On falling edge at channel 9
0
On falling edge at channel 8
Byte 5
Substitute value
1
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
Byte 6
Substitute value
1
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
1
Only for 6ES7 421-7BH0x-0AB0
Parameter sets of signal modules
A.2 Parameters of digital input modules
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08
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