
Parameter sets of signal modules
A.3 Parameters of digital output modules
S7-400 Automation System Module Data
Reference Manual, Edition 09/2009, A5E00850736-06
417
Byte Bit Meaning
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
Byte 1
Substitute
value
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
Byte 2
Substitute
value
0 Enable substitute value 1 on channel 8
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 Data record 1 for parameters of digital output modules
Byte Bit Meaning
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
Byte 3*
Substitute
value
0 Enable substitute value 1 on channel 16
7 Enable substitute value 1 on channel 31
6 Enable substitute value 1 on channel 30
5 Enable substitute value 1 on channel 29
4 Enable substitute value 1 on channel 28
3 Enable substitute value 1 on channel 27
2 Enable substitute value 1 on channel 26
1 Enable substitute value 1 on channel 25
Byte 4*
Substitute
value
0 Enable substitute value 1 on channel 26
* Bytes 3 and 4 are not relevant for SM 421;DO 16 x DC 20-125 V/1.5A
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