Siemens Simatic S7-400

A.2 Parameters of digital input modules
Parameters
The table below lists the parameters you can set for digital input modules.
The comparison illustrates the parameters you can edit:
● In STEP 7
● Using SFC 55 "WR_PARM"
The parameters set with STEP 7 can also be transferred with SFCs 56 and 57 to the module
(refer to the STEP 7 manuals).
Table A-2 Parameters of digital input modules
Parameters Data record
number
Parameter assign‐
ment with SFC 55
Parameter assign‐
ment with STEP 7
Destination CPU for interrupt
0
No Yes
Input delay No Yes
Diagnostics No Yes
Hardware interrupt enable
1
Yes Yes
Diagnostics interrupt enable Yes Yes
Reaction to error* Yes Yes
Hardware interrupt at positive edge Yes Yes
Hardware interrupt at negative edge Yes Yes
Enable substitute value "1"* Yes Yes
* Only for 6ES7 421-7BH0x-0AB0
Note
If you want to enable the diagnostic interrupt in the user program in data record 1, you must
enable the diagnostics in data record 0 beforehand using STEP 7.
Structure of data record 1
A data record consists of several bytes, the bits of which can be active or inactive:
7 6 5 4 3 2 1 0
Figure A-1 For example, byte 1 with the bits 0 - 7
The figure below shows the structure of data record 1 (bytes 0, 1, 2 and 3) for the parameters
of digital input modules.
Parameter sets of signal modules
A.2 Parameters of digital input modules
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08 397