Parameters Of Digital Input Modules - Siemens SIMATIC S7-400 Reference Manual
Automation system module
data
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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
Destination CPU for interrupt
Input delay
Diagnostics
Hardware interrupt enable
Diagnostics interrupt enable
Reaction to error*
Hardware interrupt at positive edge
Hardware interrupt at negative edge
Enable substitute value "1"*
* 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
Figure A-1
The figure below shows the structure of data record 1 (bytes 0, 1, 2 and 3) for the parameters
of digital input modules.
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08
Parameters of digital input modules
Parameters
5 4 3 2 1 0
For example, byte 1 with the bits 0 - 7
Parameter sets of signal modules
A.2 Parameters of digital input modules
Data record
Parameter assign‐
number
ment with SFC 55
No
0
No
No
Yes
1
Yes
Yes
Yes
Yes
Yes
Parameter assign‐
ment with STEP 7
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
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