Parameters Of Digital Input Modules - Siemens SIMATIC S7-400 Reference Manual

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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