Siemens Simatic S7-400

4.3.2 Parameters of digital input modules
Overview
The configurable digital input modules use a subset of the parameters and ranges of values
listed in the table below, depending on functionality. For information on subsets "supported"
by specific digital modules, refer to the chapter dealing with the relevant module. Do not forget
that some digital modules have different input delays after parameter assignment.
The defaults apply if you have not set any parameters in
STEP 7 .
Table 4-4 Parameters of digital input modules
Parameters Value range Default
2
Parameter
type
Scope
Enable
● Diagnostic interrupt
1
Yes/no No Dynamic Module
● Hardware interrupt
1
Yes/no No
● Destination CPU for
interrupt
1 to 4 - Static Module
Diagnostics
● Wire break
Yes/no No Static Channel
● No load voltage L+/sensor
supply
Yes/no No
Hardware interrupt trigger
● Positive edge
Yes/no No Dynamic Channel
● Negative edge
Yes/no No
Input delay 0.1 ms (DC)
0.5 ms (DC)
3 ms (DC)
20 ms (DC/AC)
3 (DC) Static Channel
Reaction to error Set substitution
value (SSV)
Keep last value
(KLV)
SV Dynamic Module
Set substitution value "1" Yes/no No Dynamic Channel
3
1
If you use the module in ER-1/ER-2, you must set this parameter to "No" because the interrupt lines
are not available in ER-1/ER-2.
2
Only in the CR (central rack) is it possible to start up the digital modules with the default settings and
without support from HWCONFIG.
3
Channels not selected for substitute value "1" are assigned substitute value "0".
Digital modules
4.3 Assigning parameters to digital modules
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08 87