Digital Modules
4-90 S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Changing Fuses
!Warning
This can result in injury.
If you change a fuse without removing the front connector of the module, you could
be injured by an electric shock.
Consequently, always remove the front connector before you change the fuse.
4.23.1 Assigning Parameters to the SM 422; DO 16 20-120 VAC/2 A
Parameter Assignment
You will find a description of the general procedure for assigning parameters to
digital modules in Section 5.7.

Parameters of the SM 422; DO 16 20-120 VAC/2 A

You will find an overview of the parameters you can set and their default settings
for the SM 422; DO 16 20-120 VAC/2 A in the following table.
Table 4-20 Parameters of the SM 422; DO 16 20-120 VAC/2 A
Parameter Value Range Default2) Parameter
Type Scope
Enable
•Diagnostic interrupt1) Yes/no No Dynamic Module
•Destination CPU for
interrupt 1 to 4 –Static Module
Reaction to CPU STOP Substitute a value (SV)
Keep last value (KLV) SV Dynamic Module
Diagnostics
•Fuse blown Yes/no No Static Channel
Enable substitute value
“1” Yes/no No Dynamic Channel
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 CC (central controller) is it possible to start up the digital modules with the default settings.