Siemens Simatic M7-400 Reference Manual page 149

4.9.1 Assigning Parameters to the SM 421; DI 16
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 421; DI 16
You will find an overview of the parameters you can set and their default settings
for the SM 421; DI 16
Table 4-10 Parameters of the SM 421; DI 16
Parameter
Enable
•
1)
Diagnostic interrupt
•
1)
Hardware interrupt
•
Destination CPU for
interrupt
Diagnostics
•
Wire break
•
No load voltage
L+/sensor supply
Trigger for hardware
interrupt
•
Rising edge
•
Falling edge
Input delay
Reaction to Error
Enable substitute value "1"
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.
Assignment of the Encoder Supplies to Channel Groups
The two encoder supplies of the module are used to supply two channel groups:
inputs 0 to 7 and inputs 8 to 15. In these two channel groups, you parameterize the
diagnostics for the encoder supply, too.
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
24 VDC
24 VDC in the table below.
24 VDC
Value Range
Yes/no
Yes/no
1 to 4
Yes/no
Yes/no
Yes/no
Yes/no
3 ms (DC)
0.1 ms (DC)
0.5 ms (DC/AC)
Substitute a Value (SV)
Keep Last Value (KLV)
Yes/no
Digital Modules
24 VDC
2)
Default Parameter
Type
Dynamic Module
No
No
–
Static Module
Channel
No
Static Channel
No
group
Dynamic Channel
– Dynamic Channel
3 (DC) Static Channel
group
SV Dynamic Module
No Dynamic Channel
Scope
4-27