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Siemens Simatic S7-400 User Manual

Page 191

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Digital Modules

4-69

S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07

4.18.1

Assigning Parameters to the SM 422; DO 16

20-125 VDC/1.5 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 421; DO 16

20-125 VDC/1.5 A

You will find an overview of the parameters you can set and their default settings
for the SM 422; DO 16

20-125 VDC/1.5 A in the following table.

Table 4-17 Parameters of the SM 422; DO 16

20-125 VDC/1.5 A

Parameter

Value Range

Default

2)

Parameter

Type

Scope

Enable

Diagnostic interrupt

1)

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

No load voltage L+

Short circuit to M

Yes/no

Yes/no

No

No

Static

Channel
group

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.

Assigning the “No Load Voltage L+” Diagnosis to Channel Groups

You can only set the “No Load Voltage L+” diagnosis separately for each channel
group. In other words, the setting for channel 0 applies to inputs 0 to 7, and the
setting for channel 8 applies to inputs 8 to 15.

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