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1 parameters of the digital input modules – Siemens Simatic S7-400 User Manual

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Digital Modules

4-7

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

4.3.1

Parameters of the Digital Input Modules

The parameterized digital input modules use a subset of the parameters and
ranges of values listed in the table below, depending on functionality. Refer to the
section on a particular digital module, starting from Section 4.7, to find out which
subset it is capable of using.

Don’t forget that some digital modules have different time delays after parameter
assignment.

The default settings apply if you have not performed parameter assignment in
STEP 7.

Table 4-6

Parameters of the Digital Input Modules

Parameter

Value Range

Default

2

Parameter

Type

Scope

Enable

Diagnostic interrupt

1)

Hardware interrupt

1)

Yes/no
Yes/no

No
No

Dynamic

Module

Destination CPU for
interrupt

1 to 4

Static

Module

Diagnostics

Wire break

No load voltage
L+/sensor supply

Yes/no
Yes/no

No
No

Static

Channel

Trigger for hardware
interrupt

No

Dynamic

Channel

Rising (positive) edge

Falling (negative) edge

Yes/no

Yes/no

No
No

Dynamic

Channel

Input delay

0.1 ms (DC)
0.5 ms (DC)
3 ms (DC)
20 ms (DC/AC)

3 (DC)

Static

Channel

Reaction to error

Substitutea value (SV)
Keep last value (KLV)

SV

Dynamic

Module

Substitute“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 and
without HWCONFIG support.

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