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Siemens Simatic S7-400 User Manual

Page 133

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Digital Modules

4-11

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

Causes of Errors and Remedial Measures for Digital Modules

Table 4-9

Diagnostic Messages of the Digital Modules, Causes of Errors and Remedial
Measures

Diagnostic Message

Possible Error Cause

Remedy

Module malfunction

An error detected by the module
has occurred

-

Internal malfunction

The module has detected an error
within the programmable controller

-

External malfunction

The module has detected an error
outside the programmable controller

-

There is a channel
error

Indicates that only certain channels
are faulty

-

No external auxiliary
voltage

Voltage required to operate the
module is missing (load voltage,
sensor supply)

Supply missing voltage

No front connector

Jumper between connections 1 and
2 in the front connector missing

Install jumper

Parameters have not
been assigned to the
module

The module requires the information
as to whether it should work with
system default parameters or with
your parameters

Message queued after power-on until
parameter transmission by the CPU has
been completed; parameterize the
module, as required

Wrong parameters

One parameter or the combination
of parameters is not plausible

Reassign module parameter

Channel information
available

Channel error present; the module
can supply additional channel
information

-

Operating mode
STOP

Module was not parameterized and
the first module cycle has not been
completed

If after rebooting the CPU all the input
values are in the intermediate memory,
this message is reset

Internal voltage failure

Module is defective

Replace module

EPROM error

Module is defective

Replace module

Hardware interrupt lost

The module cannot send an
interrupt, since the previous
interrupt was not acknowledged;
configuration error possible

Change the interrupt handling in the CPU
(change priority for interrupt OB; shorten
interrupt program)

Parameter assignment
error

Incorrect parameters transferred to
the module (for example, impossible
input delay); the corresponding
channel is deactivated

Reassign module parameter

Short circuit to M

Overload of output

Eliminate overload

Short-circuit of output to M

Check the wiring of the outputs

Short circuit to L+

Short circuit of output to L+

Check the wiring of the outputs

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