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Digital modules

4.4 Diagnostics for digital modules

S7-400 Automation System Module Data

Reference Manual, Edition 09/2009, A5E00850736-06

101

4.4.3 Causes of errors and remedies for digital modules

Overview

Table 4- 7 Diagnostic messages of the digital modules, causes of errors and remedies

Diagnostic message Possible cause of error Remedy

Module error Any, the module has detected an

error.

Internal error Module has detected an error

within the automation system.

External error Module has detected an error

outside of the automation system.

Channel error Indicates that only certain channels

are faulty.

External auxiliary

voltage missing

Voltage required to operate the

module is missing (load voltage,

sensor supply).

Supply missing voltage

Front connector

missing

Jumper between connections 1

and 2 in the front connector is

missing.

Install jumper

No module

parameters

Module requires information

whether it should operate with

default system parameters or with

your parameters.

Message queued after power-on until

parameter transmission by the CPU has

been completed; configure the module,

as required.

Incorrect parameters One parameter, or the combination

of parameters, is not plausible.

Reassign parameters to the module

Channel information

available

Channel error; module can provide

additional channel information.

STOP mode No parameters have been

assigned to the module 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 the module

EPROM error Module is defective Replace the module

Hardware interrupt

lost

The module cannot send an

interrupt, since the previous

interrupt was not acknowledged;

possible configuration error.

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 parameters to the module

Overload at output Eliminate overload Short-circuit to M

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.

1 2 ... 96 97 98 99 100 101 102 103 104 105 106 ... 485 486

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