Siemens Simatic M7-400, Reference Manual

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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