Siemens Simatic M7-400 Reference Manual page 281

Note
A prerequisite for detecting the errors indicated by programmable diagnostic
messages is that you must have assigned parameters to the analog module
accordingly in STEP 7.
Causes of Errors and Remedial Measures for Analog Input Modules
Table 5-47 Diagnostics Messages of the Analog Input Modules, Causes of Errors and Remedial
Measures
Diagnostics
Message
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 Indicates that only certain channels
error are faulty
No external auxiliary Load voltage to supply the 2-wire
voltage transmitter is missing on terminals
L+ and M
No front connector Jumper between connections 1 and
2 in the front connector missing
Parameters have not The module requires the information
been assigned to the as to whether it should work with
module system default parameters or with
your parameters
Wrong parameters A parameter or combination of
parameters is incorrect;
impermissible measurement range,
for example
Channel information Channel error present; the module
available can supply additional channel
information
Measuring range One or more measuring range
module modules is missing or incorrectly
incorrect/missing inserted
STOP operating mode Module not parameterized and the
first module cycle not completed
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Possible Error Cause
Analog Modules
Remedy
-
-
-
-
Feed supply L+
Install jumper
Message queued after power-on until
parameter transmission by the CPU has
been completed; parameterize the
module, as required
Reassign module parameter
-
Insert the measuring range modules on the
module according to the parameter
assignment of the type of measurement
and the measurement range
If a reboot of the CPU all the digitized
analog values are in the intermediate
memory, this message is reset
5-65