Error Messages - Siemens SIMATIC MOBY D System Manual

11.2 Error messages and causes for MOBY D with ASM and FC/FB 45 (direct MDS addressing)
11.2.2

Error messages

An error condition exists in FC/FB 45 whenever the "Error" variable is enabled on a channel.
If this is the case, the exact cause of the error can be determined from variable
"error_MOBY", "error_FC" or "error_BUS".
Table 11- 6
Error variable
error_MOBY
error_FC
error_BUS
Note
When several errors occur with chained commands, the "error variable" always indicates the
first error detected.
MOBY D
System Manual, 01/2010, J31069-D0147-A6-7618
Classification of error messages
Classification
This error was reported by the MOBY-ASM / write/read device.
There are two main reasons for this:
Communication between ASM and write/read device or between

write/read device and MDS is faulty.
The ASM/SLG is unable to process the command.

Error_MOBY is indicated on the ASM on the ERR LED with an appropriate
flashing pattern.
This error is signaled by FC/FB 45.
Main cause
There is a parameter error in "Params_DB" or "command_DB".

The transport layer of PROFIBUS DP is signaling an error. A PROFIBUS DP
tracer and a PROFIBUS DP tester (BT 200; Order No. 6ES7 181-0AA00-
0AA0) is an invaluable tool for accurate troubleshooting. The PROFIBUS DP
system diagnostics can provide further information about the cause of the
error. The error shown here is reported by the SFC 58/59 system function in
the RET_VAL parameter. For a detailed description of the RET_VAL
parameter, please refer to the SIMATIC S7 system manuals (see System
software for S7-300/400).
Alarm, error and system messages
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