Siemens Sinumerik 840D sl Diagnostic Manual page 1012

Overview of Alarms
PLC alarms
400203 DB acces error: DB%Z
Parameters: %Z = Data block
Definitions: Data block is either not present or write-protected.
Reaction: Alarm display.
Remedy: The displayed DB has to be reloaded via STEP 7 or its write protection has to be removed. Restart
required.
Program Con- Switch control OFF - ON.
tinuation:
400204 Restart required
Definitions: DB generated by the basic program are different in size of existing DB.
Reaction: Alarm display.
Remedy: The DB is deleted during the next start-up and it is generated again by the basic program.
Program Con- Switch control OFF - ON.
tinuation:
400250 NCK sign-of-life monitoring
Definitions: NCK has not contacted the PLC during cyclic operation. Timer of FB1 parameter NCCyclTimeout was
executed without retrigger.
Reaction: Alarm display.
Remedy: NCK restart
Program Con- Internal
tinuation:
400251 NCK has not started up
Definitions: NCK has not contacted the PLC.
NCK has not ramped up.
Acknowledgement error during ramp-up: the time limit entered in OB1 / FB1 under parameter address
MCP1Cycl or MCP2Cycl has been exceeded.
Reaction: Alarm display.
Remedy: Enter the default values in FB1 correctly.
Carry out a general NCK reset and restart.
Increase the time values in FB1.
Program Con- Internal
tinuation:
400252 Error in internal communication with NCK
Definitions: An error has occured during data transmission between the PLC and the NCK (FM-NC only).
Reaction: Alarm display.
Remedy: NCK restart
Program Con- Internal
tinuation:
400253 PLC STOP because of SPL system error
Definitions: After the interruption of the communication between the NCK and the PLC with regard to the SPL data
cross-check, the PLC was switched to STOP with a delay of 5 s.
Reaction: Alarm display.
Remedy: Do no longer start SPL. Check the system components (PLC must be provided with the correct version
of FB15 and with DB18).
Program Con- Switch control OFF - ON.
tinuation:
400254 Checksum error found: %1
Parameters: %1 = Note on code section or table
Definitions: Checksum error in safety-relevant code or safety-relevant data. The safe monitoring functions (Safety
Integrated) in the PLC may be damaged.
Reaction: Alarm display.
Remedy: Power OFF/ON of the control. If the error occurs again, inform the service department.
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SINUMERIK 840D sl, 840Di sl, SINAMICS, Diagnostics Manual (DAsl), 03/2009
© Siemens AG 2009 All Rights Reserved
03/2009