08/2005 Overview of Alarms
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© Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
Program Con-
tinuation:
Internal
400201 PLC STOP due to DB loading in the RUN state: DB%Z
Parameters: %Z = Data block
Definitions: An existing DB was reloaded in the RUN state.
Reactions: - Alarm display.
Remedy: Restart required.
Program Con-
tinuation:
Switch control OFF - ON.
400202 Access error
Definitions: The data could not be accessed
Reactions: - Alarm display.
Remedy: System error
Program Con-
tinuation:
Switch control OFF - ON.
400250 NCK sign-of-life monitoring
Definitions: NCK has not contacted the PLC during cyclic operation. Timer of FB1 parameter NCCy-
clTimeout was executed without retrigger.
Reactions: - Alarm display.
Remedy: NCK restart, do not use timer T0 through T9 in the user program.
Program Con-
tinuation:
Internal
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 param-
eter address MCP1Cycl or MCP2Cycl has been exceeded.
Reactions: - Alarm display.
Remedy: Enter the default values in FB1 correctly.
General NCK reset and restart, do not use timer T0 through T9 in the user program.
Increase the time values in FB1.
Program Con-
tinuation:
Internal
400252 Error in internal communication with NCK
Definitions: An error has occured during data transmission between the PLC and the NCK (FM-NC
only).
Reactions: - Alarm display.
Remedy: NCK restart
Program Con-
tinuation:
Internal
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.
Reactions: - 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).
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