Siemens SINUMERIK 840D sl Function Manual page 654

Diagnostics
11.2 NCK safety alarms for SINUMERIK 840D sl
27093 Checksum error NCK-SPL, %1, %2, %3
Parameter %1 = supplementary information about the type of error
%2 = supplementary information about the reference size
%3 = supplementary information about the actual size
Explanation The checksum error in the NCK SPL. The file /_N_CST_DIR/_N_SAFE_SPF was subsequently modified. The
safe programmable logic (SPL) in the NCK may be corrupted. Parameter %1 provides further information
about the type of change:
%1 = FILE_LENGTH: The file length has changed.
%1 = FILE_CONTENT: The file contents have changed.
%1 = FILE_PROTECT: The access rights to the file are restricted and have been violated as the SPL com‐
missioning phase has been exited.
%2 specifies the variable calculated as the reference (file length, checksum over file contents),
%3 specifies the actual size calculated cyclically.
Response Alarm display
Remedy Check the file and when the file was last changed. Reload the original file and start the monitoring system
again with a power on.
Program con‐ Switch control system OFF and ON again.
tinuation
27095 %1 SPL protection not activated
Parameter %1 = name of the component for which the protection is not activated (NCK or PLC)
Explanation The protective mechanisms for the SPL have not been activated. The commissioning phase of the SPL has
not yet been completed. For an error in the crosswise data comparison between NCK and PLC, a stop
response (Stop D or E) is not initiated.
Response Alarm display
Remedy Remedy for NCK: Activate the protective mechanisms by writing to MD11500 $MN_PREVENT_SYN‐
ACT_LOCK [0,1]. The number range of the synchronized action IDs used in the SPL must be entered in this
MD.
Remedy for the PLC: Activate the protective mechanisms by setting the appropriate data bit in DB18.
Program con‐ Clear the alarm with the RESET key. Restart the part program.
tinuation
27096 SPL start not allowed
Parameter
Explanation To start the SPL in the protected state (MD11500 $MN_PREVENT_SYNACT_LOCK[0,1] not equal to 0), at
least one axis must have Safety Integrated functionality activated (via MD36901 $MA_SAFE_FUNCTION_EN‐
ABLE) beforehand, and operated with active drive.
In addition, at least one SGE/SGA of this axis must have been parameterized at an SPL interface. Without
this functionality it is only permissible to operate the SPL in the commissioning state.
Response Mode group not ready
Channel not ready
NC start disable in this channel
NC stop for alarm
Alarm display
Interface signals are set
654
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety Integrated