Siemens SINUMERIK 840D sl Series Diagnostics Manual page 414

Overview of Alarms
A timer of 5 secs is started, after the expiry of which
• the external NCK SPL outputs are deleted
• the PLC changes to stop.
Remedy: Check the system components (the PLC must have the correct version of FB15 and
DB18).
Program Con- Switch control OFF - ON.
tinuation:
27093
Checksum error NCK-SPL, %1, %2, %3
Parameters: %1 = Extension indicating the type of error
%2 = Extension indicating the reference variable
%3 = Extension indicating the actual variable
Definitions: A checksum error has occurred 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 cor-
rupted. Parameter %1 indicates the type of modification:
• %1 = FILE_LENGTH: the file length has changed.
• %1 = FILE_CONTENT: the file contents have changed.
%2 specifies the reference variable (file length, checksum of file contents), %3 specifies
the actual variable which is calculated cyclically.
Reactions: - Alarm display.
Remedy: Check the file and the time of the last modification to the file. Reload the original file and
start the monitoring system again with a Power On.
Program Con- Switch control OFF - ON.
tinuation:
27094
Write access to system variable %1 only allowed from NCK-SPL
Parameters: %1 = Name of safety system variable concerned
Definitions: Write access to a safety system variable is only allowed from the part program
/_N_CST_DIR/_N_SAFE_SPF. If this error occurs, an instruction from another part pro-
gram was detected.
Reactions: - Alarm display.
Remedy: Check the part programs you are using for write accesses to safety system variables.
Program Con- Clear alarm with the RESET key. Restart part program
tinuation:
27095
%1 SPL protection not activated
Parameters: %1 = Name of the component on which the protection is not activated (NCK or PLC)
Definitions: The protection features are not activated for the SPL. The startup phase of the SPL is not
yet complete. No stop reaction (Stop D or E) was initiated on an error in data cross-com-
parison between NCK and PLC.
Reactions: - Alarm display.
Remedy: • Remedy for NCK: Activate the protection features with MD
$MN_PREVENT_SYNACT_LOCK[0,1]. The number range of the synchronized action
IDs used in the SPL must be entered in this MD.
• Remedy for PLC: Activate the protection features by setting the appropriate data bit in
DB18.
Program Con- Clear alarm with the RESET key. Restart part program
tinuation:
27096
SPL start not allowed
Definitions: To start the SPL in protected state (MD $MN_PREVENT_SYNACT_LOCK[0,1] not equal
0) Safety Integrated functionality must first be activated for at least one axis (via MD
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SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005