Siemens Sinumerik 840C Diagnostics Manual page 48

1 Alarms
1.5.1 Alarm description
2503 Not enough memory available
Scan
When starting a program from external
S
Effect
NC START is interrupted
Explanation
The alarm is displayed
S
When the memory set in MD30 is not available for the program to be processed externally.
S
Remedy
Make sufficient part program memory available (delete part programs)
S
Lower value in MD30
Note
Channel-specific
2504 Emergency retract triggered
Scan
Cyclic in the servo cycle when LINK_ON for the following axis (from servo).
Effect
Machining interrupt, interlocking of NC START; removal of Mode Group Ready.
Explanation
The threshold MD "Emergency retraction threshold" programmed for monitoring of synchronism has been excee-
ded and emergency retraction triggered.
Prerequisite: Enable by means of PLC IS "Emergency retraction enabled".
Remedy
Inspect the drives; check the velocity and acceleration limit values of the following axis/spindle; check the emer-
gency retraction threshold; check the link factors.
Note
Applies as from SW 3. Alarm is displayed with reference to channel
2505 Error in NCK FB
Scan
During cyclic operation of control
Effect
Interlocking of NC START
Follow–up mode
Removal of Mode Group Ready
Interruption of machining
Explanation
The machine data for the SGE/SGA input/output allocations (46000 – 47999) have been entered incorrectly. The
incorrect MD No. is output in the alarm as block no. Nxxxxx.
Remedy
Correct the indicated machine data.
Continuation
No program can be started. Acknowledge alarm by RESET.
S
Note
The alarm 2505 is only output if configured correspondingly by the machine manufacturer. An error has
ocurred in the Safety–NCK–FB. For explanation and remedy, please refer to the machine manufacturer's doc-
umentation.
S
Applies as from SW 5.4
2506 Extended function outp. in target block
Scan
During block preprocessing in AUTOMATIC or MDA
Effect
Interlocking of NC–START
Explanation
The target block during block preprocessing cannot be a G511/G522 block, as the output of accumulated miscella-
neous functions and the extended output of the G511/G522 block collide functionally.
Remedy
Select another target block.
Note
Channel–specific reset alarm (as from SW 5.4), alarm is displayed with reference to channel
1–40
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SINUMERIK 840C / SIMODRIVE 611–D (DA)
04/96
07/97
Reset key
Reset key