Siemens Sinumerik 840C Diagnostics Manual page 80

1 Alarms
1.5.1 Alarm description
1256* Retraction axis is following axis
Scan
On decoding the retraction command
Effect
None
Explanation
Alarm occurs when a following axis is defined as retraction axis because the link is violated by the retraction.
Also, the overlay must be enabled by the PLC.
Remedy
Select another retraction axis.
Note
Applies as from SW 4
1260* Retraction axis in several channels
Scan
With configuration G425/6
Effect
Machining interrupt
Explanation
An axis has been programmed as retraction axis that has already been selected in another channel for retraction.
Remedy
Remove axis from the retraction block.
Note
Applies as from SW 4
1264* Sel./desel. endl. rot. axis illegal
Scan
On decoding
Effect
Machining interrupt
Explanation
An endlessly rotating rotary axis programmed for a retraction operation should be switched over to normal axis
operation.
Remedy
Before deselecting the endless rotary axis, write a G block without this rotary axis.
Note
Applies as from SW 4
1268* IKA path reconfiguration illegal
Scan
When programming G401/G411
Effect
Interlocking of NC Start
Interlocking of NC Stop
S
Explanation
An IKA path has been defined that is already configured.
S
An attempt has been made to delete with G411 an IKA path that is still active.
Remedy
Activate an IKA path that is not yet configured. On deselection: Switch IKA inactive.
1272* Error in IKA path input/output
Scan
When programming G401/411/G412
Effect
Interlocking of NC Start, NC Stop
Explanation
If an input/output value is specified with G410/G411/412 that does not correspond to the configuration or is not
permissible, this alarm is triggered.
Remedy
Specify input/output correctly or omit I/O designation with G410.
1276* Illegal software limit switch
S
Scan
After changing MD
S
Effect
Interlocking of NC START
S
Interlocking of Mode Group Ready
S
Interlocking of machining stops
Explanation
An impermissibly high value has been entered in the software limit switch NC MD. The maximum traversing range
of the individual axes is determined by the set axis-specific position control resolution and the input resolution. The
control entered the maximum permissible value in the relevant NC MD when alarm 87 was triggered.
Remedy
Check software limit switch machine data and correct if necessary.
Note
Applies as from SW 3
1–72
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Siemens AG 2001 All rights reserved 6FC5198–jAB40
SINUMERIK 840C / SIMODRIVE 611–D (DA)
04/96
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