Siemens SINUMERIK 840D sl Function Manual page 632

Diagnostics
11.2 NCK safety alarms for SINUMERIK 840D sl
27001 Axis %1 error in a monitoring channel, Code%2, values: NCK%3, drive %4
265
Result list 1 (see cross comparison value 1)
266
Switchover velocity SBH/SG MD37920 $MA_SAFE_STANDSTILL_VELO_LIMIT
Remedy
Check MD37920 $MA_SAFE_STANDSTILL_VELO_LIMIT.
267
Delay time, switchover to SBH/SG MD37920 $MA_SAFE_STANDSTILL_DELAY
Remedy
Check MD37922 $MA_SAFE_STANDSTILL_DELAY.
27001 Axis %1 error in a monitoring channel, Code%2, values: NCK%3, drive %4
Error fine codes that do not come from the crosswise data comparison
1000
The check timer has expired while the change timer has still not expired. If, in a monitoring channel, an SGE
change (e.g. SBH is selected), then the so-called change timer is started (timer value = MD36950/p9550).
In addition, what is known as a checking timer is started in the other channel (timer value = 10xMD36950).
While the change timer is running, if the same SGE is changed again, the timer value is extended and the
check timer in the other channel only runs once.
If the change timer is extended so often that the run time is greater than for the check timer then the fault is
output.
Too many signal changes were detected during the checking timer runtime.
Remedy
Determine the SGE involved and the associated hardware signal and investigate the situation. There may be
contact problems at the sensor (e.g. poor contact) or there were too many switching operations. If necessary,
the behavior can be improved by changing the timer setting.
1002
The user agreement is not consistent: The status of the user agreement is, after 4 s has expired, different for
both monitoring channels.
%3 = status of the user agreement, NCK.
%4 = status of the user agreement, drive.
This effect can occur if the user agreement is only set or reset through one channel. An additional fault cause
is that if the F-code 1003 only occurs in one monitoring channel and then the user agreement is only withdrawn
through one channel. This means that code 1002 is then the result of a code 1003 only in one channel.
Remedy
User agreement expired
1003
When the user agreement is set, the difference between the newly determined reference point (NC actual
value) after booting (absolute value encoder) or reference point approach [homing] (distance-coded or incre‐
mental measuring system) and the safe actual position (saved value + traversing distance) is greater than
the reference tolerance MD36944/p9544. In this case, the user agreement is withdrawn.
Remedy
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Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety Integrated