Siemens SINUMERIK 840D sl Function Manual page 461

05.08
© Siemens AG 2008 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
10.2 NCK safety alarms for SINUMERIK 840D sl
The "Error in a monitoring channel" Alarm is only output if the mutual
comparison of the two monitoring channels detects a difference be-
tween the input data or results of the monitoring. One of the monitoring
functions no longer operates reliably.
The crosswise comparison index, output under %2, is also known as
STOP F code. The STOP F code is also output in Alarm 27001 where
the NCK detected a crosswise comparison error for the first time.
The STOP F code of the drive (belonging to Alarm F30611) can be
taken from the diagnostics screen or the drive parameter r9795. If a
difference is detected at several comparison steps, then also several
STOP F code values can be displayed, alternating, at these positions.
There are fault profiles that are identified as a result of several compari-
son operations of the comparison list. This means that the displayed
STOP F code value does not always provide a clear statement regard-
ing the cause of the fault. The associated procedure is then explained
for each of the individual fault codes.
The following fault codes are possible:
0
No fault/error has been detected in this monitoring channel.
For alarm 27001 this means that it was one of the subsequent alarms
(follow–on alarms) of alarm F01711 – and the valid STOP F code value
is to be determined using the diagnostics display or the drive MD.
1
For the monitoring functions SBH, SG, SBR or SE, a different state has
occurred between the NCK and drive. The actual status image (result
list 1) is output from the NCK as supplementary input %3 (comparison
value, NCK) and the actual status image from the drive is output as
supplementary info %4 (comparison value, drive). The two supplemen-
tary infos are also saved in drive parameters r9710[0] and r9710[1].
An example for evaluating the bit–coded result list is provided in the
description of the drive machine data.
Remedy
The difference in the states between the drive and NCK should be
determined and the function involved should be investigated in more
detail.
Example:
State, NCK: SBH is active and ok
State, drive: SG1 is active and ok
The fault is caused due to the fact that the SGE "SBH deselection" is
controlled differently. The signal source should be checked on both the
NCK and drive sides. Generally, the different control (in operation) is a
result of a hardware failure associated with the sensor signal involved.
In the commissioning phase, the cause can also be parameterization or
programming errors.
2
For the monitoring function SN or n < n
between the NCK and drive.
The actual status image of the NCK (result list 2) is output as supple-
mentary info %3 (comparison value NCK) and the actual status image
Diagnostics
, a different state has occurred
x
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