Siemens SINUMERIK 840D sl Function Manual page 389

03.06
© Siemens AG, 2006. All rights reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
10.2 NCK safety alarms for Sinumerik 840D sl
A criterion in a comparison list is compared between the NCK and drive
in each monitoring clock cycle (MD 10091); the next criterion is
compared in the next monitoring clock cycle etc. Once the complete
comparison list has been processed, the comparisons are processed
again from the start. The total comparison time to process the list is
displayed in MD 10092 (factor x MD 10091 – the factor can differ
depending on the SW version).
The "Error in a monitoring channel" Alarm is only output if the mutual
comparison of the two monitoring channels detects a difference
between 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 F01711) can be taken
from the diagnostics screen or the drive parameter r9725. 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
comparison operations of the comparison list. This means that the
displayed STOP F code value doesn't always provide a clear statement
regarding the cause of the fault. The associated procedure is then
explained for each of the individual fault codes.
The following fault codes are possible on the NCK side:
– 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 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
supplementary infos are also saved in drive parameters r9710[0] (NCK)
and r9710[1] (drive).
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
Diagnostics
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