Siemens Sinumerik 840D sl Function Manual page 642

Diagnostics
10.2 NCK safety alarms for Sinumerik 840D sl
27001
Parameter
Explanation
10-642
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
Axis %1 defect in a monitoring channel, code %2, values:
NCK %3, drive %4
%1 = axis name, spindle number
%2 = supplementary information, crosswise data comparison index
%3 = supplementary information, comparison value, NCK
%4 = supplementary information, comparison value, drive
The status of the safety--related monitoring functions are cyclically and
mutually compared between the two monitoring channels (NCK and
drive). The comparison is carried out separately for each NCK/drive
combination.
A criterion in a comparison list is compared between the NCK and drive
in each monitoring clock cycle (MD10091$MN_INFO_SAFETY_CY-
CLE_TIME); 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 resulting total
comparison time to process the list is displayed in MD10092
$MN_INFO_CROSSCHECK_CYCLE_TIME (factor x MD10091
$MN_INFO_SAFETY_CYCLE_TIME -- the factor can differ depending
on the particular software 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 monitor-
ing functions is no longer operating 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 C01711) can be taken
from the diagnostics screen or the drive parameter r9795. If a differ-
ence is detected at several comparison steps, then also several STOP
F code values can be displayed, alternating, at these positions.
There are error profiles that are identified as a result of several compar-
ison 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 error. The associated procedure is then explained for
each of the individual error codes.
0
No error has been detected in this monitoring channel.
Alarm 27001 means that it was one of the subsequent alarms (follow--
on alarms) of alarm C01711 -- and the valid STOP F code value is to be
determined using the diagnostics display or the drive parameter r9795.
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] (NCK) and
r9710[1] (drive).
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