Siemens SINUMERIK 840D sl Function Manual page 462

Diagnostics
10.2 NCK safety alarms for SINUMERIK 840D sl
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
from the drive is output as supplementary info %4 (comparison value,
drive). The two result lists are also written into as parameter r9711[0]
and r9711[1]. An example for evaluating the bit–coded result list is pro-
vided in the description of the drive parameter.
Remedy
The difference in the states between the drive and NCK should be de-
termined and the function involved should be investigated in more de-
tail.
3
The difference between the safe actual value NCK and drive is greater
than that set in MD 36942 $MA_SAFE_POS_TOL.
When using the actual value synchronization, the difference of the
speed (determined based on the safety actual values) is greater than
that set in MD 36949 $MA_SAFE_SLIP_VELO_TOL.
Remedy
Commissioning phase:
The encoder evaluation for the NCK and drive is not correctly set –>
correct the encoder evaluation.
In operation:
The actual values differ due to mechanical faults (transmission belts,
traversing to mechanical limit, wear and tolerance windows that have
been set too narrow, encoder faults...)
–> check the mechanical design and the encoder signals
4
Not assigned.
5
The setting in MD 36901 $MA_SAFE_FUNCTION_ENABLE does not
correspond with the associated drive parameter assignment.
Remedy
Copy SI data
6
The setting in MD 36931 $MA_SAFE_VELO_LIMIT[0] does not corre-
spond with the associated drive parameter assignment.
Remedy
Copy SI data
7
The setting in MD 36931 $MA_SAFE_VELO_LIMIT[1] does not corre-
spond with the associated drive parameter assignment.
Remedy
Copy SI data.
8
The setting in MD 36931 $MA_SAFE_VELO_LIMIT[2] does not corre-
spond with the associated drive parameter assignment.
Remedy
Copy SI data.
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05.08