Siemens SINUMERIK 840D sl Function Manual page 604

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
For the monitoring function SN or n < n
The actual status image of the NCK (result list 2) is output as supplementary info %3 (comparison value NCK)
and the actual status image from the drive is output as supplementary info %4 (comparison value, drive). The
two result lists are also written to as parameter r9711[0] (NCK) and r9711[1] (drive). An example for evaluating
the bit-coded result list is provided in the description of the drive parameter.
Remedy
The difference in the states between the drive and NCK should be determined and the function involved
should be investigated in more detail.
3
The difference between the safe actual value NCK and drive is greater than that set in MD36942
$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 MD36949 $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 configuration and the encoder signals
4 not assigned
5
The setting in MD36901 $MA_SAFE_FUNCTION_ENABLE does not correspond with the associated drive
parameter assignment.
Remedy
Copy SI data
6
The setting in MD36931 $MA_SAFE_VELO_LIMIT[0] does not correspond with the associated drive param‐
eter assignment.
Remedy
Copy SI data
7
The setting in MD36931 $MA_SAFE_VELO_LIMIT[1] does not correspond with the associated drive param‐
eter assignment.
Remedy
Copy SI data
8
The setting in MD36931 $MA_SAFE_VELO_LIMIT[2] does not correspond with the associated drive param‐
eter assignment.
Remedy
Copy SI data
9
The setting in MD36931 $MA_SAFE_VELO_LIMIT[3] does not correspond with the associated drive param‐
eter assignment.
Remedy
604
, a different state has occurred between the NCK and drive.
x
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety Integrated