Siemens SINUMERIK 840Di Diagnostic Manual page 474

Overview of Alarms
NCK alarms
27106 Axis %1 difference in function safe velocity nx, NCK: %2 drive: %3
Parameters: %1 = Axis number
%2 = Monitoring status safe velocity nx
%3 = Monitoring status safe velocity nx
Definitions: During cross-comparison of result list 2 a difference was detected between the NCK and drive
monitoring channels in the status of safe velocity monitoring.
- Safe velocity nx+: Bit 16, 17 in result list 2
- Safe velocity nx-: Bit 18, 19 in result list 2
Monitoring status (%2, %3):
- OFF = Monitoring is inactive in this monitoring channel
- OK = Monitoring is active in this monitoring channel, limit values are not violated
- L+ = Monitoring is active in this monitoring channel, upper limit exceeded
- L- = Monitoring is active in this monitoring channel, lower limit exceeded
Reaction: Alarm display.
If a safe monitoring was active, STOP B was also triggered automatically. In this case, a power
OFF/ON of the control will be required.
Remedy: Check whether the safe actual values in both monitoring channels are the same.
For further diagnostics, the drive machine data 1393, 1394 and the servo trace signals "Result list 2,
NCK" and "Result list 2, drive" can be used.
Program Clear alarm with the RESET key. Restart part program
Continuation:
27107 Axis %1 difference in function cam modulo monitoring, NCK: %2 drive:
%3
Parameters: %1 = Axis number
%2 = Monitoring status safe cam modulo range
%3 = Monitoring status safe cam modulo range
Definitions: During cross-comparison of result list 2 a difference was detected between the NCK and drive
monitoring channels in the status of cam modulo monitoring.
Safe cam modulo range: Bit 20, 21 in result list 2
Monitoring status (%2, %3):
- OFF = Monitoring is inactive in this monitoring channel
- OK = Monitoring is active in this monitoring channel, limit values are not violated
- L+ = Monitoring is active in this monitoring channel, upper limit exceeded
- L- = Monitoring is active in this monitoring channel, lower limit exceeded
Reaction: Alarm display.
If a safe monitoring was active, STOP B was also triggered automatically. In this case, a power
OFF/ON of the control will be required.
Remedy: Check whether the safe actual values in both monitoring channels are the same.
For further diagnostics, the drive machine data 1393, 1394 and the servo trace signals "Result list 2,
NCK" and "Result list 2, drive" can be used.
Program Clear alarm with the RESET key. Restart part program
Continuation:
2-474
© Siemens AG, 2006. All rights reserved
SINUMERIK, SIMODRIVE Diagnostics Manual (DA), 11/2006 Edition
11/2006