6 Alarms  11.03 
6.1  Alarms for SINUMERIK 840digital 
 
  © Siemens AG 2003 All Rights Reserved 
6-332  SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03 
27105 
Axis %1, difference in function safe cam minus %2, NCK: %3, 
drive: %4
 
Parameter  %1 = Axis number  
%2 = Number of cam 
%3 = Monitoring status, safe cam minus 
%4 = Monitoring status, safe cams minus 
Explanation  In the crosswise comparison of result list 2 between the monitoring channels, 
NCK and drive, a difference was detected in the monitoring state of the safe 
cam minus monitoring. 
- safe cam 1-: Bits 2, 3 in result list 2 
- safe cam 2-: Bits 6, 7 result list 2 
- safe cam 3-: Bits 10, 11 in result list 2 
- safe cam 4-: Bits 14, 15 result list 2 
Monitoring state (%3, %4): 
- OFF = monitoring inactive in this monitoring channel 
- OK = monitoring active in this monitoring channel, limit values not violated 
- L+ = monitoring active in this monitoring channel, upper limit value violated 
- L- = monitoring active in this monitoring channel, lower limit value violated 
Response Alarm display 
If safe monitoring was active, then STOP B was also automatically initiated. It is 
necessary to power-down the control and power it up again (power on). 
Remedy  Check that the safe actual values in both monitoring channels match. 
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 continuation  Clear the alarm with the RESET key. Restart part program. 
 
27106  Axis %1, difference in function safe velocity nx, NCK: %2, 
drive: %3
 
Parameter  %1 = Axis number  
%2 = Monitoring status, safely-reduced speed nx 
%3 = Monitoring status, safely-reduced speed nx 
Explanation  In the crosswise data comparison of result list 2 between the monitoring 
channels, NCK and drive, a difference was detected in the monitoring state of 
the safely-reduced speed nx monitoring. 
- safely-reduced speed nx+: Bits 16, 17 in result list 2 
- safely-reduced speed nx-: Bits 18, 19 in result list 2 
Monitoring state (%2, %3): 
- OFF = monitoring inactive in this monitoring channel 
- OK = monitoring active in this monitoring channel, limit values not violated 
- L+ = monitoring active in this monitoring channel, upper limit value violated 
- L- = monitoring active in this monitoring channel, lower limit value violated 
Response Alarm display 
If safe monitoring was active, then STOP B was also automatically initiated. It is 
necessary to power-down the control and power it up again (power on). 
Remedy  Check that the safe actual values in both monitoring channels match. 
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 continuation  Clear the alarm with the RESET key. Restart part program.