Siemens SINUMERIK 840Di Diagnostic Manual page 368

Overview of Alarms
NCK alarms
20079 Channel %1 axis %2 oscillation path length %3 <= 0
Parameters: %1 = Channel number
%2 = Axis number
%3 = Length
Definitions: The axis is traversed as an oscillating axis and the distance to be traversed is smaller than or equal
to zero. For example, both reversal points are situated on an identical position, one reversal point was
shifted against the oscillating direction beyond the other reversal point. The axis is not traversed.
Reaction: Local alarm reaction.
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy: Specify correct target position (reversal position, end position).
Program Clear alarm with the RESET key. Restart part program
Continuation:
20080 Channel %1 axis %2 no handwheel assigned for overlaid motion
Parameters: %1 = Channel number
%2 = Axis number
Definitions: No handwheel has been assigned for this specified axis after handwheel overlay has been started in
automatic mode. If the axis identifier is missing in the alarm with active velocity overlay FD > 0, then
the 1st geometry axis has not been defined in the NC channel. In this case the block is executed
without handwheel control.
Reaction: Alarm display.
Remedy: If handwheel control is required, a handwheel must be activated.
Program Alarm display showing cause of alarm disappears. No further operator action necessary.
Continuation:
20081 Channel %1 axis %2 braking position cannot be accepted as a new
reversing position
Parameters: %1 = Channel number
%2 = Axis number
Definitions: On changing the reciprocation reversal from external sources, the braking position
cannot be accepted as a new reversing position, since changing the reversal point via handwheel or
JOG key is active.
Reaction: Alarm display.
Remedy: Deselect VDI signal "Change reversal point" and reselect it either
- with "Reciprocation reversal from external sources" or
- by changing the reversal point by means of handwheel or
- by changing the reversal point via JOG key.
Program Alarm display showing cause of alarm disappears. No further operator action necessary.
Continuation:
2-368
© Siemens AG, 2006. All rights reserved
SINUMERIK, SIMODRIVE Diagnostics Manual (DA), 11/2006 Edition
11/2006