Siemens SINUMERIK 840Di Diagnostic Manual page 144

Overview of Alarms
NCK alarms
10900 Channel %1 block %2 no S value programmed for constant cutting speed
Parameters: %1 = Channel number
%2 = Block number, label
Definitions: If G96 is active, the constant cutting speed under address S is missing.
Reaction: Correction block is reorganized.
Local alarm reaction.
Interface signals are set.
Alarm display.
Remedy: Program constant cutting speed under S in [m/min] or deselect the function G96. For example, with
G97 the previous feed is retained but the spindle continues to rotate at the current speed.
Program Clear alarm with NC START or RESET key and continue the program.
Continuation:
10910 Channel %1 block %2 irregular velocity waveform of one path axis
Parameters: %1 = Channel number
%2 = Block number, label
Definitions: On analyzing the path waveforms during preparation, a large local deviation in the velocity waveform
of one or more path axes has been detected relatively to the path velocity. A situation like that typically
occurs near singular positions of the machine kinematics. It can, however, also be caused by a failed
contour or by an FGROUP definition unfavorable relatively to the contour. Another reason may be an
unfavorable programmed OEM transformation.
In order to safely avoid axis overloads, path velocity is normally decelerated considerably. A
seemingly machine standstill might occur. As soon as the singular position has been reached, strong
axis movements suddenly occur.
Reaction: Local alarm reaction.
Alarm display.
Remedy: Dividing a block into several smaller ones often provides an improvement.
If $MC_MM_PATH_VELO_SEGMENTS=0 is set, then the alarm may be avoidable by a value
$MC_MM_PATH_VELO_SEGMENTS=3 or 5, as the blocks are then analyzed considerably more
accurately.
Program Clear alarm with the Delete key or NC START.
Continuation:
10911 Channel %1 block %2 transformation prohibits to traverse the pole
Parameters: %1 = Channel number
%2 = Block number, label
Definitions: The given curve passes through the pole of the transformation.
Reaction: Interpreter stop
Local alarm reaction.
NC Start disable in this channel.
Interface signals are set.
Alarm display.
Remedy: Modify part program.
Program Clear alarm with the RESET key. Restart part program
Continuation:
2-144
© Siemens AG, 2006. All rights reserved
SINUMERIK, SIMODRIVE Diagnostics Manual (DA), 11/2006 Edition
11/2006