Siemens SINUMERIK 808D ADVANCED Diagnostic Manual page 131

10891 [Channel %1: ] Block %2 multiplicity of node is greater than its order
Parameters: %1 = Channel number
%2 = Block number, label
Explanation: In the B spline the distance between nodes PL (node = point on spline at which 2 polynomials meet) has been programmed
with zero too often in succession (i.e. the "multiplicity" of a node is too great).
In the quadratic B spline the node distance may not be specified more than twice with 0 in succession, and in the cubic B
spline not more than 3 times.
Reaction: Correction block is reorganized.
Local alarm reaction.
Interface signals are set.
Alarm display.
Remedy: Program the node distance PL = 0 in succession no more than the degree of the B spline used.
Programm Clear alarm with NC START or RESET key and continue the program.
continuation:
10900 [Channel %1: ] Block %2 no S value programmed for constant cutting speed
Parameters: %1 = Channel number
%2 = Block number, label
Explanation: 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.
Programm 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
Explanation: When the path axis waveforms were analyzed during block preparation, a large local deviation relative to the path velocity
was detected in the velocity waveform of one or more path axes.
Such a situation can have the following causes:
- The path runs close to singular positions of the machine kinematics.
- The programmed contour characteristic is very uneven.
- The FGROUP definition is unfavorable relative to the contour.
- The setting MD28530 $MC_MM_PATH_VELO_SEGMENTS=0 is inadequate for curvature changes occurring within one
block. This problem occurs more frequently with G643, G644 and COMPCAD.
- A kinematic transformation has been implemented with insufficient numerical accuracy.
The path velocity is generally reduced substantially in order to avoid axis overloads safely. An apparent machine standstill
may occur. Severe axis movements occur suddenly as soon as the singular position is reached.
Reaction: Alarm display.
Warning display.
Remedy: Dividing a block into several smaller ones often provides an improvement.
If MD28530 $MC_MM_PATH_VELO_SEGMENTS=0 is set, then the alarm may be avoidable by a value MD28530
$MC_MM_PATH_VELO_SEGMENTS=3 or 5, as the blocks are then analyzed considerably more accurately.
Programm Clear alarm with NC START or RESET key and continue the program.
continuation:
Diagnostics Manual
Diagnostics Manual, 06/2015, 6FC5398-6DP10-0BA2
SINUMERIK 808D ADVANCED alarms
5.2 NCK alarms
131