Siemens SINUMERIK 840D sl Series Diagnostics Manual page 131

08/2005
• Modify machine data
• Check whether SBL2 is activated. With SBL2, a block is generated from each part pro-
gram line which can lead to exceeding the maximum permissible number of empty blocks
between two traversing blocks.
Program Con- Clear alarm with NC START or RESET key and continue the program.
tinuation:
10891
Channel %1 block %2 multiplicity of node is greater than its order
Parameters: %1 = Channel number
%2 = Block number, label
Definitions: In the B spline the distance between nodes PL (node = point on spline at which 2 polyno-
mials 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
zero in succession, and in the cubic B spline not more than three times.
Reactions: - 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.
Program Con- Clear alarm with NC START or RESET key and continue the program.
tinuation:
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.
Reactions: - 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 Con- Clear alarm with NC START or RESET key and continue the program.
tinuation:
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 veloc-
ity 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 unfavor-
able 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.
Reactions: - Local alarm reaction.
- Alarm display.
© Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
Overview of Alarms
2-131