Siemens SINUMERIK 840D sl Commissioning Manual page 155

Contour monitoring
Monitoring of the difference between the following error measured and the following error
calculated from the position setpoint.
● MD36400 CONTOUR_TOL (contour monitoring tolerance range)
Error response
● Alarm: "25050 Contour monitoring"
and stopping the machine axis using a speed setpoint ramp whose characteristic is set in
● MD36610 AX_EMERGENCY_STOP_TIME (time for braking ramp when an error occurs)
Remedy
Contour errors are caused by signal distortions in the position control loop.
Remedy:
● Increase the tolerance band
● Checking the K
● Check optimization of the speed controller
● Check smooth running of the axes
● Check machine data for traversing motions
● For operation with feedforward control:
Encoder limit frequency monitoring
Monitoring of the limit frequency of the encoder of a machine axis.
● MD36300 ENC_FREQ_LIMIT (encoder limit frequency)
Error response
● Alarm: "21610 Encoder frequency exceeded"
● IS: DB31, ... DBX60.2 "Encoder limit frequency exceeded 1"
● IS: DB31, ... DBX60.3 "Encoder limit frequency exceeded 2"
and stopping the machine axis using a speed setpoint ramp whose characteristic is set in
● MD36610 AX_EMERGENCY_STOP_TIME (time for braking ramp when an error occurs)
IBN CNC: NCK, PLC, drive
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
factor:
V
The real K factor must correspond to the desired K
V
POSCTRL_GAIN[n] (K
HMI Advanced
Operating area DIAGNOSTICS > Service displays > Service axis
(Feedrate override, acceleration, max. velocities, ... )
MD32810 EQUIV_SPEEDCTRL_TIME (equivalent time constant speed control loop for
feedforward control) or if the machine data is imprecisely set, the MD36400
CONTOUR_TOL must be enlarged.
factor).
V
10.5 Parameterize axis data
factor, set via MD32200
V
NCK start-up
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