NC Commissioning with HMI Advanced
11.5 Axes and spindles
Manual
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
427
The following machine data is used to define how long the speed setpoint may remain within
the limits before the speed setpoint monitoring responds.
●
MD36220 $MA_CTRLOUT_LIMIT_TIME[n] (delay time for speed setpoint monitoring)
Error reaction:
●
Alarm "25060 Speed setpoint limiting"
and stopping the machine axis using a speed setpoint ramp whose characteristic curve is set
in the following machine data:
●
MD36610 $MA_AX_EMERGENCY_STOP_TIME (braking ramp time when errors occur)
Causes of error/error handling:
●
A measuring circuit error or drive error is present.
●
Setpoints are too high (accelerations, velocities, reducing factors).
●
Obstacle in work area (e.g. positioning on a working table)
=> Overcome obstacle
The speed setpoint consists of the speed setpoint of the position controller and the
feedforward control parameter (if feedforward control is active).
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Figure 11-21 Speed setpoint calculation
NOTICE
The limitation of the speed setpoint will turn the control loop into a nonlinear control loop.
Generally, this will result in deviations from the contour and longer dwelling of the machine
axis within the speed setpoint limitation.