Siemens SINUMERIK 840D Function Manual page 58

G2: Velocities, setpoint / actual value systems, closed-loop control
2.4 Setpoint/actual-value system
With the machine data:
MD32100 $MA_AX_MOTION_DIR (traversing direction)
the direction of motion of the axis can be reversed
without affecting the control direction of the position control.
Speed setpoint adjustment
In the case of speed setpoint comparison, the NC is informed which speed setpoint
corresponds to which motor speed in the drive, for parameterizing the axial control and
monitoring. This comparison is carried out automatically.
For PROFIBUS DP drives, alternatively, the manual speed setpoint comparison is also
possible.
● Manual adjustment
In the machine data:
MD32250 $MA_RATED_OUTVAL
a value not equal to zero is entered.
Note
Velocity adjustment and maximum speed setpoint
No speed compensation is required due to the automatic speed setpoint adjustment!
Maximum speed setpoint
The maximum speed setpoint is defined in percent. 100% means maximum speed setpoint or
maximum speed for PROFIdrive drives (manufacturer-specific setting parameters in the drive,
e.g. p1082 for SINAMICS).
The output of the spindle speed is implemented in the NC.
Data for five gear stages are realized in the controller.
These stages are defined by a minimum and maximum speed for the stage itself and by a
minimum and maximum speed for the automatic gear stage changeover. A new set gear stage
is output only if the new programmed speed cannot be traversed in the current gear stage.
With the machine data:
MD36210 $MA_CTRLOUT_LIMIT[n] (maximum speed setpoint)
the speed setpoint is restricted percentage-wise.
Values up to 200% are possible.
When the speed is exceeded, an alarm is generated.
58
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA