Machine Data Of The Actual Value System - Siemens SINUMERIK 840D Function Manual

Figure 2-3
However, due to control processes, the axes should not reach their maximum velocity
(MD32000 $MA_MAX_AX_VELO) at 100% of the speed setpoint, but at 80% to 95%.
In case of axes, whose maximum speed is attained at around 80% of the speed setpoint range,
the default value (80%) of the machine data:
MD32000 $MA_MAX_AX_VELO (maximum axis velocity)
can be adopted.
2.4.5

Machine data of the actual value system

Axis-specific machine data
To parameterize the actual value system, the following axis-specific machine data should be
set:
Encoder and parameter set-independent machine data:
$MA_
MD30200 NUM_ENCS
MD30300 IS_ROT_AX
MD30310 ROT_IS_MODULO
MD30320 DISPLAY_IS_MODULO
MD30330 MODULO_RANGE
MD30340 MODULO_RANGE_START
MD31030 $MA_LEADSCREW_PITCH
MD31064 $MA_DRIVE_AX_RATIO2_DENOM
MD31066 $MA_DRIVE_AX_RATIO2_NUMERA
MD32000 $MA_MAX_AX_VELO
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
G2: Velocities, setpoint / actual value systems, closed-loop control
Maximum speed setpoint
2.4 Setpoint/actual-value system
Meaning
Number of encoders
Rotary axis / spindle
Modulo conversion for rotary axis / spindle
360-degree modulo display for rotary axis or
spindle
Size of the modulo range
Start position of the modulo range
Leadscrew pitch
Intermediate gear denominator
Intermediate gear numerator
Maximum axis velocity
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