15
Tables 04.00
15.2 List of s
stem variables
15
ï›™
Siemens AG 2000. All rights reserved
15-564
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
15.2.45 Axial velocities
Identifier Type Description: System variable/value range/index Part pro Sync O S
$AA_OVR
REAL $AA_OVR[X]
Axial override for motion-synchronized actions
Multiplicative override component acting in addition to the user OV,
programmed OV and transformatory OV; the overall factor is limited
to a maximum of 200% however.
Must be rewritten in every interpolator cycle, otherwise the value is
100%.
The spindle override is changed with $AA_OVR[S1].
The override defined by machine data
$MN_OVR_FACTOR_LIMIT_BIN,
$MN_OVR_FACTOR_FEEDRATE[30],
$MN_OVR_FACTOR_AX_SPEED[30] and
$AA_OVR_FACTOR_SPIND_SPEED
is not exceeded
This variable can only be accessed from motion-synchronized actions
Axes: Channel axis
RW 2
$AA_VC
REAL $AA_VC[X]
Additive axial feed compensation for motion-synchronized actions
It must be rewritten in every interpolator cycle, otherwise the value is
0.
With an override of 0, the compensation value has no effect,
otherwise the override has no impact on the compensation value.
The compensation value cannot make the total feedrate negative.
The upper value is limited such that the maximum axis velocities and
accelerations are not exceeded.
The computation of the other feedrate components is not affected by
$AA_VC.
The override values defined by machine data
$MN_OVR_FACTOR_LIMIT_BIN,
$MN_OVR_FACTOR_FEEDRATE[30],
$MN_OVR_FACTOR_AX_SPEED[30] and
$MN_OVR_FACTOR_SPIND_SPEED
cannot be exceeded. The additive feedrate override is limited such
that the resulting feedrate does not exceed the maximum override
value of the programmed feedrate.
Axes: Channel axis
RW 2
$AA_VACTB
REAL $AA_VACTB[X]
Axis velocity in the base coordinate system
This variable can only be accessed from synchronized actions
Axes: Channel axis
RS R 2
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