Special Features Of Handwheel Override In Automatic Mode - Siemens SINUMERIK 840D Function Manual

N10 G01 X10 Y100 Z200 FD=1500 . . .
X10 Y100 Z200
FD=1500
Concurrent positioning axis
The handwheel override for concurrent positioning axes is activated from the PLC via FC18 by
setting the appropriate interface signal:
DB31, ... DBX62.1 (handwheel override active)
If the velocity parameter (F_Value) is transferred with the value 0, then the activated handwheel
override acts as distance input, i.e. in this case, the feed is not derived from the axial machine
data (see also Section "P2: Positioning axes (Page 185)"):
MD32060 $MA_POS_AX_VELO (initial setting for positioning axis velocity)
Further information
Function Manual PLC
17.13.1.3

Special features of handwheel override in automatic mode

Velocity display
The velocity display for handwheel override shows the following values:
● Set velocity
= programmed velocity
● Actual velocity
= resultant velocity including handwheel override
Effect on transverse axes
If the axis is defined as a transverse axis and DIAMON is active, the handwheel pulses are
interpreted and traversed as diameter values while handwheel override is active.
Dry-run feedrate
With active dry run
DB21, ... DBX0.6 (activate dry-run feedrate) = 1,
the dry-run feedrate is always effective
SD42100 $SC_DRY_RUN_FEED.
In this way, the axis is traversed to the programmed target position at dry-run feedrate without
any influence from the handwheel despite the active handwheel override with path default
(FDA[AXi] = 0), i.e., the path default is ineffective.
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
17.13 Use of handwheels in automatic mode
Target position of path axes X, Y and Z
Activate velocity override for path axes; path velocity = 1500 mm/
min
H1: Manual traversing
709