Double Use Of The Handwheel - Siemens SINUMERIK 840D sl Function Manual

Supplementary conditions
With NC Stop present, no motion command and, therefore, no travel request is output. There
is an exception with DRF travel:
If DRF travel is permitted in the NC-Stop state via machine data
MD20624 $MC_HANDWH_CHAN_STOP_COND (bit 13 == 1),
the response corresponds to that of handwheel travel.
As for the motion command, the travel request is the sum of all the sub-movements, i.e., the
component from couplings and offset values is also taken into account.
Examples
In machine data
MD32084 $MA_HANDWH_STOP_COND (control of VDI signals relating to handwheel)
the feed stop is set as the abort criterion.
The "feed stop" PLC signal is present. Handwheel travel is selected (JOG mode, DRF travel
in AUTOMATIC mode).
The handwheel is turned in the positive direction:
The "feed stop" PLC signal is reset:
4.4.3

Double use of the handwheel

Alarm 14320
The double use of a handwheel for DRF and velocity or distance overlay, including contour
handwheel, is suppressed and is displayed using the self-clearing alarm 14320 (Handwheel
%1 used twice (%2) in channel %3 axis %4), if, different influences can act on an axis as a
result of the handwheel.
This means that an overlaid movement can only be executed when no DRF offset (triggered
by the same handwheel) is active for the axes in the basic coordinate system that are
involved in the movement, i.e., the DRF movement must have been terminated.
If an overlaid movement has been started, no DRF offset can be started for any of the axes
involved that are supplied by the same handwheel. Such a DRF movement is only possible
when the movement with overlay has reached its end point or has been aborted by delete
distance-to-go or RESET.
If the handwheel override and DRF offset are to be active simultaneously, this is possible
with activation of two separate handwheels.
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
H1: Manual travel and handwheel travel
4.4 Handwheel travel in JOG
The "travel request +" PLC signal is output from
axis/spindle; no motion command + is output from
axis/spindle.
No travel request, no motion command
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