Siemens SINUMERIK 840D sl Function Manual page 304

H1: Manual travel and handwheel travel
4.4 Handwheel travel in JOG
Example: Path override
Assumption:
Channel 1 and geometry axis X correspond to machine axis 3 and geometry axis Y
corresponds to machine axis 5 and handwheel 2 is selected for the first geometry axis.
If block X10 Y10 FD=0 is processed in the main run, neither machine axis 3 nor machine
axis 5 can be traversed with DRF via handwheel 2. If handwheel 2 is assigned to machine
axis 3 while the channel-specific DRF signal is active, then alarm 14320 (Handwheel 2 used
twice (8) in channel 1 axis X) is signaled.
If machine axis 3 or machine axis 5 is traversed with DRF using the 2nd handwheel, then
motion X10 Y10 FD=0 cannot be executed and alarm 14320 (handwheel 2 used twice (3)
in channel 1 axis X) or alarm 14320 (handwheel 2 used twice (3) in channel 1 axis Y) is
signaled.
Example: Velocity override of positioning axis
Assumption:
Channel 1: Channel axis A corresponds to machine axis 4 and handwheel 1 is assigned to
this axis.
If block POS[A]=100 FDA[A]=0 is processed in the main run, machine axis 4 cannot be
traversed with DRF. This means that if the channel-specific DRF signal is active, alarm
14320 (Handwheel 1 used twice (6) in channel 1 axis A) is signaled.
If machine axis 4 is traversed with DRF, then no POS[A]=100 FDA[A]=0 movement can
be executed while a DRF movement is being performed. Alarm 14320 (Handwheel 1 used
twice (1) in channel 1 axis A) is signaled.
Example: Distance overlay PLC axis (840D sl)
Assumption:
Channel 1: Handwheel 2 is assigned to machine axis 4.
If an axis movement with path override of the 4th machine axis triggered by FC18 is
processed in the main run, machine axis 4 cannot be traversed with DRF. This means that if
the channel-specific DRF signal is active, alarm 14320 (Handwheel 2 used twice (9) in
channel 1 axis A) is signaled.
If machine axis 4 is traversed with DRF, then no axis movement with path override triggered
by FC18 can be executed while a DRF movement is being performed. Alarm 14320
(Handwheel 2 used twice (4) in channel 1 axis A) is signaled.
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Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions