Siemens SINUMERIK 840D sl Function Manual page 180

H1: Manual and handwheel travel
4.6 Handwheel travel
Example 2: Handwheel travel, stop condition is an abort criterion
If a stop condition is selected as an abort criterion via machine data
MD32084 $MA_HANDWH_STOP_COND or
MD20624 $MC_HANDWH_CHAN_STOP_COND during handwheel travel, no travel
command is output, but the corresponding travel request is output.
When the stop condition is removed, the corresponding "Travel request" NC/PLC interface
signal is reset, as an abort is present. The stop condition is no longer active, but the axis cannot
be traversed as the stop condition has caused an abort.
In addition, either the distance specification (MD11346 $MN_HANDWH_TRUE_DISTANCE
== 1 or == 3) is active or the handwheel is moved continuously, i.e. it provides pulses.
Figure 4-3
If a stop condition is activated during the handwheel travel, the motion is aborted and the
"Travel request" and "Travel command" NC/PLC interface signals are reset.
Example 3: Handwheel travel with velocity specification, stop condition is an abort criterion
If the handwheel is no longer moved for velocity specification
(MD11346 $MN_HANDWH_TRUE_DISTANCE == 0 or == 2), the "Travel request" NC/PLC
interface signal is reset.
The "Travel request" PLC signal is also reset when the handwheel is deselected.
180
Signal-time diagram:Handwheel travel, stop condition is an abort criterion
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions