Siemens SINUMERIK 802D sl Function Manual page 147

Movement in the opposite direction
Depending on MD11310 HANDWH_REVERSE, the behavior when the traversing direction is
reversed is as follows:
● MD value = 0:
● MD value > 0:
Response at software limit switches, working-area limitation
When axes are traversed in JOG mode, they can traverse only up to the first active limitation
before the corresponding alarm is output.
Depending on the machine data MD11310 HANDWH_REVERSE, the behavior is as follows
(as long as the axis on the setpoint side has not yet reached the end point):
● MD value = 0:
● MD value > 0:
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
If the handwheel is moved in the opposite direction, the resulting distance is computed
and the calculated end point is approached as fast as possible: If this end point is located
before the point where the moving axis can decelerate in the current direction of travel,
the unit is decelerated and the end point is approached by moving in the opposite
direction. If this is not the case, the newly calculated end point is approached
immediately.
If the handwheel is moved in the opposite direction by at least the number of pulses
indicated in the machine data, the axis is decelerated as fast as possible and all pulses
received until the end of interpolation are ignored. That means, another movement takes
place only after standstill (setpoint side) of the axis (new function).
The distance resulting from the handwheel pulses forms a fictitious end point which is
used for the subsequent calculations: If this fictitious end point is positioned, for example,
10 mm behind the limitation, these 10 mm must be traversed in the opposite direction
before the axis traverses again. If a movement in the opposite direction is to be
performed immediately after a limit, the fictitious distance-to-go can be deleted via IS
"Delete distance-to-go" (V380x 0002.2) or by deselecting of the handwheel assignment.
All handwheel pulses leading to an end point behind the limitation are ignored. Any
movement of the handwheel in the opposite direction leads to an immediate movement in
the opposite direction, i.e. away from the limitation.
Manual and Handwheel Travel (H1)
8.4 Handwheel traversal in JOG
147