850 HEIDENHAIN Technical Manual MANUALplus 620
For clamped axes the PLC program must set the PP_AxClampModeRequest
signal shortly before unclamping at the latest, so that the MANUALplus 620
can distinguish the clamped axis from the normal axes and, at the end of the
movement, waits for the axis to be clamped again.
Clamping mode
with active
handwheel
If a handwheel is active for an axis in clamping mode, the axis may remain
switched on even if no further programmed movement of this axis is pending,
i.e. NN_AxInPosition is set.
For axes in clamping mode, the handwheel should not be activated during a
movement.
When switching an axis between clamped and unclamped mode, the
following constraints apply:
The PLC program must ensure that PP_AxClampModeRequest and
PP_AxDriveOnRequest are not switched during a movement. By
removing PP_AxFeedEnable of all NC axes, the PLC program can prevent
motions, for example. Otherwise, the error message Axes switched while
in motion can occur.
PLC operand / Description Ty p e
PP_AxClampModeRequest
Axis in clamping mode. Indicates that the
MANUALplus 620 must wait at the end of the axis
motion until the axis is clamped.
0: No clamping mode
Axis is to remain continuously in a closed loop
1: Clamping mode
Axis is to be clamped as soon as it is no longer
moved (NN_AxInPosition=1)
Axis is to be unclamped when it is to be moved
(NN_AxInPosition=0)
M
NN_AxInPosition
Axis in position
0: Axis not in position
1: Axis in position
M
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