HEIDENHAIN TNC 335 Technical Manual - Manual (Page 129)

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TNC 360 1 Machine Axes 8/95
1.7 PLC positioning
The four axes of the control can also be positioned by the PLC. The spindle, too, can be positioned
with the aid of the PLC (see section "Spindle"). The positions of the individual axes must be stored as
Doublewords (D528 to D540) before activating the positioning (M2704 to M2707).
The feed for positioning the individual axes is stored in W560 to W566.
The transfer of the positions and of the feed to the PLC is carried out, for example, by
machine parameters (MP4210.X, MP4220.X). All four axes can be traversed simultaneously
[simultaneous activation of all the strobe markers (M2704 to M2706)]. The PLC positioning can be
interrupted by resetting the strobe marker (M2704 to M2706).
The NC resets the strobe marker (M2704 to 2707) when:
−
the axes have reached the given position
−
NC STOP occurs in the Manual or Handwheel operating mode
−
NC STOP and "internal stop" occur in the automatic operating modes
−
an EMERGENCY STOP occurs
−
an error message occurs that results in a stop
The strobe markers M2704 to M2707 may be set only if an M/S/T strobe is present. The M/S/T
acknowledgment must not occur until the PLC positioning has been completed, i.e. markers M2704
to M2707 have been reset.
Example:
M2045
M2482
M2704
In the Manual mode of operation the strobe markers M2704 to M2707 cannot be set if an axis
direction key is depressed.
The Doublewords D528 to D540 have a multiple usage. They have the following meaning for the
PLC positioning:
Address Function
D528 Position X axis [1/ 1000 mm]
D532 Position Y axis
D536 Position Z axis
D540 Position 4th axis
Feed rate for PLC positioning
W560 Feed rate X axis [mm/min]
W562 Feed rate Y axis
W564 Feed rate Z axis
W566 Feed rate 4th axis