7 plc positioning – HEIDENHAIN TNC 407 (243 020) Technical Manual User Manual
Page 160
1.7 PLC positioning
The five axes of the control can also be positioned by the PLC. The spindle too can be positioned
with the aid of the PLC (see under "Main spindle"). The positions of the individual axes must be
stored as Doublewords (D528 to D544) before activating the positioning.
The feed for positioning the individual axes is stored in W560 to W568. The transfer of the
positions and the feed to the PLC is carried out, for example, by Q-parameters or machine
parameters (MP4210.X, MP4220.X).
Five of 5 axes (3 of 5 axes on TNC 407) can be traversed simultaneously [simultaneous activation of
all the strobe-markers (M2704 to M2708)].
The PLC positioning can be interrupted by resetting the strobe-marker (M2704 to M2708).
The NC resets the strobe-markers (M2704 to 2708) if:
−
the axes have reached the given position
−
there is an NC STOP in the manual or handwheel mode
−
NC STOP and internal stop in the automatic operating modes
−
EMERGENCY STOP is output
−
an error message is released that results in a stop
Strobe markers M2704 to M2708 may only be set when no program has started or when an M/S/T
strobe is present. In "Manual" mode the strobe markers may only be set when no axis direction key
has been pressed.
The Doublewords D528 to D544 have a multiple usage. They have the following meaning for the
PLC positioning:
Address
Function
D528
Position X axis [1/ 10 000 mm]
D532
Position Y axis
D536
Position Z axis
D540
Position 4th axis
D544
Position 5th axis
Feed for PLC-positioning
W560
Feed X axis [mm/min]
W562
Feed Y axis
W564
Feed Z axis
W566
Feed 4th axis
W568
Feed 5th axis
Marker
Function
Set
Reset
M2704
Activate PLC-positioning X axis
PLC
NC; PLC
M2705
Activate PLC-positioning Y axis
M2706
Activate PLC-positioning Z axis
M2707
Activate PLC-positioning 4th axis
M2708
Activate PLC-positioning 5th axis