December 2001 Datum Shift 6 – 399
6.20 Datum Shift
With the datum shift function you can offset the defined datum point.
The same initial position must apply for the description of the machine
geometry via MP7510 and following (See "Tilting Axes” on page 6 – 52) and
the datum shift.
You can activate the datum shift during an M/S/T/Q strobe.
Datum shift with
D528 to D544
7
77
7 In D528 to D544, enter for each axis the distance by which the datum is to
be shifted, or use Module 9230. For axes 6 to 9, use only Module 9230.
7
77
7 Activate the datum shift with M4132. After the datum shift the NC resets
M4132.
The offset is calculated into the position display — the display now shows the
position values according to the shifted coordinate system.
Example:
Actual value display for X axis without datum shift = 50
Shift value in D528 = +20
M4132 is set, i.e., datum shift is active
New actual value display X = +70 (the old datum receives the value 20).
Module 9230 Datum shift
With this module you transfer the axis and the amount by which the datum is
to be shifted.
M4132 is set when Module 9230 is called. After execution of the datum shift,
the NC resets M4132.
Call:
PS
B/W/D/K
<Axis [0 to 8]>
PS B/W/D/K <Shift [0.1 µm]>
CM 9230
Error recognition:
Set Reset
D528 Datum shift for axis 1 PLC PLC
D532 Datum shift for axis 2 PLC PLC
D536 Datum shift for axis 3 PLC PLC
D540 Datum shift for axis 4 PLC PLC
D544 Datum shift for axis 5 PLC PLC
M4132 Activate datum shift from D528 to D544,
or call Module 9230
PLC NC
Marker Value Meaning
M4203 0 No error
1 Error code in W1022
W1022 2 Invalid axis number
21 Missing strobe or control is active
24 Module was called in a spawn job or submit job
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