Yaskawa MP2200 Machine Controller - Manual (Page 398)

7 Absolute Position Detection
7.3.1 Finite Length Axis
7-14
( 2 ) Position Management with a Finite Length Axis
Initialize the axis position as described next when power is turned ON if an absolute encoder is used
for a finite length axis.
• Current position for the machine coordinate system = Encoder position when servo power is
turned ON *
+ Zero Point Offset (setting parameter OL††48)
* The encoder position when servo power is turned ON is as follows:
Multiturn data × Number of encoder pulses + initial increment pulses.
Refer to your SERVOPACK manual for information on the initial increment pulses.
The Zero Point Offset (setting parameter OL††48) is always valid for a finite length axis. If the
machine coordinate system zero point is changed during machine operation, the current position may
become inaccurate.
The meaning of setting parameter OL††48 will differ for a finite length axis and infinite length
axis.
• Finite Length Axis
Set OL††48 to the difference between IL††48 and OL††10 (IL††48 – OL††10) to
make the current position of the machine coordinate system the zero position.
IL††10 = 10,000 and OL††48 = 100
Setting the current position of the machine coordinate system to 0.
100
− 10000 = −9900 Set OL††48 to −9,900
IL††10: Target Position (CPOS)
EXAMPLE