Yaskawa MP2000 Series: Built-in SVB or SVB-01 Motion Module - Manual (Page 347)

9.3 Absolute Position Detection for Finite Length Axes
9.3.2 Setting the Zero Point for a Finite Length Axis
9-10
( 3 ) Saving OL 48 Values before Power OFF
After having set the zero point, save the value of OL 48 before turning OFF the power of Machine Controller so
that the value will be written in OL 48 the next time the power is turned ON.
There are two ways to save the Zero Point Position in Machine Coordinate System Offset (OL 48) value. It can be
saved through a ladder program in an M Register backed up by battery or from the MPE720 Parameter Window. These
ways are described below.
Method 1: Saving the Zero Point Position in Machine Coordinate System Offset (OL 48) from
the MPE720 Parameter Window
Open the Parameter Window for the specified axis on the MPE720 and use the following procedure to save the Zero
Point Offset.
1. Check the value in IL 10 in the Monitor Tab Page.
2.
Check the current value in OL 48 in the Setup Parameters Tab Page. Subtract the Calculated Posi-
tion (IL 10) from the Zero Point Position in Machine Coordinate System Offset (OL 48) and save
the result in OL 48.
3.
Check to see if the setting and current value in OL 48 are the same. If they are the same, select
File - Save and save the setting to the Machine Controller.
4.
Return to Module Configuration Window and select Save - Save to Flash to save the setting in the
flash memory.
5. Execute the setting with the ZSET command.
When the power is turned ON, the value that was saved will be stored automatically for Zero Point Position in Machine
Coordinate System Offset (OL
48).