9.3
Absolute Position Detection for Finite Length Axes
9-11
( 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
MP2300 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 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.
îš„
Method 1: Saving in an M Register with Ladder Program
After setting the zero point, subtract the Calculated Position in the Machine Coordinate System
(IL

10) from the Machine Coordinate System Zero Point Offset (OL

48) and save the result in
an M register when it is stored in setting parameter OL

48. Store the contents saved in the M reg-
ister in Machine Coordinate System Zero Point Offset (setting parameter OL

48) every scan. This
way the value of OL

48 can be remained unchanged as long as another zero point setting is not
executed.
<Program Example>
The following diagram shows an example of ladder program to store the offset value of axis 1.
In a ladder program for an actual application, select a register with a different address for each axis.
Main Program
Rising edge of Zero Point Set signal detected.
Zero Point Offset - Calculated Position ⇒ Store in OL48.
Store offset saved in M register in OL48.
Signal that turns ON only when setting the Machine
Execute every scan in high-speed drawing.
Coordinate System Zero Point
To Next Page
Loading...
Need help?
General
