Yaskawa JAPMC-MC2300 - Manual (Page 292)

10.4 Absolute Position Detection for Infinite Length Axes
10.4.5 Turning ON the Power after Setting the Zero Point for Simple Absolute Infinite Length Axes
10-21
10
Absolute Position Detection
( 3 ) Saving OL 48 Values at 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.
Refer to Method 1: Saving the Zero Point Position in Machine Coordinate System Offset (OL
48) from the
MPE720 Parameter Window on page 10-11 and Method 2: Saving in an M Register with a Ladder Program on page
10-12 for more details.
10.4.5 Turning ON the Power after Setting the Zero Point for Simple Absolute Infinite
Length Axes
The Zero Point Return (Setting) Completed bit (IW 0C, bit 5) will turn OFF when the power supply to the Machine
Controller is turned OFF and ON, the communication are interrupted by the power OFF to the SERVOPACK, or com-
munication are interrupted in any other reason after the zero point has been set. The Zero Point Return (Setting) Com-
pleted bit must therefore be turned back ON when the power supply is restored.
Use the following procedure.
1.
Turn ON the power supply to the Machine Controller.
The offset saved in the M register is stored in OL 48.
2.
Check the Motion Controller Operation Ready (SVCRDY) bit.
Check to see if the Motion Controller Operation Ready (SVCRDY) bit (IW 00 bit 0) is ON.
3.
Execute the Zero Point Setting (ZSET) motion command by setting OW 08 to 9.
Use this procedure only to turn ON the Zero Point Return (Setting) Completed bit (IW 0C, bit 5). It cannot be
used to set the zero point of the machine coordinate system (OL 48).