Mitsubishi Electric MELSERVO MR-J2S- A Instruction Manual page 329

15. ABSOLUTE POSITION DETECTION SYSTEM
If the address of the machine home position is changed to any coordinate value other than "0", the
programmable controller coordinate system will be as illustrated below.
The power should be turned ON/OFF in the range in which the address increases on moving away
from the home position.
Machine home position
Programmable
controller coordinate
0 20000 30000
system
ABS
20000
coordinate
system
Absolute position data can be detected
ABS coordinate value error occurs if
power is turned on within this range
* Home position address changed to "2000"
a) If revolution direction parameter (Pr. 14)
(c) In a positioning program, the address of the positioning point should be determined by adding the
home position address to the target position address.
Example) After home position return, execute positioning at 1) to 3).
1) Positioning at position address 80000
2) Positioning at position address 130000
3) Positioning at position address 0
ABS coordinate
error region
Programmable
controller
coordinate
0
system
ABS coordinate
50000
system
Stroke limit
Mechanical limit
Home position
70000
0 50000
Direction in which
address increases
0
(PC coordinate 140000)
(PC coordinate 190000)
(PC coordinate 60000)
Machine home position Home position (operation home
10000 50000
0
* Home position address changed to "50000"
Programmable
controller coordinate
system
ABS
coordinate
system
b) If revolution direction parameter (Pr. 14) 1
1)
(80000 60000)
position)
60000 100000
50000
(0 60000)
If revolution direction parameter (Pr. 14) 0
15 - 22
Machine home position
70000 30000
50000
Direction in which
address increases
Absolute position data can be detected
ABS coordinate value error occurs if
power is turned on within this range
* Home position address changed to "2000"
2)
(130000 60000)
150000
Direction in which
address increases
3)
Home position
20000 0
0 20000