Mitsubishi Electronics MR-J2S- A instruction manual ABS coordinate system

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			Home position			Machine home position Home position
Programmable					Programmable
controller coordinate					controller coordinate
system	0	20000	30000	70000	system	70000	30000 20000	0

ABS
	20000	0	50000
coordinate
			Direction in which
system
			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"

a)If revolution direction parameter (Pr. 14) 0

ABS coordinate system

50000		0	20000
	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"

b)If revolution direction parameter (Pr. 14) 1

(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 (PC coordinate 140000)

2)Positioning at position address 130000 (PC coordinate 190000)

3)Positioning at position address 0 (PC coordinate 60000)

ABS coordinate									1)
error region									(80000 60000)
Programmable			Machine home position		Hom			e position (operation home
												2)
controller										position)
												(130000			60000)
coordinate
	0 10000			50000	60	0	00		100000			1	50000
system
ABS coordinate
		50000		0					50000					Direction in which
system									(0		60000)
		Stroke limit												address increases
											3)

* Home position address changed to "50000"

Mechanical limit

If revolution direction parameter (Pr. 14) 0

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