Mitsubishi Electronics MR-J2S- A instruction manual 0PPS, Pii, Vii

15.ABSOLUTE POSITION DETECTION SYSTEM

(2)Sequence program example

(a)Conditions

1)Operation pattern

ABS data transfer is made as soon as the servo-on pushbutton is turned on. After that, positioning operation is performed as shown below:

Home position

3)

1)

3000000300000

address

2)

After the completion of ABS data transmission, JOG operation is possible using the JOG or JOG pushbutton switch.

After the completion of ABS data transmission, dog type home position return is possible using the home position return pushbutton switch.

2)Buffer memory assignment

For BFM#26 and later, refer to the FX2(N)-1PG User's Manual.

BMF No.
Upper 16	Lower 16	Name and symbol		Set value	Remark
bits	bits
-	#0	Pulse rate	A	2000
#2	#1	Feed rate	B	1000
-	#3	Parameter		H0000	Command unit: Pulses
#5	#4	Max. speed	Vmax	100000PPS
-	#6	Bias speed	Vbia	0PPS
#8	#7	JOG operation	Vjog	10000PPS
#10	#9	Home position return speed (high speed)	VRT	50000PPS
-	#11	Home position return speed (creep)	VCL	1000PPS
-	#12	Home position return zero-point signal count N		2 pulses	Initial value: 10
#14	#13	Home position address	HP	0
-	#15	Acceleration/deceleration time	Ta	200ms	Initial value: 100
-	#16	Not usable
#18	#17	Target address (I)	P(I)	0
#20	#19	Operation speed (I)	V(I)	100000	Initial value: 10
#22	#21	Target address (II)	P(II)	0
#24	#23	Operation speed (II)	V(II)	10
-	#25	Operation command		H0000

3)Instructions

When the servo-on pushbutton switch and the GND of the power supply are shorted, the ABS data is transmitted when the servo amplifier power is turned ON, or at the leading edge of the RUN signal after a PC reset operation (PC-RESET). The ABS data is also transmitted when an alarm is reset, or when the emergency stop state is reset.

If check sum discrepancy is detected in the transmitted data, the ABS data transmission is retried up to three times. If the check sum discrepancy is still detected after retrying, the ABS check sum error is generated (Y12 ON).

The following time periods are measured and if the ON/OFF state does not change within the specified time, the ABS communication error is generated (Y11 ON).

ON period of ABS transfer mode (Y1) ON period of ABS request (Y2)

OFF period of ready to send the ABS data (X2).

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