Mitsubishi Electronics QD75P, QD75D user manual Phase/B phase mode, Pr.6 Rotation direction setting

5DATA USED FOR POSITIONING CONTROL

(3)A phase/B phase mode

MELSEC-Q

Forward run and reverse run are controlled with the phase difference of the A phase (A) and B phase (B).

•When the B phase is 90° behind the A phase, the motor will forward run.

•When the B phase is 90° ahead of the A phase, the motor will reverse run.

Positive logic		Negative logic
1) For multiple of 1 setting		1) For multiple of 1 setting
Forward run	Reverse run	Forward run	Reverse run
Command pulse output	Command pulse output	Command pulse output	Command pulse output

A phase
(A	)

B phase
(B	)

When B phase is	When B phase is	When B phase is	When B phase is
90° behind A phase	90° ahead of A phase	90° behind A phase	90° ahead of A phase

2) For multiple of 4 setting		2) For multiple of 4 setting
Forward run	Reverse run	Forward run	Reverse run
Command pulse output	Command pulse output	Command pulse output	Command pulse output

A phase
(A	)

B phase (B )

When B phase is	When B phase is	When B phase is	When B phase is
90° behind A phase	90° ahead of A phase	90° behind A phase	90° ahead of A phase

Pr.6

Rotation direction setting

Set the relation of the motor rotation direction and current value address increment/decrement.

[Setting procedure]

1)Set "0" in Pr.6 , and carry out forward run JOG operation. ("0" is set as the default value for Pr.6 .)

2)When workpiece "W" moves toward the address increment direction, keep the current setting.

When workpiece "W" moves toward the address decrement direction, set "1" in Pr.6 to change the rotation direction.

3)Carry out forward run JOG operation again, and if "W" moves toward the increment direction, the setting is complete.

	Address decre-		Address incre-
QD75	ment direction		ment direction
Motor		2) Workpiece

1) Forward run pulse

MW

OP3)

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