Mitsubishi Electronics QD75D, QD75P PULSE/SIGN mode, CW/CCW mode, Pr.5 Pulse output mode

5DATA USED FOR POSITIONING CONTROL

Pr.5 Pulse output mode

MELSEC-Q

Set the pulse output mode to match the servo amplifier being used.

IMPORTANT

The only valid value of the "

Pr.5

Pulse output mode" is the value at the moment

when the PLC READY signal [Y0] turns from OFF to ON for the first time after the power is switched ON or the PLC CPU is reset. Once the PLC READY signal [Y0] has been turned ON, the value will not be reset even if another value is set to the parameter and the PLC READY signal [Y0] is turned from OFF to ON.

Use " Pr.23 Output signal logic selection" to choose between the positive logic

(pulse rising edge detection) and negative logic (pulse falling edge detection). An example of the pulse output mode for positive and negative logic is shown below.

(1) PULSE/SIGN mode

Positive logic	Negative logic
Forward run and reverse run are controlled with the ON/OFF Forward run and reverse run are controlled with the ON/OFF
of the direction sign (SIGN).	of the direction sign (SIGN).

•The motor will forward run when the direction sign is HIGH. • The motor will forward run when the direction sign is LOW.

•The motor will reverse run when the direction sign is LOW. • The motor will reverse run when the direction sign is HIGH.

PULSE		PULSE
SIGN		SIGN
Forward	Reverse	Forward	Reverse
run	run	run	run
Move in + direction	Move in - direction	Move in + direction	Move in - direction

(2) CW/CCW mode

During forward run, the forward run feed pulse (PULSE F) will be output.

During reverse run, the reverse run feed pulse (PULSE R) will be output.

Positive logic	Negative logic
PULSE F	PULSE F
PULSE R	PULSE R

Forward run

Reverse run

Forward run Reverse run

5 - 23