Mitsubishi Electronics QD75D, QD75P Precaution during control, Setting the OPR retry function

12CONTROL SUB FUNCTIONS

[2]Precaution during control

MELSEC-Q

(1) The following table shows whether the OPR retry function may be executed

by the "

Pr.43

OPR method".

		OPR method
	Pr.43		Execution status of OPR retry function
Near-point dog method			: Execution possible
Stopper method 1)			: Execution not possible
Stopper method 2)			: Execution not possible
Stopper method 3)			: Execution not possible
Count method 1)			: Execution possible
Count method 2)			: Execution possible

(2)Always establish upper/lower limit switches at the upper/lower limit positions of the machine, and connect an QD75 module. If the OPR retry function is used without hardware stroke limit switches, the motor will continue rotation until a hardware stroke limit signal is detected.

(3)Always wire QD75 upper/lower limit switches even when the OPR function is invalidated. Control cannot be carried out with the QD75 unless the wiring is carried out.

(4)Do not carry out settings so that the drive unit power turns OFF by the upper/lower limit switches connected to the QD75. If the drive unit power is turned OFF, the OPR retry cannot be carried out.

[3]Setting the OPR retry function

To use the "OPR retry function", set the required details in the parameters shown in the following table, and write them to the QD75.

When the parameters are set, the OPR retry function will be added to the machine OPR control. The set details are validated at the rising edge (OFF

ON) of the PLC READY signal (Y0). Set " according to the user's requirements.

Pr.57

Dwell time during OPR retry"

	Setting item		Setting	Setting details	Factory-set
			value		initial value
Pr.48		OPR retry	1	Set "1: Carry out OPR retry by limit switch".	0
		Dwell time during		Set the deceleration stop time during OPR retry.	0
Pr.57
		OPR retry		(Random value between 0 and 65535 (ms))

Refer to Section 5.2 "List of parameters" for setting details.

REMARK

•Parameters are set for each axis.

•It is recommended that the parameters be set whenever possible with GX Configurator-QP. Execution by sequence program uses many sequence programs and devices. The execution becomes complicated, and the scan times will increase.

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