Mitsubishi Electronics QD75D, QD75P user manual Pr.8 Speed limit value

5DATA USED FOR POSITIONING CONTROL

[Table 1]

MELSEC-Q

	setting value		Value set with peripheral device (unit)		Value set with sequence program (unit)
Pr.1
	0	: mm	0 to 20000000.00 (mm/min)		0 to 2000000000 (×10-2mm/min)
	1	: inch	0 to 2000000.000 (inch/min)		0 to 2000000000 (×10-3inch/min)
	2	: degree	0 to 2000000.000 (degree/min)		0 to 2000000000	(×10-3degree/min)
	3	: pulse	0 to 1000000 (pulse/s)		0 to 1000000 (pulse/s)
		[Table 2]
	setting value		Value set with peripheral device (unit)		Value set with sequence program (unit)
Pr.1
	0	: mm	0.01 to 20000000.00 (mm/min)		1 to 2000000000	(×10-2mm/min)
	1	: inch	0.001 to 2000000.000 (inch/min)		1 to 2000000000	(×10-3inch/min)
	2	: degree	0.001 to 2000000.000 (degree/min)		1 to 2000000000	(×10-3degree/min)
			[Select type	1 is QD75P]
	3	: pulse	1 to 200000 (pulse/s)		1 to 1000000 (pulse/s) 2
			[Select type	1 is QD75D]
			1 to 1000000 (pulse/s)

1: For Select type, refer to GX Configurator-QP Operating Manual.

2: When using the QD75P (open collector output type), set the value to within "1 to 200000 (pulse/s)".

Pr.8

Speed limit value

Set the maximum speed during positioning and OPR operations.

The maximum speed during positioning control has to be limited in consideration of the drive unit and control target specifications.

Take account of the following when determining the speed limit value:

1)Motor speed

2)Workpiece movement speed

Pr.9

Acceleration time 0,

Pr.10

Deceleration time 0

"Pr.9 Acceleration time 0" specifies the time for the speed to increase from zero to the speed limit value ( Pr.8 ).

"Pr.10 Deceleration time 0" specifies the time for the speed to decrease from the speed limit value ( Pr.8 ) to zero.

Speed Pr.8 Speed limit value

			Positioning speed
			Time
	Actual		Actual deceleration time
	acceleration
Pr.9	time	Pr.10 Deceleration time 0
Acceleration time 0

1)If the positioning speed is set lower than the parameter-defined speed limit value, the actual acceleration/deceleration time will be relatively short. Thus, set the maximum positioning speed equal to or only a little lower than the parameter-defined speed limit value.

2)These settings are valid for OPR, positioning and JOG operations.

3)When the positioning involves interpolation, the acceleration/deceleration time defined for the reference axis is valid.

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