Mitsubishi Electronics QD75D, QD75P Functions to limit the control, Speed limit function

12CONTROL SUB FUNCTIONS

12.4 Functions to limit the control

MELSEC-Q

Functions to limit the control include the "speed limit function", "torque limit function", "software stroke limit", and "hardware stroke limit". Each function is executed by parameter setting or sequence program creation and writing.

12.4.1 Speed limit function

The speed limit function limits the command speed to a value within the "speed limit value" setting range when the command speed during control exceeds the "speed limit value".

The details shown below explain about the "speed limit function".

[1]Relation between the speed limit function and various controls

[2]Precautions during control

[3]Setting the speed limit function

[1]Relation between the speed limit function and various controls

The following table shows the relation of the "speed limit function" and various controls.

	Control type		Speed limit function		Speed limit value
OPR	Machine OPR control
control	Fast OPR control
		1-axis linear control
		2 to 4-axes linear
	Position	interpolation control
		1-axis fixed-feed control				Speed limit
	control	2 to 4-axes fixed-feed			Pr.8
							value
		control (interpolation)
Major		2-axis circular interpolation
positioning		control
control	1 to 4-axes Speed control
	Speed-position switching control,
	Position-speed switching control
		Current value changing	–
	Other	JUMP instruction, NOP		Setting value invalid
	control	instruction, LOOP to	–
		LEND
							JOG speed
Manual	JOG operation, Inching operation				Pr.31
							limit value
control
	Manual pulse generator operation			Setting is invalid

: Always set

–: Setting not required (Setting value is invalid. Use the initial values or setting values within a range where no error occurs.)

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