Mitsubishi Electronics QD75P Setting the override function, Positioning Cd.13 Operation speed

12CONTROL SUB FUNCTIONS

[2]Precaution during control

MELSEC-Q

(1)When changing the speed during continuous path control, the speed change will be ignored if there is not enough distance remaining to carry out the change.

(2)A warning "Deceleration/stop speed change (warning code: 500)" occurs and the speed cannot be changed in the following cases.

(The value set in " Cd.13 Positioning operation speed override" is validated after a deceleration stop.)

•During deceleration by a stop command

•During automatic deceleration during positioning control

(3)When the speed is changed during interpolation control, the required speed is set in the reference axis.

(4)When deceleration is started by the override function, the deceleration start flag does not turn ON.

[3]Setting the override function

The following shows the data settings and sequence program example for setting the override value of axis 1 to "200%".

(1)Set the following data. (Use the start time chart shown in section (2) below as a reference, and set using the sequence program shown in section (3).)

			Setting		Buffer memory address
	Setting item			Setting details	Axis	Axis	Axis	Axis
			value
					1	2	3	4
		Positioning
Cd.13		operation speed	200	Set the new speed as a percentage (%).	1513	1613	1713	1813
		override

Refer to Section 5.7 "List of control data" for details on the setting details.

(2)The following shows a time chart for changing the speed using the override function.

V

Dwell time

t

Positioning start signal	[Y10]
PLC READY signal	[Y0]
QD75 READY signal	[X0]
Start complete signal	[X10]
BUSY signal	[XC]
Positioning complete signal	[X14]
Error detection signal	[X8]
Cd. 13 Positioning operation		200
	speed override

Fig. 12.29 Time chart for changing the speed using the override function

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