Mitsubishi Electronics QD75P, QD75D user manual Order of priority for stop process

6SEQUENCE PROGRAM USED FOR POSITIONING CONTROL

[3]Order of priority for stop process

MELSEC-Q

The order of priority for the QD75 stop process is as follows.

Deceleration stop < Sudden stop < Immediate stop

(1)If the deceleration stop command ON (stop signal ON) or deceleration stop cause occurs during deceleration to speed 0 (including automatic deceleration), operation changes depending on the setting of " Cd.42 Stop command processing for deceleration stop selection".

(a)Manual control

Independently of the Cd.42 setting, a deceleration curve is re-processed from the speed at stop cause occurrence.

(b)OPR control, positioning control

•When Cd.42 = 0 (deceleration curve re-processing):

A deceleration curve is re-processed from the speed at stop cause occurrence.

•When Cd.42 = 1 (deceleration curve continuation):

The current deceleration curve is continued after stop cause occurrence. (For details, refer to "Section 12.7.10 Stop command processing for deceleration stop function".)

(2)If the stop signal ON or stop cause specified for a sudden stop occurs during deceleration, sudden stop process will start at that point.

However, if the sudden stop deceleration time is longer than the deceleration time, the deceleration stop process will be continued even if a sudden stop cause occurs during the deceleration stop process.

Example

The process when a sudden stop cause occurs during deceleration stop is shown below.

Positioning speed	Deceleration	Positioning speed	Deceleration
	stop process		stop process
	Sudden		Sudden
	stop cause		stop cause

Stop Stop

Sudden stop deceleration process Deceleration stop process continues Process for sudden stop

(3)Operation will stop immediately if the target reaches the positioning address specified in the currently executed positioning data during deceleration of position control.

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