9MAJOR POSITIONING CONTROL

[3]Continuous path control

(1)Continuous path control

MELSEC-Q

(a)The speed is changed without deceleration stop between the command speed of the positioning data currently being run and the speed of the positioning data that will be run next.

The speed is not changed if the current speed and the next speed are equal.

(b)The speed will become the speed used in the previous positioning operation if the command speed is set to "-1".

(c)Dwell time will be ignored, even if set.

(d)The next positioning No. is executed automatically in operations by continuous path control (operation pattern "11"). Always complete the positioning by setting operation pattern "00" in the last positioning data. If the operation pattern is set to positioning continue ("01" or "11"), the operation will continue until operation pattern "00" is found.

If the operation pattern "00" cannot be found, the operation may be carried out until the positioning data No. 600. If the operation pattern of the positioning data No. 600 is not completed, the operation will be started again from the positioning data No. 1.

(e)The speed switching patterns include the "front-loading speed switching pattern" in which the speed is changed at the end of the current positioning side, and the "standard speed switching pattern" in which the speed is at the start of the next positioning side. (Refer to

"Pr.19

Speed switching mode".)

Continuous path control

Standard speed switching mode

Front-loading speed switching mode

(f)In the continuous path control, the positioning may be completed before the set address/movement amount and the current data may be switched to the "positioning data that will be run next".

This is because a preference is given to the positioning at a command speed. In actuality, the positioning is completed before the set address/movement amount by an amount of remaining distance at speeds less than the command speed. The remaining distance ( )

at speeds less than the command speed is 0 (distance moved in 1.8ms at a speed at the time of completion of the positioning).

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Mitsubishi Electronics QD75P, QD75D user manual Continuous path control, Pr.19