9MAJOR POSITIONING CONTROL

(b)When the software stroke limit is valid

MELSEC-Q

The positioning is carried out in a clockwise/counterclockwise direction depending on the software stroke limit range setting method. Because of this, positioning with "shortcut control" may not be possible.

Example

When the current value is moved from 0° to 315°, positioning is carried out in the clockwise direction if the software stroke limit lower limit value is 0° and the upper limit value is 345°.

345.00000° 0° 315.00000°

Positioning carried out in the clockwise direction.

POINT

Positioning addresses are within a range of 0° to 359.99999°.

Use the incremental system to carry out positioning of one rotation or more.

2) Incremental system

Positioning is carried out for a designated movement amount in a designated movement direction when in the incremental system of positioning.

The movement direction is determined by the sign (+, –) of the movement amount.

For a positive (+) movement direction......Clockwise

For a negative (–) movement direction.....Counterclockwise

POINT

Positioning of 360° or more can be carried out with the incremental system. At this time, set as shown below to invalidate the software stroke limit.

[Software stroke limit upper limit value = Software stroke limit lower limit value]

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Mitsubishi Electronics QD75P, QD75D user manual When the software stroke limit is valid, Incremental system