Mitsubishi Electronics QD75D, QD75P user manual Using, Cd.40, Moved from 315 to Moved from 45 to

9 MAJOR POSITIONING CONTROL

MELSEC-Q

[3]Positioning control method when the control unit is set to "degree"

1)Absolute system

(a)When the software stroke limit is invalid

Positioning is carried out in the nearest direction to the designated address, using the current value as a reference.

(This is called "shortcut control".)

Example

1) Positioning is carried out in a clockwise direction when the current value is moved from 315° to 45°.

2) Positioning is carried out in a counterclockwise direction when the current value is moved from 45° to 315°.

Moved from 315° to 45°		Moved from 45° to 315°
315°	45°	315°	45°

Using the "

Cd.40

ABS direction in degrees", the shortcut control can be invalidated

to carry out positioning in the designated direction.

This function can be performed when the software stroke limit is invalid.

When the software stroke limit is valid, an error "ABS direction in degrees illegal" (error code: 546) occurs and positioning is not started.

To designate the movement direction for the ABS control, write 1 or 2 to the " Cd.40

ABS direction in degrees" of the buffer memory. (The initial value is 0).

The value written to the " Cd.40 ABS direction in degrees" becomes valid only when

the positioning control is started.

In the continuous positioning control or continuous path control, the operation is continued with the setting made at a start if the setting is changed during the operation.

Name

Function

Buffer memory address

Axis 1 Axis 2 Axis 3 Axis 4

Initial value

Cd.40

ABS direction in degrees

The ABS movement direction in the unit of degree is designated.

0:Shortcut (direction setting invalid)

1:ABS clockwise

2:ABS counterclockwise

1550

1650

1750

1850

0

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