Mitsubishi QD75P1N - Page 337

9 - 21
MELSEC-Q
9 MAJOR POSITIONING CONTROL
(b) When the software stroke limit is valid
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
0°
345.00000°
315.00000°
Positioning carried out in the clockwise direction.
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°.
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.
(Set the value with in the setting range (0
°
to 359.99999
°
).)
[Software stroke limit upper limit value = Software stroke limit lower limit value]