MITSUBISHI ELECTRIC Mitsubishi Programmable Logic Controller QD75D - Manual (Page 328)

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MELSEC-Q
9 MAJOR POSITIONING CONTROL
[2] 1-axis linear control (INC linear 1)
Operation chart
In incremental system 1-axis linear control, addresses established by a machine
OPR are used. Positioning is carried out from the current stop position (start point
address) to a position at the end of the movement amount set in " Da.6
Positioning address/movement amount". The movement direction is determined by
the sign of the movement amount.
Reverese direction Forward direction
Start point address
(current stop position)
Movement direction for
a negative movement amount
Movement direction for
a positive movement amount
-3000 -2000 5000
Positioning control in the reverse direction (movement amount -7000)
Address after positioning control Start point address
(current stop position)
-1000 0 1000 2000 3000 4000 6000
Example
When the start point address is 5000, and the movement amount is -7000, positioning is carried out to
the -2000 position.
Positioning data setting example
The following table shows setting examples when "1-axis linear control (INC linear
1)" is set in positioning data No. 1 of axis 1.
Setting item Setting example Setting details
Da.1 Operation pattern
Positioning
complete
Set "Positioning complete" assuming the next positioning data will not
be executed.
Da.2 Control system INC linear 1 Set incremental system 1-axis linear control.
Da.3
Acceleration time
No.
1
Designate the value set in " Pr.25 Acceleration time 1" as the
acceleration time at start.
Da.4
Deceleration time
No.
0
Designate the value set in " Pr.10 Deceleration time 0" as the
deceleration time at deceleration.
Da.5
Axis to be
interpolated
– Setting not required (setting value will be ignored).
Da.6
Positioning address/
movement amount
- 7 0 0 0 . 0
µ
m
Set the movement amount. (Assuming "mm" is set in " Pr.1 Unit
setting".)
Da.7 Arc address – Setting not required (setting value will be ignored).
Da.8 Command speed 6000.00mm/min Set the speed during movement.
Da.9 Dwell time 500ms
Set the time the machine dwells after the positioning stop (pulse output
stop) to the output of the positioning complete signal.
A
x
is 1 Positioning data N
o
. 1
Da.10 M code 10
Set this when other sub operation commands are issued in combination
with the No. 1 positioning data.
Refer to Section 5.3 "List of positioning data" for information on the setting details.