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MELSEC-Q
9 MAJOR POSITIONING CONTROL
Restrictions
An error will occur and the positioning will not start in the following ca ses. The
machine will immediately stop if the error is detected during a p ositioning
operation.
• If the movement amount of each axis exceeds "1073741824 (=230)" when "0:
Composite speed" is set in " Pr.20 Interpolation speed designation method"
... The "Outside linear movement amount range error (error code: 504)" oc curs
at a positioning start.
(The maximum movement amount that can be set in " Da.6 Positioning
address/movement amount" is "1073741824 ( =230)".)
Positioning data setting example
[Reference axis and interpolation axis are designated as axis 1 an d axis 2,
respectively.]
The following table shows setting examples when "2-axis linear int erpolation
control (INC linear 2)" is set in positioning data No. 1 of axis 1. (T he required
values are also set in positioning data No. 1 of axis 2.)
Axis
Setting item
Axis 1
(reference
axis) setting
example
Axis 2
(interpolation
axis) 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 2 – Set incremental system 2-axis linear interpolation 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 1–Set the axis to be interpolated (partner axis).
If the self-axis is set, an error will occur.
Da.6 Positioning address/
movement amount 9000.0 µm -3000.0 µmSet 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 6000.00
mm/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.
Axis 1 Positioning data No. 1
Da.10M 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.
POINT
•When the "reference axis speed" is set dur ing 2-axis linear intrpolation control, set
so the major axis side becomes the reference axis. If the minor axis side is set as
the reference axis, the major axis side speed may exceed the " Pr.8 Speed limit
value".