Mitsubishi Electric MELSEC-L LD75D, User Manual

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(b) Restrictions
2-axis circular interpolation control cannot be set in the following cases.
• When "degree" is set in "[Pr.1] Unit setting"
• When the units set in "[Pr.1] Unit setting" are different for the reference axis and interpolation axis. ("mm"
and "inch" combinations are possible.)
• When "reference axis speed" is set in "[Pr.20] Interpolation speed designation method"
An error will occur and the positioning will not start in the following cases. The machine will immediately stop if
the error is detected during positioning control.
• When the radius exceeds "536870912 (=2
29
)". (The maximum radius for which circular interpolation
control is possible is "536870912 (=2
29
)"

An error "Outside radius range" (error code: 544) will occur at
positioning start.
• When the start point address is the same as the center point address

The error "Center point setting
error" (error code: 527) will occur.
• When the end point address is the same as the center point address

The error "Center point setting
error" (error code: 527) will occur.
• When the center point address is outside the range of -2147483648(-2
31
) to 2147483647(2
31
-1): The error
"Center point setting error" (error code: 527) will occur.
(c) Positioning data setting example (Reference axis and interpolation axis are
designated as axis 1 and axis 2, respectively.)
The following table shows setting examples when "2-axis circular interpolation control with center point
designation (ABS circular right, ABS circular left)" is set in positioning data No. 1 of axis 1. (The required values
are also set in positioning data No. 1 of axis 2.)
Refer to

Page 152, Section 5.3 for information on the setting details.
Setting item
Axis 1 (reference
axis) setting
example
Axis 2
(interpolation axis)
setting example
Setting details
Positioning
data No.1
[Da.1] Operation pattern
Positioning
complete

Set "Positioning complete" assuming that the next
positioning data will not be executed.
[Da.2] Control system
ABS circular
right/ABS circular
left

Set absolute system, 2-axis circular interpolation control
with center point designation. (Select clockwise or
counterclockwise according to the 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
Axis 2

Set the axis to be interpolated (partner axis). If the self-
axis is set, an error will occur.
[Da.6]
Positioning
address/movement
amount
8000.0

m 6000.0

m
Set the end point address. (Assuming "mm" is set in
"[Pr.1] Unit setting".)
[Da.7] Arc address 4000.0

m 3000.0

m
Set the arc address. (Assuming "mm" is set in "[Pr.1] Unit
setting".)
[Da.8] Command speed 6000.00mm/min

Set the speed during movement to the end point
address. (Designate the composite speed in "[Pr.20]
Interpolation speed designation method".)
[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.
[Da.10] M code 10

Set this when other sub operation commands are issued
in combination with the No. 1 positioning data.