Mitsubishi Electric MELSEC-Q Series User Manual page 423

Starting the interpolation control
The positioning data Nos. of the reference axis (axis in which interpolation control
was set in "[Da.2] Control method") are started when starting the interpolation
control. (Starting of the interpolation axis is not required.)
The following errors or warnings will occur and the positioning will not start if both
reference axis and the interpolation axis are started.
 Reference axis : Interpolation while interpolation axis BUSY (error code:

Interpolation axis : Control method setting error (error code: 524), start during
Interpolation control continuous positioning
When carrying out interpolation control in which "continuous positioning control"
and "continuous path control" are designated in the operation pattern, the
positioning method for all positioning data from the started positioning data to the
positioning data in which "positioning complete" is set must be set to interpolation
control.
The number of the interpolation axes and axes to be interpolated cannot be
changed from the intermediate positioning data. When the number of the
interpolation axes and axes to be interpolated are changed, the error "Control
method setting error" (error code: 524) will occur and the positioning will stop.
Speed during interpolation control
Either the "composite speed" or "reference axis speed" can be designated as the
speed during interpolation control.
([Pr.20] Interpolation speed designation method)
Only the "Reference axis speed" can be designated in the following interpolation
control.
When a "composite speed" is set and positioning is started, the error "Interpolation
mode error" (error code: 523) occurs, and the system will not start.
• 4-axis linear interpolation
• 2-axis speed control
• 3-axis speed control
• 4-axis speed control
Cautions in interpolation control
(1) If any axis exceeds "[Pr.8] Speed limit value" in the 2- to 4-axes speed control,
the axis exceeding the speed limit value is controlled with the speed limit value.
The speeds of the other axes being interpolated are suppressed by the
command speed ratio.
(2) If the reference axis exceeds "[Pr.8] Speed limit value" during 2-axis circular
interpolation control, the reference axis is controlled at the speed limit value.
(The speed limit does not function on the interpolation axis side.)
(3) If any axis exceeds "[Pr.8] Speed limit value" during 2- to 4-axis linear
interpolation control or 2- to 4-axis fixed-feed control, the axis exceeding the
speed limit value is controlled with the speed limit value. The speeds of the
other axes being interpolated are suppressed by the movement amount ratio.
(4) In 2- to 4-axis interpolation, you cannot change the combination of interpolated
axes midway through operation.
519)
operation (warning code: 100).
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Chapter 9 Major Positioning Control