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7 MOTION PROGRAMS FOR POSITIONING CONTROL
7.11.6 Control units for interpolation control
(1) The interpolation control units specified with the parameter block and the control
units of the fixed parameter are checked.
If the interpolation control units specified with the parameter block differ from the
control units of the each axis fixed parameter for the interpolation control, it shown
below.
Interpolation control units in the parameter block
mm inch degree
Starting method
Condition for
normal start
There are axes whose control unit set in
the fixed parameter is [mm] /[inch].
There are axes whose
control unit set in the
fixed parameter is
[degree].
Control starts by the
interpolation control unit of
parameter block.
Condition for unit
mismatch error
(error code : 40)
Control units of the fixed parameter for all axes differ from the
interpolation control units specified with parameter block.
• If the control units of axes to be
interpolation-controlled are the
same, control starts in the
preset control unit.
• If the control units of axes to be
interpolation-controlled are
different, control starts in the
unit of highest priority as
indicated below.
Priority degree>inch>mm
(2) The combinations of each axis control units for interpolation control are shown in
the table below.
mm inch degree
mm 1) 2) 2)
inch 2) 1) 2)
degree 2) 2) 1)
1) : Same unit 2) : Unit mismatch
(a) Same unit ( 1) )
The position command value is calculated according to the setting
address/travel value, positioning speed and electronic gear.
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