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MELSEC-Q
9   MAJOR POSITIONING CONTROL 
 
[1]   2-axis circular interpolation control with center point designation 
(ABS circular right, ABS circular left) 
 
 Operation chart 
 
In the absolute system, 2-axis circular interpolation control with center point 
designation, positioning is carried out from the current stop position (start point 
address) to the address (end point address) set in "
Da.6
 Positioning 
address/movement amount" in an arc path having as its center the address (arc 
address) of the center point set in "
Da.7
 Arc address". 
 
Radius 
Movement by circular interpolation 
Forward direction 
Reverse direction 
End point address
Start point address
(current stop position) 
Arc address 
Forward direction Reverse direction 
(positioning address)
 
 
Positioning of a complete round with a radius from the start point address to the 
arc center point can be carried out by setting the end point address (positioning 
address) to the same address as the start point address. 
 
Arc center point
Reverese direction
Forward direction
(Arc address)
(current stop position)
Start point address
=
Reverese direction
Forward direction
End point address
(positioning address)