93
In this case the positioning action of address 124 is processed normally since
it is an end point; furthermore, address 123 remains enabled as an intermedi-
ate point. The entire operation proceeds normally.
P
2
P
1
P
3
P
0
Starting point
10
01
10
01
In this case a circular arc cannot be created with the designated positions,
and a circular arc data error occurs. Remember, two consecutive positioning
actions must comprise circular arc positioning. The first address must store
the circular arc center (interpolation code 11) or circular arc intermediate
point (interpolation code 10), and the second address must store the interpo-
lation end point (interpolation code 01).
Straight-Line Interpolation
The following table presents a hypothetical list of positioning actions all with
interpolation code 01 (as end points). The accompanying figure shows two
interpolation routes. The solid line from the starting point to P
1
and then to P
3
obeys data in the table, because addresses 200 and 202 are disabled. If all
addresses 200-203 were all enabled, positioning would follow the broken line
in the figure.
Address
Position
Interpolation Code
Positioning Action enabled
200
P
0
X
01
Enabled
201
P
1
X
01
Disabled
202
P
2
X
01
Enabled
203
P
3
X
01
Disabled
Completion code
Address
Position
1
600
P
0
X
1
601
P
1
X
1
602
P
2
X
0
603
P
3
X
Starting point
P
2
P
1
P
3
P
0
Operation according to data in table
Operation when all positioning actions
in table (200-203) are enabled)
ISRT with Address 124
Disabled
ISRT with Improper
Interpolation Codes
Interpolation
Section 6-4
