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3. POSITIONING SIGNALS
[Input of positioning data to the PCPU]
SCPU
Data updating in accordance
with sequence program
Updated data
Indirect device D
Updating
(A)
0
(B)
2
(C)
4
(D)
6
8
10
12
14
16
18
(10)
20
(11)
22
(12)
24
(13)
26
(14)
28
(15)
30
(16)
Point
(1)
(A)
Input
First
0
positioning
(2)
(B)
(3)
(C)
1
(4)
(D)
(5)
2
(6)
(7)
3
(8)
(9)
4
5
6
7
Second
positioning
The internal processing for the operation shown above is described overpage.
Positioning data input to the PCPU
at each point
Positioning execution point
Point 0
5
4
3
6
(13)
(11)
(9)
(7)
(14)
(12)
(10)
(8)
1
6
5
4
(15)
(13)
(11)
(9)
(16)
(14)
(12)
(10)
2
0
7
6
5
(A)
(15)
(13)
(11)
(B)
(16)
(14)
(12)
3
1
0
7
6
(C)
(A)
(15)
(13)
(D)
(B)
(16)
(14)
4
2
1
0
7
(5)
(C)
(A)
(15)
(6)
(D)
(B)
(16)
5
3
2
1
0
(7)
(5)
(C)
(A)
(8)
(6)
(D)
(B)
6
4
3
2
1
(9)
(7)
(5)
(C)
(10)
(8)
(6)
(D)
7
5
4
3
2
(11)
(9)
(7)
(5)
(12)
(10)
(8)
(6)
Point 0
6
5
4
3
(13)
(11)
(9)
(7)
(14)
(12)
(10)
(8)
3 − 39
PCPU
Data set pointer for
constant-speed control
2
1
0
! Indicates the last
positioning data input
(5)
(3)
(1)
to the PCPU.
(6)
(4)
(2)
! Each time the
positioning at a point
is completed, the
3
2
1
value increases by
one.
(7)
(5)
(3)
(8)
(6)
(4)
4
3
2
(9)
(7)
(5)
(10)
(8)
(6)
5
4
3
(11)
(9)
(7)
(12)
(10)
(8)
PLC set pointer
! Indicates the last
6
5
4
positioning data
updated by the
(13)
(11)
(9)
sequence program
(14)
(12)
(10)
last time.
! The user controls
this pointer in the
7
6
5
sequence program.
(15)
(13)
(11)
(16)
(14)
(12)
0
7
6
(A)
(15)
(13)
(B)
(16)
(14)
1
0
7
(C)
(A)
(15)
(D)
(B)
(16)
2
1
0
(5)
(C)
(A)
(6)
(D)
(B)
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