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3. POSITIONING SIGNALS
[Input of positioning data to the PCPU]
Data updating in accordance
with sequence program
Updated data
Updating
(A)
(B)
(C)
(D)
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SCPU
Indirect device D
Point
0
(1)
(A)
Input
First
0
positioning
2
(2)
(B)
4
(3)
(C)
1
6
(4)
(D)
8
(5)
2
10
(6)
12
(7)
3
14
(8)
16
(9)
4
18
(10)
20
(11)
5
22
(12)
24
(13)
6
26
(14)
28
(15)
7
30
(16)
Second
positioning
The internal processing for the operation shown above is described overpage.
search engine
Positioning data input to the PCPU
at each point
Positioning execution point
Point 0
6
5
4
3
2
(13)
(11)
(9)
(7)
(5)
(14)
(12)
(10)
(8)
(6)
1
6
5
4
3
(15)
(13)
(11)
(9)
(7)
(16)
(14)
(12)
(10)
(8)
2
0
7
6
5
4
(A)
(15)
(13)
(11)
(9)
(B)
(16)
(14)
(12)
(10)
3
1
0
7
6
5
(C)
(A)
(15)
(13)
(11)
(D)
(B)
(16)
(14)
(12)
4
2
1
0
7
6
(5)
(C)
(A)
(15)
(13)
(6)
(D)
(B)
(16)
(14)
5
3
2
1
0
7
(7)
(5)
(C)
(A)
(15)
(8)
(6)
(D)
(B)
(16)
6
4
3
2
1
0
(9)
(7)
(5)
(C)
(A)
(10)
(8)
(6)
(D)
(B)
7
5
4
3
2
1
(11)
(9)
(7)
(5)
(C)
(12)
(10)
(8)
(6)
(D)
Point 0
6
5
4
3
2
(13)
(11)
(9)
(7)
(5)
(14)
(12)
(10)
(8)
(6)
3 − 34
PCPU
Data set pointer for
constant speed control
1
0
! Indicates the last
positioning data input
(3)
(1)
to the PCPU.
(4)
(2)
! Each time the
positioning at a point
is completed, the
2
1
value increases by
one.
(5)
(3)
(6)
(4)
3
2
(7)
(5)
(8)
(6)
4
3
(9)
(7)
(10)
(8)
PLC set pointer
! Indicates the last
5
4
positioning data
updated by the
(11)
(9)
sequence program
(12)
(10)
last time.
! The user controls
this pointer in the
6
5
sequence program.
(13)
(11)
(14)
(12)
7
6
(15)
(13)
(16)
(14)
0
7
(A)
(15)
(B)
(16)
1
0
(C)
(A)
(D)
(B)
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