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4-1
Section
Overview
43
n = CIO 2000 + (unit number
×
10) in the CPU Unit
m = (unit number
×
100) in the CPU Unit
Method
Customizable
Counter Unit
words
CPU Unit
words
Special-
ized or
general-
purpose
From CPU
Unit to
Customizable
Counter Unit
From
Customizable
Counter Unit
to CPU Unit
Timing of
transfer
Specification
method
1.
Data
exchanged
SR Area
(SR 230 to
SR 239)
Allocated
CIO Area
words
Specialized 1 word (n)
1 word (n+5)
At I/O
refresh
(See
Fixed
exch nged
using
allocated
CIO Area
words
R 239)
words
(n to n+9)
General-
purpose
4 words
(n+1 to n+4)
4 words
(n+6 to n+9)
( ee
note.)
2.
Data
exchanged
using
allocated
DM Area
words
User-set
words (in the
DM, EM, CIO,
LR, or AR
Area)
Allocated
DM Area
words
(m to m+99)
Specialized
(Initial
Setting
Area)
10 words
(m to m+9)
None
At startup
or Unit
restart
The user-set
words in the
Customizable
Counter Unit
are specified
in allocated
DM Area
words (m+1
to m+5).
General-
purpose
90 words total
(m+10 to m+99)
At I/O
refresh
(See
note.)
---
3.
Data
exchanged
using LR
Area words
LR Area
User-set
words (in
the CIO,
WR, AR,
HR, DM, or
EM Areas)
General-
purpose
32 words total
At I/O
refresh
(See
note.)
The user-set
words in the
CPU Unit are
specified in
the Unit
Setup Area in
the
Customizable
Counter Unit.
Note Data is exchanged during the I/O refresh period of the CPU Unit.
4-1-2 Data Exchange Using the Words Allocated in CIO Area
Data is exchanged cyclically (i.e., at I/O refresh) between the CPU Unit’s words
allocated in CIO Area (n to n+9) and Customizable Counter Unit’s SR Area
words SR 230 to SR 239. This data exchange consists of two types of data.
1, 2, 3...
1. CIO Area words allocated to special functions (n, n+5): These words are
used for commands from the CPU Unit and status notification from the Cus-
tomizable Counter Unit.
2. CIO Area words for general-purpose data (n+1 to n+4, n+6 to n+9)
Содержание CS1 -
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Страница 3: ...CS1W HIO01 HCP22 HCA22 Customizable Counter Units Operation Manual Produced January 2001...
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