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2 CompoWay/F Communications Procedures
E5@D Digital Temperature Controllers Communications Manual (H225)
2-3 De
tailed
Descrip
tion
of
the
Ser
v
ices
2
2-
3-3 C
omposite R
ead from Var
ia
ble Ar
ea
This service reads in order the contents of specified addresses in the variable area.
•
Service Request PDU
•
Service Response PDU
Note: The read data is read together with the variable type in the order specified by the command.
(1) Variable Type and Read Start Address
For details on variable types and read start addresses, refer to
Section 3 Communications Data for
CompoWay/F
.
(2) Bit Position
Bit access is not supported. Fixed to “00.”
(3) Number of Read Data Items (Variable Type + Read Data + Bit Position Counted As 1 Item)
Note: The following table gives the maximum number of read data items when double-word data and word data
are used together.
2-3-3
Composite Read from Variable Area
Read data length
Number of read data items
For double word (variable type C1 or C3)
20 max.
For word (variable type 81 or 83)
25 max.
Composite Read
Composite Read
Double word
For variable type C1
or C3
Word
For variable type 81
or 83
Double word
For variable type C1
or C3
Word
For variable type 81
or 83
20
0
11
14
19
1
10
15
18
2
9
16
18
3
8
17
17
4
7
18
17
5
6
19
16
6
8
20
15
7
4
21
15
8
3
22
14
9
2
23
14
10
1
24
13
11
0
25
12
12
12
13
MRC SRC
0 1 0 4
0 0
2
2
2
2
4
0 0
2
2
4
Variable
type
Read
address
Bit
position
Variable
type
Read
address
Bit
position
2
2
MRC SRC
0 1 0 4
4
2
2
Variable
type
Response
code
Variable
type
Read data
Number of elements
×
8 or 4
Read data
Number of elements
×
8 or 4
Содержание E5 D Series
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Страница 20: ...18 E5 D Digital Temperature Controllers Communications Manual H225 ...
Страница 28: ...1 Communications Methods 1 8 E5 D Digital Temperature Controllers Communications Manual H225 ...
Страница 108: ...5 Communications Data for Modbus 5 18 E5 D Digital Temperature Controllers Communications Manual H225 ...
Страница 200: ...6 Programless Communications 6 92 E5 D Digital Temperature Controllers Communications Manual H225 ...
Страница 205: ...I 1 E5 D Digital Temperature Controllers Communications Manual H225 I Index ...
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