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MANUEL STA46
1-4-1
I/O memory area (CIO) Read Multiple Coils
[Function]
Reads coils in I/O memory area
[Request]
Function Code
Starting Address
Quantity of Coils
[Response]
Function Code
Byte Count
Coil Status
Example: read 19 bits (CIO 0001.04 to 0002.06)
Request
Function Code
Starting Address(H)
Starting Address(L)
Quantity of Coils(H)
Quantity of Coils(L)
15
14
13
0CH 15
14
13
1CH 31
30
29
1
0
2CH 47
46
45
3CH 63
62
61
Italic characters show the ON/OFF(1/0) status of its bit condition.
JP Viskovic 30/08/2005 OEE-F
Length
1 Byte
2 Bytes
2 Bytes
Length
1 Byte
1 Byte
n Byte
Data
0x02
Function Code
0x00
Byte Count
0x13
Coil Status 27-20
0x00
Coil Status 35-28
0x13
Coil Status 38-36
12
11
10
9
12
11
10
9
28
27
26
25
1
1
1
1
44
43
42
41
60
59
58
57
Data
0x02
0x0000-0x13FF
1-2000(0x7D0)
Data
0x02
N
n = N or N+1
Response
Data
0x02
0x03
0xCD
0x6B
0x05
8
7
6
5
8
7
6
5
24
23
22
21
0
0
1
1
40
39
38
37
1
56
55
54
53
Modbus TCP
4
3
2
1
4
3
2
1
20
19
18
17
0
1
36
35
34
33
0
1
0
1
52
51
50
49
7
0
0
16
32
1
0
48
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