Omron CJ1W-SCU22, Руководство по эксплуатации, Страница: 264 / 478

7 Using Modbus-RTU Slave Mode
7-14
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
z
Function
Reads multiple bits from the CIO, Work, Holding, or Auxiliary Area of the memory used for CJ-series
Unit.
z
Command
* The address depends on the area that is allocated.
z
Response
* N=Quantity of Registers
z
Reading 19 Bits from CIO 0001.04 to CIO 0002.06
Note Unused bits are filled with zeros.
Note The subscript numbers in the shaded boxes indicate the TRUE/FALSE (1/0) status of the bits
that are read.
7-3-2 Command and Response Details
Read Coils
Length Data
Function Code 1 byte 01 hex
Starting Address 2 bytes 0000 to FFFF hex (*)
Quantity of Coils 2 bytes 0001 to 03E8 hex (1 to 1000)
Length Data
Function Code 1 byte 01 hex
Byte Count 1 byte N (*)
Coil Status n byte n = N or N+1
Request Response
Data Data
Function Code 01 hex Function Code 01 hex
Starting Address (H) 00 hex Byte Count 03 hex
Starting Address (L) 14 hex Coil Status 27 to 20 CD hex
Quantity of Coils (H) 00 hex Coil Status 35 to 28 6B hex
Quantity of Coils (L) 13 hex Coil Status 38 to 36 05 hex
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
CIO 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
CIO 1 31
1
30
0
29
1
28
1
27
1
26
1
25
0
24
0
23
1
22
1
21
0
20
1
19 18 17 16
CIO 2 47 46 45 44 43 42 41 40 39 38
1
37
0
36
1
35
0
34
1
33
1
32
0
CIO 3 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48