Omron SYSMAC CJ1W-SCU21-V1, Руководство по эксплуатации

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Auxiliary Area and CIO Area Allocations (Modbus-RTU Slave Mode) Section 9-3
Note The subscript numbers in the shaded boxes indicate the ON/OFF (1/0) status
of the bits that are read.
Read Holding Registers
Function
Reads multiple words from the DM or EM Area of I/O memory.
Command
Note The address depends on the area that is allocated.
Response
Note N = Quantity of Registers
Reading 3 Words from
D1000 to D1002
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
Length Data
Function Code 1 byte 03 hex
Starting Address 2 bytes 0 to 7FFF hex (See note.)
Quantity of Registers 2 bytes 1 to 7D hex
Length Data
Function Code 1 byte 03 hex
Byte Count 1 byte N
×
2 (See note.)
Register Value N
×
2 bytes
Request Response
Data Data
Function Code 03 hex Function Code 03 hex
Starting Address (H) 03 hex Byte Count 06 hex
Starting Address (L) E8 hex Register Value (H) DM1000 AB hex
Quantity of Registers (H) 00 hex Register Value (L) DM1000 12 hex
Quantity of Registers (L) 03 hex Register Value (H) DM1001 56 hex
Register Value (L) DM1001 78 hex
Register Value (H) DM1002 97 hex
Register Value (L) DM1002 13 hex
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
D1000 A B 1 2
D1001 5 6 7 8
D1002 9 7 1 3