Omron 3G3JX User Manual page 170

4-2 Function Mode
Query
No. Field name
1 Slave address*1
2 Function code
Register start address
3
*3
Register start address
4
*3
Number of holding
5
4 registers (MSB)
Number of holding
6
registers (LSB)
7 CRC-16 (MSB)
8 CRC-16 (LSB)
*1. Broadcasting cannot be performed.
*2. Data is transferred by the number of data bytes. In this example, 12 ("0Ch") bytes are used since 6 pieces of
holding register data are returned.
*3. Note that the holding register start address is "0011h", which is smaller by 1 than the register number "0012h".
Read the data received in the response, as follows:
Holding register start
Holding register start
4-85
Example
(Hex)
01
03
00
(MSB)
11
(LSB)
00
06
95
CD
Response buffer
12+0
number (MSB)
Response data
Trip data Trip factor (E03)
Response buffer
12+3
number (MSB)
Response data 00h
Trip data
Response
No.
1
2
3 Number of data bytes
4 Register data 1 (MSB)
5 Register data 1 (LSB)
6 Register data 2 (MSB)
7 Register data 2 (LSB)
8 Register data 3 (MSB)
9 Register data 3 (LSB)
10 Register data 4 (MSB)
11 Register data 4 (LSB)
12 Register data 5 (MSB)
13 Register data 5 (LSB)
14 Register data 6 (MSB)
15 Register data 6 (LSB)
16
17
4-5
12+0 12+1
(LSB) (MSB)
003h 00h
Not used
10-11 12-13
12+3 12+4
(LSB) (MSB)
00h 001Eh
Not used Output current (3.0 A)
Example
Field name
(Hex)
Slave address
Function code
*2
0C
1E
1C
CRC-16 (MSB) AF
CRC-16 (LSB) 6D
6-7 8-9
12+1 12+2
(LSB) (MSB)
00h 0063h
Frequency (9.9 Hz)
14-15
12+4 12+5
(LSB) (MSB)
001Ch
DC bus V DC (284V)
01
03
00
03
00
00
00
63
00
00
00
01
12+2
(LSB)
12+5
(LSB)