Reading The Holding Register Content - Omron JX User Manual

Refer to "<Exception Response>" (4-75) if the coil status reading command has not been performed
normally.
<Reading the Holding Register Content [03h]>
Reads the specified number of consecutive holding register contents from the specified holding
register addresses.
(Example)
•Reads the latest trip information (frequency, current, voltage at trip) from the Inverter with the slave
address "1".
•Refer to the trip status as follows:
JX command D081 (Factor)
Register No.
Trip status Overcurrent (E03)
Query
No. Field name
1 Slave address*1
2 Function code
Register start address
3
*3
(MSB)
Register start address
4
*3
(LSB)
Number of holding
5
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".
D081 (Frequency)
0012h 0014h
9.9 Hz
Example
(Hex)
01
03
00
11
00
06
95
CD
4-2 Function Mode
D081
(Output current)
0016h
3.0 A
Response
No. Field name
1 Slave address
2 Function code
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 CRC-16 (MSB)
17 CRC-16 (LSB)
D081
(DC bus V DC)
0017h
284 V
Example
(Hex)
01
03
*2
0C
00
03
00
00
00
63
00
00
00
1E
01
1C
AF
6D
4-71
4