Reading The Holding Register Content [03H] - Omron SYSDRIVE MX2 SERIES User Manual

6-5 Explanation of Each Parameter No.
The data received as the response shows the statuses of coils 0007h to 000Dh. The received
data "45h = 0100 0101b" is read as shown in the preceding page, where the status of coil
0007h represents the LSB.
If the reading coil exceeds the defined coil range in the final coil data, such coil data is regarded
as "0" and returned.
Refer to "Exceptional Response" on page 6-18 if the coil status read command was
unsuccessful.
Example) If the statuses of 16 coils are read from Coil No. 0001h, the data sequence will be
as follows:
Data 1
Data 2

Reading the Holding Register Content [03h]

Reads the specified number of consecutive holding register contents from the specified
holding register addresses.
Example) Read the latest trip information (0012h to 0017h) from the Inverter whose
slave address is "1".
Query:
6
No.
1
2
3
4
5
6
7
8
6-9
bit7 bit6
0008h 0007h
0010h 000Fh
Field name
*1
Slave address
Parameter No.
Register start address (MSB)
Register start address (LSB)
Number of holding registers (MSB)
Number of holding registers (LSB)
CRC-16 (MSB)
CRC-16 (LSB)
bit5 bit4 bit3
0006h 0005h 0004h
000Eh 000Dh 000Ch
Example
(Hex)
01
03
*3
00
(Register address) = (Register number) − 1
*3
11
00
6 registers
06
95
CD
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
bit2 bit1 bit0
0003h 0002h 0001h
000Bh 000Ah 0009h