Omron SYSDRIVE 3G3RV Series User Manual page 298

nDSR Message
An example of command/response messages is given below.
Reading Storage Register Contents (Function Code: 03 Hex)
Read the contents of the storage register only for specified quantities whose addresses are consecutive, starting
from a specified address. The contents of the storage register are separated into higher place 8 bits and lower
place 8 bits, and comprise the data within response messages in address order.
The following table shows message examples when reading status signals, error details, data link status, and
frequency references from the slave 2 Inverter.
Command Message
Slave Address
Function Code
Start
Address
(register
number)
Quantity
(10H max.)
CRC-16
-82
6
02H Slave Address
03H Function Code
Higher Number of attached data
00H
place
Lower
20H
place
Lead stor-
age register
Higher
00H
place
Lower
04H
place
Next stor-
age register
Higher
45H
place
Lower
F0H
place
Next stor-
age register
Next stor-
age register
CRC-16
Response Message
(Normal Meesage)
02H
03H
08H
bytes
Higher
00H
place
Lower
65H
place
Higher
00H
place
Lower
00H
place
Higher
00H
place
Lower
00H
place
Higher
01H
place
Lower
F4H
place
Higher
AFH
place
Lower
82H
place
Response Message
(Error Message)
Slave Address 02H
Function Code 83H
Error code 03H
Higher
F1H
place
CRC-16
Lower
31H
place
Note The MSB of the function code will be
set to 1 when an error occurs.