Omron I537-E2-01 User Manual page 188

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RS-422A/485 Message Example
An example of RS-422A/485 command/response messages is given below.
Reading Storage Register Contents
Read the contents of the storage register only for specified quantities. The addresses must be consecutive,
starting from a specified address. The data content of the storage register are separated into higher 8 bits and
lower 8 bits.
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
-56
6
(During Normal Operation)
02H Slave Address
03H Function Code
Number of attached
Higher 00H
data bytes
Lower 20H
Lead stor-
age register
Higher 00H
Lower 04H
Next stor-
age register
Higher 45H
Lower F0H
Next stor-
age register
Next stor-
age register
CRC-16
Response Message
02H Slave Address
03H Function Code
08H
Higher 00H
Lower 65H
Higher 00H
Lower 00H
Higher 00H
Lower 00H
Higher 01H
Lower F4H
Higher AFH
Lower 82H
Response Message
(During Error)
02H
83H
Error code 03H
Higher F1H
CRC-16
Lower 31H