Omron V680 Series User Manual page 197

 GET MAC ADDRESS
This query reads the MAC address from the Reader/Writer.
 Query Format
Byte 0 Byte 1 Byte 2
Transaction
Protocol identifier
identifier
X X 0000 hex
Parameter
Register address
Word count
 Response Format
Normal Response
Byte 0 Byte 1 Byte 2 Byte 3
Transaction Protocol
identifier identifier
X X 0000 hex
Parameter
Byte count
MAC address
Error Response
Byte 0 Byte 1 Byte 2
Transaction
Protocol identifier
identifier
X X 0000 hex
Parameter
Exception code
 Execution Example
Reading the MAC Address When It Is 11-22-33-44-55-66
TX: 000000000006FF03C2000003
RX: 000000000009FF0306112233445566
Byte 3 Byte 4 Byte 5
Field length
0006 hex
The register address (C200 hex) that specifies the MAC address.
The number of words in the MAC address to read (0003 hex)
Byte 4 Byte 5 Byte 6 Byte 7
Unit
Field length Function code
identifier
0009 hex FF hex 03 hex
The number of bytes in the MAC address that was read (06 hex)
Contains the MAC address that was read as a 12-digit hexadecimal between 000000000000 and
FFFFFFFFFFFF hex.
Byte 3 Byte 4 Byte 5
Field length
0003 hex
For details, refer to Exception Code Table in this section.
p.167
Host Communications Specifications
Byte 6 Byte 7 Byte 8
Unit Function
Register address
identifier code
FF hex 03 hex C200 hex
Description
Byte 8 Byte 9 ···
Byte count MAC address
06 hex 6 bytes
Description
Byte 6 Byte 7 Byte 8
Unit Function Exception
identifier code code
FF hex 83 hex 1 byte
Description
Section 7
Byte 9 Byte 10 Byte 11
Word count
0003 hex
Byte 14
RFID System
User's Manual
(Modbus TCP)
195