Omron V680S-HMD63-ETN User Manual page 162

Section 7
Host Communications Specifications
Message Details
RF Tag Communications
 READ DATA
This query reads data from an RF Tag in the communications field.
 Query Format
Byte 0 Byte 1
Transaction
identifier
X
Parameter
Register address
Word count
 Response Format
Normal Response
Byte 0 Byte 1
Transaction
identifier
X
Parameter
Byte count
Read data
Error Response
Byte 0 Byte 1
Transaction
identifier
X
Parameter
Exception code
 Execution Example
Reading Eight Words of Data Starting from Word Address 1234 Hex in the RF Tag
TX: 000000000006FF0312340008
RX: 000000000013FF031011112222333344445555666677778888
RFID System
160
User's Manual
(Modbus TCP)
Byte 2 Byte 3 Byte 4
Protocol identifier Field length
X 0000 hex 0006 hex
Specify in 4-digit hexadecimal the start address for reading data.
Setting range: 0000 to 9FFF hex (Specify a word address.)
Specify in 4-digit hexadecimal the number of words of data to read.
Setting range: 0001 to 007D hex
Byte 2 Byte 3 Byte 4
Protocol identifier Field length
X 0000 hex 00 hex
Contains the number of bytes of data that was read from the RF Tag in 2-digit hexadecimal.
(02 to FA hex)
The data that was read from the RF Tag is attached.
Byte 2 Byte 3 Byte 4
Protocol identifier Field length
X 0000 hex
For details, refer to Exception Code Table in this section.
p.157
Byte 5 Byte 6 Byte 7
Unit Function
identifier code
FF hex 03 hex
Description
Byte 5 Byte 6 Byte 7
Unit Function
identifier code
FF hex 03 hex
Description
Byte 5 Byte 6 Byte 7
Unit Function
identifier code
0003 hex FF hex 83 hex
Description
Byte 8 Byte 9 Byte 10 Byte 11
Register address Word count
2 bytes 2 bytes
Byte 8 Byte 9 ··· Byte n
Byte
Read data
count
1 byte 2 to 250 bytes
Byte 8
Exception
code
1 byte