Section 7 Message Details
Section 7
Host Communications Specifications
177
RFID System
User's Manual
(Modbus TCP)
RF TAG OVERWRITE COUNT CONTROL
This query is used to manage the number of times data is written to an RF Tag. You can use this query
for RF Tags with EEPROM memory.
Query Format
Response Format
Normal Response
Error Response
Execution Example
Setting 5,000 (1388 Hex) as the Count in Overwrite Count Address 0080 Hex in the RF Tag with an
Addition Specification
TX: 00000000000FFF10A3000004080000008000001388
RX: 000000000006FF10A3000004
Parameter Description
Register address The register address (A300 hex) that specifies overwrite count control.
Word count The number of words of overwrite count information (0004 hex)
Byte count The number of bytes of overwrite count information (08 hex)
Overwrite count
information
Operation Initialize: 0000 hex, Subtract: 0001 hex, Add: 0002 hex
Address
Specify in 4-digit hexadecimal the start address of the overwrite count control area in the RF Tag.
Setting range: 0000 to 9FFF hex
Count Specify the count in 8-digit hexadecimal.
Parameter Description
Register address Contains the register address that was specified in the query.
Number of words of overwrite
count information
Contains the word count that was specified in the query.
Parameter Description
Exception code For details, refer to Exception Code Table in this section.
p.167
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8 Byte 9 Byte 10 Byte 11 Byte 12 Byte 13
···
Byte 20
Transaction
identifier
Protocol
identifier
Field length
Unit
identifier
Function code Register address Word count
Byte
count
Overwrite count information
X X 0000 hex 000F hex FF hex 10 hex A300 hex 0004 hex 08 hex 8 bytes
Byte 13 Byte 14 Byte 15 Byte 16 Byte 17 Byte 18 Byte 19 Byte 20
Operation Address Count
2 bytes 2 bytes 4 bytes
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8 Byte 9 Byte 10 Byte 11
Transaction
identifier
Protocol
identifier
Field length
Unit
identifier
Function code Register address
Number of words of overwrite
count information
X X 0000 hex 0006 hex FF hex 10 hex A300 hex 0004 hex
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
Transaction
identifier
Protocol identifier Field length
Unit
identifier
Function
code
Exception
code
X X 0000 hex 0003 hex FF hex 90 hex 1 byte
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