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RFID System
User's Manual
SECTION 4
Write Protection
SECTION 4
Functions
Write Protection
The write protection function protects important data stored in the memory of a RF Tag, such as the product
model or type, from being overwritten inadvertently.
Enable the write protection function after writing important data as described in this section.
Setting Write Protection
For the write protection function to be effective, it must be enabled or disabled in both the FL Remote
ID settings and the RF Tag settings.
1. FL Remote ID Settings
The write protection function can be enabled or disabled by setting the write-protect bit of the FL
Remote ID in the I/O Allocation Table.
Refer to the I/O Allocation Table and Signal Names and Functions for details.
p.60, p.61
2. RF Tag Settings
Write protection for individual RF Tags is set in the most significant bit of address 0000 hex.
Write protection is set in the 4 bytes from RF Tag address 0000 to 0003 hex.
• Write-protect bit (most significant bit of address 0000 hex)
1: Write-protected (Enable)
0: Not write-protected (Disable)
• Addresses in RF Tag Memory That Can Be Write Protected
Start address: 0000 to 7FFF hex
End address: 0000 to FFFF hex
Note: If the write protection function is not used, the write protection setting addresses can be used as
user memory. When doing this, make sure that the write-protect bit is disabled in the FL Remote
ID.
Address Bit 7 6 5 4 3 2 1 0
0000 hex Enable/disable Upper two digits of start address (00 to 7F)
0001 hex Lower two digits of start address (00 to FF)
0002 hex Upper two digits of end address (00 to FF)
0003 hex Lower two digits of end address (00 to FF)
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