User`s manual

108
Section 4
Write Protection Function
RFID System
User's Manual
Section 4
Functions
 Write Protection Setting Examples
(1) Settings to Write-protect Addresses 0015 to 0120 (hex)
(Start address < End address)
(2) Settings to Write-protect 1 Byte
(Start address = End address)
Specify the same address for the start and end
addresses.
(3) Settings when the End Address Is Greater Than
the Final Address in the ID Tag
(End address > Last address in ID Tag)
The ID Tag memory area is allocated from address
0000 to 03E7 (hex) when using the V680-D1KP@@.
Therefore, the addresses up to 03E7 (hex) will be
write-protected.
(4) Settings when the Start Address Is Greater Than
the End Address
(Start address > End address)
The area between 0004 (hex) and the end address
and the area between the start address and 03E7 (hex) are write-protected when using the V680-
D1KP@@.
 Canceling Write Protection
• Canceling Write Protection for an ID Tag
To cancel write protection, turn OFF the most significant bit of address 0000 (hex). The write protection
will be cancelled and the start and end addresses that are set for 0000 to 0003 (hex) will be ignored.
• Canceling Write Protection for the Hand-held Reader Writer
Use the PARAMETER SET command (SP) to disable the write protection function.
If write protection is disabled for the Hand-held Reader Writer, even turning ON the most significant bit
of address 0000 (hex) in the ID Tag will not enable write protection.
0000
03E7
0015
0120
Address
(hex)
Write-protected
area
to
Write-protected area
1 byte
0000
03E7
Write-protected area
0000
0006
03E7
End address
Start addres
s
Address
(hex)
Bit
76543210
0000
1 0000000
80
(Hexadeci-
mal)
0001
00010101
15
0002
00000001
01
0003
00100000
20