Table of Contents
Advertisement
Write Protection Function
The write protection function prevents important data, such as product information, stored in memory in
a Tag from being inadvertently overwritten.
After important data has been written to memory, it can be write-protected using the following method.
The write protection function can be switched with SW4-7 (Write Protection Function Setting) of the V680-CA5D@@-V@
Controller or with word (Write Protection Function Setting) in the DM(m+2)CH Area words allocated to the C@1W-
V680C@@ ID Sensor Unit.
Setting the Write Protection Function
Write protection is set in Tag addresses 0000H to 0003H.
The setting for the most significant bit of address 0000H specifies whether or not write protection is enabled.
Address
Bit
7
YES/
0000
H
NO
Lower two digits of start address
0001
H
Upper two digits of end address
0002
H
Lower two digits of end address
0003
H
• Write-protect Bit (Most significant bit of address 0000H)
1: Write-protected (Yes)
0: Not write-protected (No)
• Write Protection Setting Area
Start address: 0000
to 7FFF
H
End address: 0000
to FFFF
H
Write Protection Setting Examples
• Settings to write-protect addresses 0008H through 03E7H:
Address
Bit
7
1
0000
H
0
0001
H
0
0002
H
1
0003
H
• Settings to not write-protect any addresses:
Address
Bit
7
0
0000
H
0
0001
H
0
0002
H
0
0003
H
The write protection function is a function of the V680-CA5D@@-V@ Controller and the C@1W-V680C@@ ID Sensor
Unit. It is not supported by reader/writer units from other manufacturers.
6
5
4
3
2
Upper two digits of start address
H
H
6
5
4
3
2
0
0
0
0
0
8
0
0
0
1
0
0
0
0
0
0
0
0
1
1
0
0
1
E
6
5
4
3
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Specifications and Performance
1
0
(00
to 7F
)
H
H
(00
to FF
)
H
H
(00
to FF
)
H
H
(00
to FF
)
H
H
1
0
0
0
0
0
0
8
1
1
3
1
1
7
1
0
0
0
0
0
0
0
0
0
0
0
0
0
Section 2
RFID System
41
User's Manual
Advertisement
Table of Contents
