Write access conditions – Rockwell Automation 56RF RFID System User Manual User Manual
Page 21
Rockwell Automation Publication 56RF-UM001A-EN-P - October 2011
21
RFID Components
Chapter 2
Write Access Conditions
The Write Access Condition bits in block -1 determine the write access
conditions for each of the 28 user blocks and the special data block. These bits
can be set only to 1 with a lock command (and never be changed back to 0), i.e.
already write protected blocks can never be written to from this moment on.
In block -2 each byte can be individually locked.
Table 11 - Write Access
Block -1
Byte 0
Byte 1
MSB
LSB
MSB
LSB
Conditon
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Write
Access for
Block
Number
3
2
1
0
-2
(3)
-2
(2)
-2
(1)
-2
(0)
11
10
9
8
7
6
5
4
Block -1
Byte 2
Byte 3
MSB
LSB
MSB
LSB
Conditon
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Write
Access for
Block
Number
19
18
17
16
15
14
13
12
27
26
25
24
23
22
21
20
IMPORTANT
Changing of the Write Access conditions must be done in secure environment.
The label must not be moved out of the communication field of the antenna
during writing. We recommend to put the label close to the antenna and not to
remove it during operation.