Lock Setting (Lk): I.code1 Mode Only - Omron V720S Series Operation Manual

System Command

5-4-11 Lock Setting (LK): I.CODE1 Mode Only

This command is used to set and check the lock (write-protection) of Tags incorporating I.CODE1
chip. A Tag can be locked (or write-protected) by memory page. To read lock information set in a
Tag, set all lock information in the commands to 0.
<Command Format>
STX Node No.. Command code
1 2
Lock setting
* The lock information for each page is represented by a 1-bit datum.
b7 b6
Page Page Page
10 9
AI: Application ID
<Response Format>
STX Node No..
1 2
Response code
Lock setting Infor-
mation
Description: This is an example of command and response when locking pages 1, 3, 7, and 8 in a
Caution
!
5-30
Lock setting
"LK"
2
Set the bit corresponding to the page you want to lock to 1. *See the table
below.
<Lock setting check>
Set all lock settings to 0 to read the lock information in a Tag.
b5 b4 b3 b2
Page Page Page
8 7 6 5
FC: Family Code
Command code Response
Retry
"LK"
flag
1 2
00:normal completion
For other response codes, refer to 5-2-4 Response code List.
Indicates lock information set in a Tag.
Tag in which page 10 has already been locked. This example does not include STX,
ETX, BCC, and the node number. The lock setting in the response included informa-
tion concerning the pages that have already been locked.
Command: LK3140
Response: LK00B143
Note SNR (Tag-specific code) is locked at factory. SNR 2 bit in the lock setting in
the response is always on.
Use utmost care when using the LK Command because once a page has
been locked, it cannot be unlocked. It is strongly recommended that you
use a system command to lock a page rather than using this command.
Note This command is for I.CODE1 Mode Only. The command is not available in
ISO mode.
ETX BCC
4 1 1
Lock setting
b1 b0 b7 b6
Page Page Page Page
3 2 1
4
Lock setting Information
code
"00"
2 4
b5 b4 b3 b2
Page A E Q Write-
0 I A U protect
,F S I
C E
T
ETX BCC
1 1
Section 5-4
b1 b0
S S
N N
R R