40
ASCII Protocol - Reference Guide
May ’00
2.5.5
LOCK PAGE Command
The LOCK Page command enables you to make a certain page of an MPT inacces-
sible to programming. ASCII character O initiates the LOCK page procedure. The TI-
RIS reader echoes the character as an acknowledgment and is now ready to accept
the page to be locked (01 to 11
hex
). The following two response formats from the TI-
RIS reader are possible after trying to lock a transponder page:
Antenna number, status, transponder type, space, page, space, application
code, space, identification number, carriage return and line feed if a trans-
ponder protocol could be received
or
antenna number, optional I, carriage return and line feed if no valid transpond-
er response could be detected by the TIRIS reader.
Status 1 (read locked page) in the Multipage transponder protocol provides you with
information about a successful locking of the page.
Example:
Comment
PC --> Reader
O
initiates Lock - command
Reader --> PC:
O
PC --> Reader
05
page to be locked in hexadeci-
mal format
Reader --> PC:
11M 05 1074 4497462691794938<CR><LF>
successful locking of page 05,
displayed in decimal format
1<CR><LF>
command not executed
For a more precise overview of possible responses refer to Chapter 3: "Possible
Reading Responses".
Note:
If more than one MPT is in the field of the antenna, all of the trans-
ponders might be programmed with the same number. If more than
one MPT send back their identification number at the same time and/
or if the transmission is corrupted, the TIRIS reader will indicate that
programming has failed, even though the transponder was pro-
grammed correctly.
