User's Guide

RFID TAG READER CHAPTER 3
ALH-900X USER’S GUIDE
DOC. CONTROL #8102114-000 REV A
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When locking, you have the option of locking the Access Password and Kill Password (both in the
Reserved bank) separately, so the Lock command has a list of tag memory fields instead of banks.
The other parameter is the type of lock: Lock, Unlock, PermaLock, and PermaUnlock. All locking
operations require you to confirm by clicking OK to an alert message. The “Perma” options are,
well, permanent, so use caution.
Locking a field doesn’t immediately protect it until you also write a non-zero Access Password to
the tag (and you should probably lock that field as well!). Please refer to the EPC Gen2 Protocol
Specification for complete details on how the various locking operations affect the tag’s behavior.
You must enter the hex data to write in
the field. The helpful popup keypad
makes entering hex data easy.
Verifying the success of the write, with
another read (of just the EPC code).
Now FEEDFACEDEADBEEF…
As on the Basic Access tab, you have full access to
the tag Mask and current Access Password in this tab.
On this screen, the read operation failed for two
reasons: the mask doesn’t match the tag’s new EPC
(FEEDFACEDEADBEEF…) and we’re trying to
access it with an incorrect Access Password.