User's Manual

Operation
6-5
received messages following an excitation.
• Flags status. Field FG gives you information regarding the battery status and the type of
excitation recognized by the tag.
Remember: To enable the frequency measurement function for the TQ21 parameter DFI must be
set as DFI=Y and the command B must be active (LF excitation field enabled).
The recommended procedure for testing a tag is the following:
• Check if the tag to be tested (EUT) was outside an LF excitation field for at least 10 s before
testing, and the command C is active for TQ21 (LF excitation disabled).
• Place the EUT inside the slot marked "Postal Tag" on the TQ21, with the battery side first
(battery to be at the bottom of the TQ21's slot).
• Send the command B.
• Check the content of the received messages on the PC. Dedicated software can be provided in
order to automatically process this information and to give just the "Pass" or "Fail" mark.
• Send the command C.
Remember: Tag PT21 must be keep at least 10 s outside the LF excitation field before it can accept
a new excitation.
Programming Tags TQ21 is capable of programming and querying tag PT21/T96.
The procedure of programming and querying is identical with the procedure used for tags T95
described in the User's Guide RFID S9. It includes the commands :TAG:MATCH (shortcut M),
:TAG:CLONE and :TAG:QUERY (shortcut Q), setting the "wanted" parameters (group W) and
querying the parameters (parameters from group T).
There are several particularities regarding the query/programming procedure.
• The tag programming function is performed without being necessary to change the status of
parameter DFI (works with DFI=Y and DFI=N).
• Tag PT21 must be kept at least 10 s outside the LF excitation field (command C active for at
least 10 s) between two consecutive commands M and/or Q.
• Tag must be inside the TQ21's slot for the whole duration of the query or programming
process; these processes are finished when the Data LED on the TQ21 stop flickering.