User's Guide

April 4, 2019
USER GUIDE: UBS-200L LF DESKTOP READER
15
Chapter 3 – Operating and Configuring the UBS-200L | Unified Information Devices
001.006.03 v1.3
Reading/Writing Transponders
Get Transponder “GT”
The “GT” (Get Transponder) command causes the UBS-200L to return the ID of a transponder that is in
range. In the above example, the UBS-200L returns “XXXXXXXX” when no transponder is present, and
“11467227” (the transponder ID) when a transponder is present.
The “GT” command is used when the UBS-200L is in “Standby” mode. Once issued, the UBS-200L
searches for a transponder until the time-out (TOR) value is reached. If a transponder enters the UBS-
200L’s antenna field during this time, the transponder data is returned. If no transponder is read prior
to the time-out, “XXXXXXXX” is returned, and the reading cycle ends.
Information:
If the “CN” parameter is set to 1 and no transponder is presented,
the “XXXXXXXX” indicator will be suppressed, and NOTHING will
be returned to the host.
Get Transponder Custom “GTC”
The “GTC” (Get Transponder Custom) command can be used to customize the data being returned from
the queried transponder. The command is followed by two parameters. The first parameter (0 or 1)
determines whether or not the transponder ID is included in the response. The second parameter (1-7,
or 1-10 for older “Classic” transponders) determines how many memory blocks are returned. See the
examples in Figure 9.
Figure 9. GTC Command Examples.