User's Guide

April 4, 2019
USER GUIDE: UBS-200L LF DESKTOP READER
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Chapter 3 – Operating and Configuring the UBS-200L | Unified Information Devices
001.006.03 v1.3
Time-Show Code “TSC” value expires.
Sending the command “CID 0” returns the UBS-200L to its default setting, where the transponder ID is
sent every time it is read.
Suppress “XXXXXXXX” No-Read Message “CN”
To prevent the “XXXXXXXX” message from being sent to the host, send the “CN 1” command. While this
prevents the “XXXXXXXX” from being misinterpreted as data, it also means that there will be no
indication of the end of a read cycle in which no transponder is read.
Sending the command “CN 0” returns the UBS-200L to its default setting, where “XXXXXXXX” is sent to
the host at the end of a read cycle in which no transponder is read.
Misread Failure Protection “NID”
While corrupted data reads are rare, they are possible under specific circumstances. As such, it may be
desirable to validate the transponder ID through two consecutive reads. Sending the command “NID 1”
forces the UBS-200L to compare two consecutive reads of the same transponder. The transponder ID
will NOT be returned unless two consecutive reads are validated to be identical by the UBS-200L. This
may slow down the ID process, and is recommended only for circumstances requiring such redundancy.
It is NOT recommended for situations in which the transponder is difficult to read, or passes by the
antenna quickly.
Sending the command “NID 0” turns this functionality off, so that a transponder ID is returned with a
single valid read.
Note:
The NID redundancy check only works when reading IDs in MD 0
mode, or with the “GT” command. Setting NID parameter to 1
while in MD 4 mode or with the “GTC” will result in NO data being
returned.