User's Manual

WJM Series User’s Manual V01.00 www.wj.com 1/12/07 Page 14
Reader does not write tags
• Tag has been locked or has an unknown access password
• Tag is too far from the antenna
6.3 Tag Programming
Programming of RFID tags is more complicated than simply reading tags: there
is a substantial amount of communication between the tag and reader. Writing to
the tag requires more power for a longer period of time than reading. It is most
often the case that a tag can be read at a longer range than it can be
programmed (assuming the same conditions.)
To improve tag write/programming reliability and success it is
recommended that the tag be brought closer to the antenna so as to
receive the maximum RF field strength. It is important that the tag
and reader not be moving relative to each other. While individual
results will vary depending on tag type, environment and other such
variables, these guidelines have been shown to increase the chance of
successful tag programming.
6.4 Additional Information
Additional information can be found in the tech support section of the WJ
website. These pages will contain application notes, an FAQ and an online user
forum. Before contacting technical support, please have your firmware and
software upgraded to the latest version.
For technical support please visit the WJ website for the latest information as well
as Frequently Asked Questions (FAQs) and find and share answers to problems
on the online user forum.