User's Manual

WJM Series User’s Manual V01.00 www.wj.com 1/12/07 Page 13
6 Troubleshooting / Technical Support
6.1 General
The reader does not connect to the demo software:
• Wrong COM port selected
- Verify the COM port of the reader in the Device Manager.
• Card is not powered
- Verify the green LED is lit on the MIB, and blue LED is blinking.
• Boot load switch is in Boot (MIB only)
- Switch the boot loader switch to the normal
6.2 Performance
Reader does not read tags
• Tag is not compliant with reader protocols
- WJM reads ISO18000-6B and ISO18000-6C (EPC Gen2) tags
• Antenna cables are not connected properly
- Make sure the antenna connections are tight.
• Antenna is polarized perpendicular to tag polarization
- Rotate the tag or the reader antenna 90 degrees.
• Wrong antenna selected
- With the top of the card facing you antenna ports up, antenna A is
on the left.
Reader performance is poor
• Antenna field affected by objects nearby
- Verify the reader’s antenna is free of nearby objects that would
partially cover the antenna; metal, hands, plastics: all these can
effect antenna operation.
• Tag is being obscured by objects nearby
- Tags perform poorly when in close proximity to metals and/or
liquids.
• Low power level
- Increase the transmit power setting
• Poor quality antenna
Read rate is slow
• Message log file has gotten too big, clear the message log found in the
“options” menu.
• Inventory period set too high
Adjust inventory period (delay time between reads)