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Diagnostic
result
A/B
Communications performance was
reduced because of the influence of metal
around the RF Tag.
A/B
Communications performance was
reduced because of the influence of metal
around the Reader/Writer.
A/B/C/E
Communications performance was
reduced due to the influence of reflected
radio waves.
C
Communications performance was
reduced by the influence of radio wave
interference from a wireless device near
the Reader/Writer.
C
Communications performance was
reduced by the influence of interference
from a low-frequency device near the
Reader/Writer.
D
The RF Tag is traveling too quickly.
E
The RF Tags are too close to each other.
Getting RF Communications Diagnostic Information
You can check information on measurements and diagnostics that were performed in RF Tag com-
munications for the last communications command that was executed by the Reader/Writer.
You can check the communications diagnostic information by sending a command from the host
device. You can also use the communications option of an expanded command to get diagnostic
results in one response.
The following table lists the information that you can get in the communications diagnostic informa-
tion.
Item
Time
Command code
Communications result
(error code)
Diagnostic result
Diagnostic details
Channel used
UHF RFID System V780-series Reader/Writer User's Manual (Z389)
Possible cause
Description
Indicates the time that the Reader/Writer communi-
cated with the RF Tag.
Indicates the code that identifies the communications
command that was executed.
Indicates the code that identifies the communications
command that was executed.
Indicates the code that identifies the result of commu-
nications diagnostics.
Communications normal, communications error, insuf-
ficient power to send, insufficient power to receive, too
much noise, insufficient signal-to-noise ratio, insuffi-
cient read data, or excessive read data
Indicates all diagnostic results detection status as bit
information.
Indicates the channel used when communicating with
an RF Tag.
Workaround
Remove all metal from around the RF Tag.
* If the recommended RF Tag
(V780-A-JIME-BLI-10) is mounted on a metallic
material, install it on an Attachment
(V780-A-TA-133-10).
Remove all metal from around the Reader/Writer.
* Metal behind the Reader/Writer will not influence
performance.
Change the position of physical structures or the
Reader/Writer and find the best radio wave environ-
ment.
Move wireless devices away from the
Reader/Writer.
Move low-frequency devices away from the
Reader/Writer.
Reduce the speed of the RF Tag.
Separate the RF Tags farther from each other.
Indicates the channel
selected by a Reader/Writer
when the channel setting is
"Automatic."
6 Functions
6
Remarks
6 - 39
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