Omron V720S Series Operation Manual page 131

Troubleshooting
Communications Check Flowchart
Start
Turn ON the Controller
and connect the host.
Send the WRITE command
in single auto mode.
Does the COMM
No
indicator go from ON
to OFF?
Yes
End code 70?
Yes
No
End code 71?
Yes
No
End code 72?
Yes
No
Are the
communications with Yes
the Tag OK?
No
Are the
communications with
Yes
the Tag OK?
Yes
OK
Is the moving
Yes
between Antenna
speed of Tag
OK?
No
Reduce the speed Adjust the direction
Is the Tag OK?
Yes
No
Replace the Tag Change the write page
Yes
*1
*1 More than one Tag in communications area for Antenna?
No
*2 Remove all but one Tag from the communications area.
*2
Is the distance
between the Antenna Yes
and Tag OK?
No
Adjust the distance. Replace the Tag.
Is the direction
Is the ambient
Yes
noise OK?
and Tag OK?
No
Check the noise level
Write-protected Yes
page?
No
Is the Tag OK? Yes
No
Is the
Yes
Tag OK?
No
No
Replace the Tag
Section 6-5
Yes
Replace the Controller.
6-9