Omron V500-R521B2 User Manual page 117

Section 6
Appendix
Troubleshooting
Data is not transferred to the upper equipment.
Does the power
supply 5 V± 10 %
properly?
Does READ OK LED
illuminate?
Is the wiring of
RS-232C correct?
Is the program
of the upper equipment
side correct?
Change the bar code reader.
(Or send it back to the manufacturer.)
Troubleshooting when communication link unit is used p.110
V500-R521B2/C2
120
User's Manual
Check external power wiring and voltage.
* When connected reversely even only once, internal fuse of the bar code
reader will be disconnected.
1. Check the function setting content. Especially,
check the operation mode and data output mode.
2. Is the bar code mounted or does it pass at the reader
reading position?
3. Are there enough margin on both sides of the
barcode? Is the bar code width rate in accordance
with the standard?
4. Do the label size, thickness of a slim bar, and
contrast (PCS) satisfy the catalog value?
5. Are there any dirt on bar code or on reading window
of the bar code reader?
6. Is the voltage of trigger input 1.5 V or less when
turned on?
1. Isn't the polarity of the transmission line wrong? Especially
for SD, RD and SG.
2. Does the communication condition match with the upper
equipment? Check the setting condition. Especially, notice
for baud rate.
1. Check the operation of the upper unit side and the
operation manual.