KEYENCE BL-180 - Manual (Page 76)

A.6 Troubleshooting
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A.6 Troubleshooting
If a problem occurs during operation, please check the following troubleshooting
notes first. If you cannot fix the problem, contact KEYENCE or your nearest deal-
er.
Bar codes cannot be read.
Check whether the light source LED is ON.
When using a power supply other than the BL-U1 special power supply unit, con-
firm that the power supply voltage and capacity is within 5 VDC±5% and 300 mA.
Check the wiring of the power supply unit and the timing input terminal (see p. 11).
Connecting the power supply unit with the reverse polarity may damage the BL
series.
If the BL-180 does not operate, contact KEYENCE.
Check the bar code setting (type, No. of digits).
Check the following parameters using the setup software.
• Bar code type, No. of digits.
• Setting of the check digit inspection (enabled or disabled)
• Setting of the label orientation-specified reading
when using CODE39 or Codabar, include the start/stop characters and check dig-
it in the number of digits.
For Code128, see page 70.
Check the distance and angle between the BL-180 and bar code.
Check the distance and angle while referring to “Mounting angle and mounting
distance” on page 7.
Check the bar code margins (quiet zones).
A bar code requires the right and left margins to be at least 10 times wider than
the narrow bar width.
If the bar code margins are too narrow, it may not be read.
Check the bar code label length.
The bar code label length is the lateral length of a bar code including the right and
left margins (quiet zones).
When the narrow bar width (the minimum bar width) is 0.125 to 0.19 mm (less
than 0.19 mm), the readable label length is up to 60 mm length. When the narrow
bar width is 0.19 to 1.0 mm, the readable label length is up to 80 mm.
Check the bar code.
A bar code with blurred sections, defects or stains may not be read correctly.
Bar codes printed with dot matrix or ink jet printers are prone to such problems.
CAUTION
Note