Auto scan mode (two types) – KEYENCE BL-N90 Series User Manual
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3-2 Selecting the Reading Mode
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Auto scan mode (two types)
BL-N90 has a sensor built into the transmitter/receiver.
Auto scan mode is a mode that automatically starts
emitting
a laser after the sensor detects an object such as white
paper.
There are two types of modes:
"Auto-scan/trigger switch reading mode" and
"Auto-scan/auto-reading mode".
Select the sensor detection distance from the following options (
•
Mid-distance: 0 to 100 mm (±25 mm)
•
Long distance: 0 to 230 mm (±50 mm)
The initial setting (factory default) is "Long distance".
Auto-scan/trigger switch reading mode (target reading)
This mode is useful in situations such as reading barcodes that are aligned in a column
with only a narrow space between them.
Bringing the BL-N90 close to the barcode sheet starts the laser emission. Align the laser
with the barcode you want to read and press "Trigger" to perform the scan.
Press "Trigger" while the laser is emitted to read several barcodes in a row.
If a barcode is not read, or if the barcode sheet is moved far away, the laser turns off
after 3 to 10 seconds.
Note
If the laser turns off while reading a barcode, move the barcode sheet out of the sensor
detection range once, then bring the sheet close again to start emitting the laser.
Detection
sensor