
12. LED
The BHT has two LEDs, a display LED (red/blue) to notify the operator that barcode reading is complete, and a
charge LED (red/green) to notify the operator of the charge status.
The illumination status for the display LED can be controlled from the application.
The illumination status is set and acquired using a 2D indexer. The illumination device (display (barcode) LED
only on BHT-700) is specified for the first index, and the illumination color (red or green) is specified for the
second index.
[Ex.] Turn ON the red display LED.
[VB] MyLED. (LED.EN_DEVICE.BAR,LED.EN_COLOR.RED) _
= LED.EN_CTRL.ON
[C#] MyLED[LED.EN_DEVICE.BAR,LED.EN_COLOR.RED]
= LED.EN_CTRL.ON
The priority order relationship is as follows:
(Barcode read based control) > (application based control)
If “Turn ON LED when barcode reading complete.” is specified and barcode reading is enabled, the display
LED illumination status cannot be controlled from the application until barcode reading is next disabled.
The illumination request from the application, however, is retained in the variable flag (RAM) inside the LED
driver. Illumination requests are also set and cleared while barcode reading is enabled. When barcode reading
is disabled, the flag is checked and the LED color for which an illumination request exists is turned ON
automatically.
[Ex.]
Red Green
Statu
OFF OFF
Rqst. No No
Red Green
Statu
ON OFF
Rqst. Yes No
Red Green
Statu
OFF OFF
Rqst. Yes No
Red LED ON specified
from application.
Reading enabled
[Default
Red Green
Statu
ON OFF
Rqst. Yes No
Red Green
Statu
ON ON
Rqst. Yes Yes
Red Green
Statu
OFF OFF
Rqst. Yes Yes
Reading disabled
Blue LED ON
specified from
application.
Reading enabled
Red LED ON
Red Green
Statu
OFF OFF
Rqst. No Yes
Red Green
Statu
OFF ON
Rqst. No Yes
Red LED OFF
specified from
application.
Reading disabled
Blue LED ON
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