KEYENCE LV-N10 Series User Manual

Page 64

4-3 Detection Settings (Func)

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- Digital Laser Sensor LV-N10 Series User's Manual -

Edge detection mode

In the edge detection mode, the sensor amplifier detects changes of received light
intensity over a fixed period.
This mode is used to turn on the output only when a workpiece is moving into or out of
the detection range of the sensor head.

• To turn the output ON when the received light intensity drops:

Select "~L_d" (Falling edge detection mode)

• To turn the output ON when the received light intensity increases:

Select "_|~d" (Rising edge detection mode)

Timing chart

• Combining the edge detection mode and any of the functions below

makes it more difficult to detect gradual changes in light intensity.

• If the interference prevention is "dobL" (double):

"Interference Prevention" (page 4-31)

• If the eco mode is "FuLL" (Full):

"Power Save" (page 4-29)

• This cannot be selected when LV-S31 is connected.

Sensitivity setting

Press the [SET] button with no workpiece present.

The amplifier is now configured to ignore
changes in received light intensity for the dura-
tion that the [SET] button is pressed.
Calibration is complete after the setting value
flashes momentarily, and then stops (lights up).

• When detecting workpieces run-

ning on a conveyor, the [SET] button can be pressed for a longer period
to ignore the fluctuations of received light intensity due to conveyor vibra-
tion.

• If the setting value is so low that objects other than the workpiece of interest

are also detected, fine adjustments can be made with the

button.

Refer to page 4-2 "Detection Settings (Func)" for setting methods.

When the falling edge detection mode is selected with a thrubeam model:

(1), (3):The output is OFF because the

received light intensity is not
changing.

(2)

:The output is ON because the

received light intensity is decreasing.

(4)

:The output remains OFF because

the received light intensity is
changing but is increasing.

Operation example

(1)

(2)

(3)

(4)

OFF

Control output

Received light intensity

Point

Reference