E3X-N Datasheet, PDF (24/52 Pages) Omron Electronics LLC – Teaching Optical Fiber Photoelectric Sensor

E3X-N
E3X-N
No-object Teaching with an Initial Operating Level Compensation Function
With Through-beam (Dark-ON) Fiber Unit
1. Teaching button is pressed once.
2. The first sensing object is in the sensing area.
Large
Light
Small
10 %
10 %
Operating level
Light level with
no object
Operating level
Set the operating level to
±10% of the light level.
0
Large
Change to
RUN mode
Light
The light value decreases and
the Photoelectric Sensor works
in through-beam operation.
OFF
ON
10%
Operating level
Small
0
3. Sensing objects continue to pass through the sensing area.
Large
Considering a drop in light value due to optical axis divergence or dust
on the lenses, sample the light of the first to fifth objects. Then reset the
operating level to the median value between the lowest light with a sens-
ing object and the light without sensing object.
Light
(1)
(2) (3)
(4)
(5) (6)
Operating level
Small
0
Resetting
With Reflective (Light-ON) Fiber Unit
1. Teaching button is pressed once.
Large
Light
Small ₀
10%
10%
Operating level
Light level of
background
Operating level
Set the operating level to
±10% of the light level.
2. The first sensing object is in the sensing area.
Large
Change to
RUN mode
Light
ON
OFF
Operating level
10%
Small
The light level increases and the
Photoelectric Sensor works in re-
flective operation.
0
3. Sensing objects continue to pass through the sensing area.
Large
Resetting
Light
Operating level
(1) (2)
(3)
(4)
(5)
(6)
Small
Considering the sensing object positions and the color differences of
sensing objects, sample the light of the first to fifth objects. Then reset
the operating level to the median value between the lowest light with
a sensing object and the light without a sensing object.
0
Note: If the light value up to the fifth object is at least twice
as large as the operating level, the initial set operat-
ing level (10%) will be maintained.
Note:
1. After no-object teaching, when the E3X-Nj is turned off and on, the operation level will be set to the +10% of the initial light level
(refer to the above (1)) in reflective operation and –10% of the initial light level in through-beam operation and stand by.
2. After performing no-object teaching and changing to RUN mode, until the first sensing object is in the sensing area, the control
output will be prohibited (OFF). The control output will be determined when the first sensing object is detected.
3. The initial operating level compensation function will operate after teaching and/or after the E3X-Nj is turned on.
4. During no-object teaching, after the E3X-Nj is in RUN mode, each channel requires approximately 60 ms to determine the operat-
ing level from the time the first sensing object is in the sensing area. Therefore, when using the E3X-NM (four channels), set an
interval of 60 ms minimum for each channel if sensing objects are forwarded in sequence to the sensing area of each channel. After
the operating level is determined, the E3X-NM will operate with a normal response speed of 500 µs.
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