E3XA51 Datasheet, PDF (10/17 Pages) Omron Electronics LLC – Fiber-Optic Photoelectric Sensor

E3X
E3X
s VARIABLE HYSTERESIS FUNCTION (E3X-H11)
Detection of Plate Level Differences
(If detection is impossible with the hysteresis value set to
maximum)
Refer to the following when using the hysteresis adjuster.
Reflection
of light
Reflection
of light
Reflection
of light
Large hysteresis
differential
ON
OFF
ON
OFF
Small hysteresis differential
ON
OFF
A
B
ON Unstable
Detecting operation is not stable
because zone B is within the
hysteresis differential range.
A
Unstable
B
OFF
Reduce the sensitivity of the E3X
with the sensitivity adjuster and turn
off zone B.
A
B
ON
OFF
Reduce the hysteresis value with
the hysteresis adjuster so that zone
A will be ON.
Set both the sensitivity
adjuster and hysteresis
adjuster to maximum.
1s
SENS
Decide the position of
the fiber head and that
of the sensing object in
zone A.
Locate the head in
zone A and turn the
sensitivity adjuster
counterclockwise slowly
until the stable operation
indicator and light reception
indicator are OFF (i.e.,
position E as shown in
the illustration).
min max
Sensitivity
adjuster
(E)
1s
SENS
min max
min max
Hysteresis
differential
adjuster
B
A
(example)
When the
head is located in zone B,
light reception indicator
is lit.
YES
SL
NO
SL
Locate the head
in zone B and turn the
hysteresis adjuster counterclockwise slowly
and make sure that the light
reception indicator
is lit.
YES
min max
NO
SL
SL
Set the hysteresis adjuster
to the point where the light
reception indicator is lit
(i.e., position E as shown
in the illustration.)
(H)
min max
Set the hysteresis
adjuster to maximum.
Locate the head in
zone A and turn the
sensitivity adjuster
clockwise until the
stable operation
indicator and light
reception indicator
are OFF (i.e., position
F as shown in the
illustration.)
min max
(F)
(G)
1s
SENS
min max
Detection is possible
The light reception
indicator is lit when the head
is located in zone B and the light
reception indicator
is OFF when the head is
located in zone A.
YES
SL
11
NO
SL
Locate the head in
zone A and turn the
sensitivity adjuster
counterclockwise
until the light reception
indicator and stable
operation indicator are
OFF (i.e., position O
as shown in
the illustration).
(E)
(G)
1s
SENS
min max
11