KEYENCE LV Series - Manual (Page 5)

5 LV Series-IM_E
„ Two-point tuning
„ Maximum sensitivity setting
For the reflection type sensor, adjust the sensitivity without using target. For the
transmission type sensor, adjust the sensitivity by using target.
„ Automatic tuning
If the setting does not work well, perform the two-point tuning.
„ Positioning tuning
„ Setting sensitivity
Quickly press once, to set sensitivity to its maximum value.
Perform fine-tuning adjustments using or , or refer to the details on hold
display below.
„ Received light intensity monitor
The received light intensity monitor displays the amount of differentiation. Use hold
mode switching with hold display ON.
„ Output state
The values displayed on the calibration LED monitor can be changed by pressing
(to increase sensitivity) or (to decrease sensitivity). This allows you to
fine-tune your setting values.
The display changes each time the MODE button is pressed.
The received light intensity/excess gain hold display appears only after peak/
bottom hold is selected in the hold mode.
For more information about hold display, refer to "Mode Setting" (p. 6).
You cannot select the excess gain display when the standard light intensity is set.
z Setting value display
Displays setting value.
z Received light intensity display
Displays received light intensity.
z Excess gain display
Shows the received light intensity as a percentage of the setting value (setting
value = 100%).
This display cannot be shown when the standard light intensity display is
selected.
Sensitivity Adjustment
1
With no target in place, press the
button lightly.
2
Put a target in place and press the
button again lightly.
1
According to the directions on the
left, press the
button for 3
seconds or more.
2
Confirm that the calibration indicator
(orange LED) and setting monitor
(green LED) are flashing.
3
Release the button.
1
Pass a target through the optical
axis while pressing the
button.
2
Confirm that the calibration indicator
(orange LED) and setting monitor
(green LED) are flashing.
3
Release the button.
1
With no target in place, press the
button lightly (orange LED lights
up).
2
Place a target in the position where
it should stop.
3
Press the button for 3 seconds or
more until the calibration indicator
(orange LED) and setting monitor
(green LED) are flashing.
S S
PH
A
B
BH
MODE SET
%
S S
PH
A
B
BH
MODE SET
%
The setting value
is displayed.
Received light
intensity
Setting
value
Time
The setting value is
adjusted to the
midpoint of the
difference in received
light intensity when the
target is absent and
present.
Reflection type
Transmission type
No target
Target is used.
S S
PH
A
B
BH
MODE SET
%
PH
A
B
BH
MODE SET
%
S S
S S
PH
A
B
BH
MODE SET
%
S S
PH
A
B
BH
MODE SET
%
The setting value
is displayed.
Received light
intensity
Time
The setting value is
adjusted to the midpoint
of the difference in
received light intensity
when the target is
absent and present.
Setting
value
MAX
MIN
S S
PH
A
B
BH
MODE SET
%
PH
A
B
BH
MODE SET
%
S S
PH
A
B
BH
MODE SET
% Received light
intensity
Time
The setting value is
adjusted to turn on the
sensor when the target
arrives at the place
where it should stop. Setting
value
Differentiation Mode (page 6)
UP edge DOWN edge
D.ON N.C. output N.C. output
L.ON N.O. output N.O. output
Differentiation Mode Detection (UP/DOWN edge)
Detects only sudden changes in received light intensity within a
certain time interval.
•
UP edge detection : Output is turned ON when light intensity
increases by more than the setting value
within a fixed time interval.
• DOWN edge detection: Output is turned ON when light intensity
decreases by more than the setting value
within a fixed time interval.
To achieve stable detection in differentiation mode, changes in
received light intensity resulting from the presence or absence of the
target must be greater than the changes in received light intensity
resulting from dust or vibration.
Fine Adjustment of Setting Values
If you press the button accidentally while performing a fine
adjustment of your setting values, a sensitivity calibration will
start automatically and prevent you from continuing your fine
adjustment until the calibration is completed. If this happens,
press the
button again to cancel the setting and start your
fine adjustment again.
The value may not change by 1 digit during fine-tuning
adjustments. This is not a malfunction.
Selecting Display Modes
The displayed value for excess gain is 0 when the excess gain is
less than 1%.
S S
Reference
Point S S
S S
M
PH BH %
PH BH %
PH BH %
PH BH %
Excess gain old
display
Light intensity
hold display When hold display
is selected
Press this button once. M Press this button once. M
Excess gain display(%)
Display Peak or
Bottom
Press this button once. M Press this button once. M
Light intensity display
Point