KEYENCE LV-SA - Manual (Page 5)

5 E LV-S-IM
Area Detection Mode
This mode is suited to detecting the received light intensity only of a certain range.
To set this mode, select the area detection mode among the detection
modes. (page 6, No. 4, or page 7 No. 5)
The display of the setting values of the upper and lower limits can be
switched with the channel selection switch.
Keep the range of setting value 1 > setting value 2.
Nothing is detected when setting value 1 ð setting value 2.
Output 2 cannot be used while the area detection mode is in use.
■ Sensitivity setting method 1 (Normal sensitivity)
1
Place a workpiece on the upper
limit of the received light intensity
that you want the sensor to detect,
and press the SET button once.
2
Place a workpiece on the lower
limit of the received light intensity
that you want the sensor to detect,
and press the SET button once
again.
If the sensitivity difference does not have enough room, “+++” flashes after
the calibration is finished. The setting value is changed at this time, too.
■ Sensitivity setting method 2 (when % calibration is selected)
1
Place a workpiece on the
designated position, and press the
SET button once.
Specify the setting values to the
upper and lower limits of the time
when you press the SET button.
Example: When the setting value of the % calibration is set to 10P
The value that is the received light intensity when the SET button is pressed
plus 10% is set for the setting value 1, and minus 10% for the setting value 2.
■ Bank function
Normally, up to two setting values can be set, but by using the bank function,
up to four setting values can be set.
Usage
1
When selecting the control input function (page 6, No.8, or page 7, No. 7),
select the bank selection.
2
The normal bank A becomes bank B while the signal is input in the
following method.
* LV-11SA/11SAP only
Set or change the bank B while the input signal is input.
Setting the Display Scaling
This is the function to adjust the received light intensity during operation to the
“scaling target value”. (not available for the LV-S31)
Usage
1
When setting a display scaling (page 6, No. 6), select to use the display
scaling, and set the target value. (The explanation here deals with the
case where the target value is set to 2000.)
2
During the normal display, press the SET button while pressing the MODE
button.
The display changes as follows, and the target value (which is 2000) to be
set as a scale is displayed.
↓
The display scaling is performed.
The reference light intensity can be set in the following range in reference with
the currently received light intensity:
Special function
After an external calibration, the scaling can be externally performed by
inputting the signal again in three seconds.
•
In the case of the % calibration (example)
* Input is not accepted while setting any mode. (page 6)
Shift Function
Forcibly synchronizes the received light intensity with the preset value (shift
target value). (Adds and subtracts the received light intensity.)
Regular synchronization inputs from a PLC or other device stabilizes the
detection of the target that has a little light intensity difference.
Usage
3
When setting a shift function (page 6, No. 7, or page 7, No. 8), select to
activate the shift function, and set the shift target value.
* LV-11SA/11SAP only
* Whether or not to save the current display status changed by an external input
can be selected in the special mode (See “How to set the special mode” on
page 7). The default is to “Save”.
It is recommended that you set “Do not save” when the external input is fre-
quently performed. The maximum number of times of writing is one million.
Setting value 1 (Upper limit)
Setting value 2 (Lower limit)
ON
OFF
OFF
Received light intensity
1: Setting value upper limit
2: Setting value lower limit
1: Upper limit
2: Lower limit
Brown*
Blue*
Pink
Brown*
Pink
Blue*
+V
0 V
+V
0 V
LV-11SA/12SA LV-11SP/12SP
Power mode Minimum value Maximum value
The error is indicated
when the value is out of
the range.
HSP Approx. 1/20 times Approx. 16 times
FINE Approx. 1/40 times Approx. 8 times
TURBO Approx. 1/80 times Approx. 4 times
SUPER Approx. 1/160
times
Approx. 2 times
ULTRA Approx. 1/320
times
Approx. 1 time
%calibration Display scaling
Input ON
Input OFF
Within 3
seconds
%calibration %calibration
Input ON
Input OFF
3 seconds
or more
Brown*
Blue*
Pink
Brown*
Pink
Blue*
+V
0 V
+V
0 V
LV-11SA/12SA LV-11SAP/12SAP