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BLA 50A-001-S115
Balluff Light Array
4
Operation and mode selection (cont.)
Fig. 4-11: Setting a nominal value (Preset) in the count mode.
If Preset is kept empty (- -), then the actual number is
always binary coded and output on the three digital
outputs:
Deci-
Out 3 Out 2 Out 1 Meaning
mal
0
0
0
0
1
0
0
1
2
0
1
0
3
0
1
1
4
1
0
0
5
1
0
1
6
1
1
0
7
1
1
1
If a number is set under Preset (possible values: 1...63),
then the digital outputs are used as follows:
Out 3 Out 2 Out 1 Meaning
0
0
0
No object detected in the light
band.
0
0
1
Number of objects in the light
band is smaller than the nominal
values (but at least one object
present)
0
1
0
Number equals the nominal
value
1
0
0
Number greater than the
nominal value.
The nominal-actual comparison is displayed in the value
display with smaller than, larger than, and equal signs
(<, >, =) directly underneath the number of detected
objects.
Fig. 4-12: Value display: example of count objects (CO) with random
object diameter ("All") with pre-set. The smaller than sign
(<) indicates that the number currently present in the light
band (zero) is smaller than the pre-set value.
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No object
One object detected
Two objects detected
Three objects
detected
Four objects
detected
Five objects detected
Six objects detected
Seven or more
objects detected
4.5
Size restriction of measuring field (Blanking)
This can be used to restrict the size of the measuring field.
This way, obtrusive elements can be blanked. For both the
right and the left edge, an area with 0.1 mm increments
can be defined, which is ignored by the sensor. Blanking
OFF deactivates the function. The set values remain
stored. Blanking ON activates the function again.
The zero point for position measurements remains
unchanged. In other words, measurements are taken not
from the edge of the blanked area but rather from the edge
of the light band.
If the areas to be blanked overlap, the overlap area in the
center is blanked.
The size of the blanked area is also shown in the value
display.
Blanked areas
Fig. 4-13: Blanking active (left: Value display; right: Blanking setting)
4.6
Display options
Available options are SleepTime, Rotation and Contrast.
The display turns off after the time set under SleepTime.
Either 1 min, 5 min or 15 min can be selected. The factory
default setting is 15 min.
Pressing any key reactivates the display.
The menu item Rotation allow you to rotate the display by
180°.
The menu item Contrast is used for changing the contrast
and display brightness. Possible values: 0...23; factory
default setting: 16
4.7
Resetting to factory defaults
Two options are available, back to settings and RESET
settings.
RESET settings resets the sensor to its factory defaults.
NOTICE
This clears all settings including any taught objects and
the configuration for the analog outputs (voltage or
current output). The analog outputs become voltage
outputs after a reset. Before you reset, be sure that this
does not represent a hazard for the inputs of the PLC,
A-D card etc.
Back to settings or pressing the C key takes you back to
the higher menu level without resetting.
Blanked areas
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13
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