Count Modes - Balluff Light Array BLA 50A-001-S115 Betriebsanleitung

BLA 50A-001-S115
Balluff Light Array
4
Operation and mode selection (cont.)
Automatically determining values:
After opening the Object screen the status of the first
–
object flashes.
1. Use the arrow keys to select T for Teach.
2. Position the object in the light band.
3. Confirm with OK.
– If the teach is successful, "+" as status and the taught
value are displayed. The object number at upper right
in the display changes from 7 (unknown object) to the
object number which was just taught. The value is
automatically stored.
– The cursor (flashing point) jumps to the second object.
4. Repeat the procedure until all desired objects have
been taught.
– Click on OK to skip an object.
– Use C to go back to the higher menu level (Digital
outputs).
Entering values manually:
1. Press OK repeatedly until the value to be set flashes.
The cursor position first goes through all six
status fields before it changes to the value of
the first object.
2. Use the arrow keys to set the value (in 0.1-mm
increments).
3. Confirm with OK.
– The status is automatically set to "+" (object number
used).
To deactivate an object, set the status to "–".
The teach value is no longer displayed but
remains stored internally.
The values are retained even after the device is
shut off or after signal normalizing (Device
settings → Normalize). They are only cleared
by Device settings → RESET settings.
The taught objects only apply to detection
modes, not count modes. However, taught
objects remain stored upon switching to a count
mode (Count Obj. or Count Slit) and remain
available unmodified after switching back to a
detection mode.
12 english
4.4.4

Count modes

Alternatively to object detection, the BLA can also
determine the number of objects that are simultaneously
present in the light band.
The digital outputs can be allocated in such a way that
either the determined number or the result of the
comparison with a pre-set nominal number is issued.
Either the number of objects (defined by their outer
diameter) or the slits (defined by their inner diameter/slit
width) can be determined in the light band. For this
purpose, use the menu option Digital Outputs, go to the
sub-item Object mode and select either Count Obj. or
Count Slit. The selected mode is displayed in the value
display under DO (Digital outputs) with either CO or CS.
Fig. 4-9: Setting example: In this setting, the number of objects with
a diameter of 3.0 ±0.5 mm is displayed. Objects beyond
the tolerance range are ignored.
Adjustable parameters are the object diameter or slit width
(Size) and the desired tolerance range.
In this case, only objects are counted that comply with the
set size requirements.
If all objects, regardless of their size, are to be displayed,
then Size and Tolerance are left empty (- -). In the value
display, this is indicated by "All" instead of a set numerical
value.
If "- -" is pre-set for all three parameters, Size,
Tolerance and Preset, then the number of
objects regardless of their size is displayed.
The values for Size and Tolerance in the count
mode must be set manually with the arrow
keys. They cannot be set automatically via
Object teach.
The values that are taught in under Object
teach are ignored in the count mode.
A set tolerance is also displayed in the value display.
Fig. 4-10: Value display: Setting example Count Objects (CO) with
count of the objects with a diameter of 3.0 mm ±0.5 mm.
In addition, a nominal number can be determined under
Preset.