Balluff BLA 16C-002-00,25-S75, Руководство пользователя

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4
Parameterization and functions (continued)
Exemplary cases are presented below to explain the
modes:
4.2.1 One edge
To detect an edge brought into the measurement field from
the right side (right edge of the measurement field is
covered), set “Right Object” (RO) as the mode for an
analog output value. The distance of the edge from the
right border of the measurement field is displayed as the
measured value. If the distance needs to be measured
from the left field border, set “Left Slit” (LS).
Fig. 4-1: One edge in the light band
In this case no value is output for Left Object (LO) or Right
Slit (RS). Since there is only one edge, no value is output
for Slit or Diameter either.
If the light band is completely covered, the position of the
right and left edges is indicated with the maximum value
16256. In this case, the point "Invalid value" [Data Invalid]
is also set to "true" in the process data.
4.2.2 Diameter and position (two edges)
The object is completely within the measuring field, i.e. the
borders of the light band are not covered.
Fig. 4-2: One object (two edges) completely within the light band
If you want to output the center position and the diameter
simultaneously, select :
Analog output value 1 = Pos. obj. (PO) and
Analog output value 2 = diameter (D).
Alternatively, the position of both edges, for example, can
also be output:
Analog output value 1 = Left object and
Analog output value 2 = Right object.
4.2.3 Multiple objects
If there are several objects in the light band, the device
works in such a way that only the first object from the right
and from the left is detected. Objects in between are
ignored.
The output values are output as shown in figure 4-3 for
different modes in the case of several objects.
Fig. 4-3: Multiple objects in the light band
4.2.4 Averaging [Analog Value Average Counter]
The averaging function can be used to output the average
of an output value over several cycles. If the parameter is
set to n, the BLA calculates internally the arithmetic aver-
age over n cycles and outputs this average value. If the
parameter is set to 1 (or 0), averaging is deactivated and
the current value is output.
4.2.5 Scaling [Scale] and Offset [Offset]
The output values can be modified by means of the scaling
[Scale] and offset values. This is done according to:
Output value = original value x s offset
BLA 16C-002-00,25-S75
Balluff Light Array