Balluff IO-Link BLA D Series, Руководство пользователя

Страница: 36 / 48

12 english
4
Parameterization and functions (continued)
Object number 7 is always output for unknown objects. If
there is no object in the light array, the object output value
is 0.
If an object located in the light path cannot be
unambiguously associated with a taught num-
ber (distance of the values for two or more
taught objects less than the set tolerance), the
smallest appropriate object number is output.
To deactivate an object, its value and tolerance
must be set to 0.
The values are retained even after the device
has been switched off or after signal normaliza-
tion. They are only deleted when the BLA is
reset to factory default settings.
In the standard version, the numbers of the detected objects
are output via the digital outputs. This is done according to
the binary coding in Tab. 4-3.
Decimal Out 3 Out 2 Out1 Meaning
0 0 0 0 No object
1 0 0 1 Object 1 detected
2 0 1 0 Object 2 detected
3 0 1 1 Object 3 detected
4 1 0 0 Object 4 detected
5 1 0 1 Object 5 detected
6 1 1 0 Object 6 detected
7 1 1 1 Unknown object
Tab. 4-3: Coding of the digital outputs
4.3.2 Count modes
As an extension of object detection, the BLA can also deter-
mine the number of objects currently in the light band. This
function is activated by selecting the "Count objects" or
"Count slits" options as parameter for the digital output
mode.
Either the number of objects (defined by their outer diame-
ter) or the number of slits (defined by their inner diameter/slit
width) can be determined in the light band.
Adjustable parameters are the object diameter or slit width
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,
both parameters should be set to 0.
The output is done via the object output value as in the
detecting modes.
The values that are taught in under object teach
are ignored in the count mode.
4.3.3 Any object
With this setting, the device checks whether there is an
object in the light band. Position, shape and size are not
taken into account. Therefore no further parameterization
is necessary. If there is an object in the light band, the
output is set at the value 7 for an unknown object.
This setting thus corresponds to the functionality of the
object display LED.
Objects in the blanking and autoblanking area are exclu-
ded from detection as before.
4.4 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. The parame-
ters "blanking left" and "blanking right" can be used to inde-
pendently define an area for the right and left edge of the
light band which is ignored by the sensor.
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.
4.5 System commands
Several system functions are available:
4.5.1 Signal normalizing and autoblanking
The function was explained in chapter 3.6.
4.5.2 Resetting the device (only with IO-Link)
Restarts the device. All stored settings are retained.
4.5.3 Restarting the measuring function (only with
IO-Link)
The measuring functions of the device are restarted, the
device itself, as well as its output functions and IO-Link, if
available, remain active. All stored settings remain active.
4.5.4 Restoring the factory defaults
All parameters are reset to their default values (see tab. 6-5).
BLA Series D
Balluff Light Array