The
near limit
and
far limit
parameters are device-dependent and are set to the physical
limit in the factory settings. The functionality and linear behavior are available in the
valid measuring range of 200 to 1,000 mm.
8.3.1.2
Edge height change
The edge height change function supplies a switching signal at the set device output as
soon as there is a change in value between two measured values. A typical application
for this function is counting shingles in printing applications. The device takes on the
complex evaluation tasks carried out by the control system.
To use the edge height change function, configure the following settings on the device:
•
Select the function on the digital output,
see "Edge height change", page 45
•
Set a fixed cycle time (recommended),
•
Set the minimum and maximum height change,
•
Set the hysteresis (if necessary),
see "Edge height change", page 31
•
Set the change direction (if necessary),
see "Edge height change", page 31
•
Set the cycle offset (if necessary),
Min. / max. height change
The
min. height change
and
max. height change
values define the smallest and largest dif‐
ference in mm. The two measured values must differ by this amount for there to be an
edge height change. The function only takes into account the difference between two
measured values and is independent of the absolute distance of the object.
>
Measurement
>
>
Application settings
>
>
Edge height change
>
>
Min. height change
>
>
Measurement
>
>
Application settings
>
>
Edge height change
>
>
Max. height change
>
Parameter
Factory setting
Min. height change:
-9,999.9 mm ... +9,999.9 mm
10 mm
Max. height change:
-9,999.9 mm ... +9,999.9 mm
100 mm
Hysteresis
Hysteresis is the difference in distance between the switch-on and switch-off points.
The hysteresis is necessary to ensure stable switching when the measured distance
fluctuates around the switching point that has been set. Hysteresis can be configured
OPERATION VIA DISPLAY
8
8019642/18JN/2020-07-01 | SICK
O P E R A T I N G I N S T R U C T I O N S | OD1000
31
Subject to change without notice
