ONLINE HELP SOPAS Chapter 5
LECTOR®620
Parameters
8013778/Y269/2013-11-27 © SICK AG · Germany · All rights reserved · Subject to change without notice 35
5.4.1.6.1 Setting image frequency manually
If the Setting image frequency manually parameter is activated, the image frequency can
by specified by the user. If this parameter is deactivated, the reading device operates at ma-
ximum image frequency. The R
EQUEST button can be used to retrieve the current image fre-
quency of a connected device. There may be a deviation between the set image frequency
and the actual image frequency used by the reading device. The device adjusts the image
frequency to other settings such as the exposure time. A long exposure time significantly re-
duces the image frequency.
It makes sense to reduce the image frequency for slow applications in which the object con-
taining the code moves past the reading device slowly. Reducing the image frequency in-
creases the time for evaluating individual images. This results in increased reading
reliability for each individual image. Reduced image frequency is not suitable for fast appli-
cations, as you run the risk of not detecting the code on any image.
5.4.1.6.2 Image frequency input field
The required image frequency can be entered into the input field in Hz, number of images
/ s. A message appears if invalid values are entered.
5.4.1.6.3 Image rotation 180°
If the Image rotation 180° parameter is activated, the image is recorded rotated around
180°.
As the image is processed from the top down, codes in the top part of the image are identi-
fied earlier. By rotating the image around 180°, you can therefore reduce the evaluation
time for codes that are not positioned centrally. This is particularly true for readings at a
standstill.
5.4.1.6.4 Image region of interest
You can use the Image region of interest parameter to concentrate the reading area on the
required region.
A reduction in the reading area reduces the evaluation time and increases the frame rate.
This enables you to achieve higher object speeds.
To change the size of the reading area, you drag and drop the red marking or enter the
four percentage values.
5.4.2 Object trigger control
The Object trigger control tab contains the parameters for opening and closing the reading
gate.
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