Interface A2, Release Date: 02.03.2022
Page 18
LVMC User Manul A2 - 499.027.82
OPTRONIC AG
SWITZERLAND
Unteregger Strasse 53
CH-9403 Goldach
Phone: +41 (0)71 844 02 00
Fax:
+41 (0)71 844 02 10
e-mail: [email protected]
web: www.optronic.ch
4.6
Maximum Permissible Passing Time / Stuck Objects
If an object remains for longer than the predefined maximum allowed passing time in the sensing area, the
LVMC evaluates this as a stuck object. If this occurs, the LVMC leaves the operating mode "running", gener-
ates an entry in the error memory (error message “Maximum permissible passing time overrun: Object stuck?
- LVMC waits until object is removed”) and waits until the object leaves the sensing area or has been re-
moved from the sensing area. It then automatically switches back to the “running” operating mode.
4.7
Minimum Required Object Size
The minimum required object size is the minimum object size to be detected by the LVMC. The value must
be equal to or greater than the size resolution of the LVMC. The size resolution is the minimum object size
that the light curtain can detect. The entered minimum required object size directly affects all functions of
the LVMC. It may be useful to increase it if you want to permanently fade out interfering objects. If, for exam-
ple, a conveyor belt is guided through the light curtain and the conveyor belt is not sufficiently flat, the mov-
ing belt may be detected under certain circumstances and may lead to a considerable number of disturbing
object detections. In this case, increase the minimum required object size until the conveyor belt no longer
leads to unwanted detections.
4.8
Sensing Area Static Coverage
Smaller objects (conveyors, machine parts, etc.) that are permanently in the sensing area can be hidden by
specifying a statically covered area in the configuration. Enter the length of the statically covered area in mm.
4.9
Manual Calibration of the Sensing Area
The sensing area is not completely homogeneous. Therefore, the measured size of an object depends on
where it penetrates the sensing area. If a very exact measurement is required and it can be guaranteed that
an object always passes through the sensing area in a defined (small) zone, then the measured size can be
automatically corrected by a pre-definable calibration factor in percent.
A further application is the blanking out of translucent handling devices located in the sensing area. An ex-
ample of this is an acrylic plastic tube, which leads statically through the sensing area and in the interior of
which the objects pass the light curtain. The tube absorbs part of the light and, as a result, the light curtain no
longer correctly detects the size of the objects. The measured size can be corrected again using the provided
calibration factor.