Operation within the limiting range requires the following conditions:
•
Cle
an ambient condit
ions
•
Front screens are cleaned regularly
•
Regular teach-in
3.5 Scan time
In the MLG-2, not all light beams are active at the same time, instead one light beam is
ac
t
ivated after the other starting from the bottom.
Figure 7: Standard scan method
The sc
an time increases according to the number of beams of an MLG-2.
Figure 8: Scan time in relation to the number of beams
The sc
an time is used to determine the response times of the outputs, the minimum
presence time of an object and the repeat accuracy of a measurement result (repro‐
ducibility).
•
The response time is the time it takes for an output to react following the detec‐
tion of an object/gap. The maximum response time is 3 × the scan time plus the
transmission time to the outputs.
•
The minimum presence time is the time an object or a gap has to be in the detec‐
tion area for it to be detected. The minimum presence time is max. 2 × the scan
time.
•
The repeat accuracy of a measurement result (reproducibility) is the amount of
time by which an object detection can differ from a previous or subsequent detec‐
tion. The reproducibility time is 1 × the scan time.
3 PRODUCT DESCRIPTION
18
O P E R A T I N G I N S T R U C T I O N S | MLG-2 Prime 8018715.16YM / 2020-02-13 | SICK
Subject to change without notice
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