SICK LMS500-20000 PRO Indoor, Руководство по эксплуатации

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Operating Instructions
LMS500 Product Family
Product description
8013796/UL20/2010-09-27
© SICK AG · Division Auto Ident · Germany · Subject to change without notice
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Chapter 3
3.8.1 Evaluation cases
An evaluation case defines which output field is evaluated in which way and on which output
it acts. You can configure up to ten evaluation cases, all configured evaluation cases are
active simultaneously.
For each evaluation case you configure in SOPAS ET:
•
inputs that activate an evaluation case, if necessary
•
the evaluation strategy
•
the evaluation field
•
the output on which the evaluation case acts
•
the response time of the output
P
ROJECT TREE
, LMS…, P
ARAMETER
, E
VALUATION CASES
.
Evaluation strategy
In SOPAS ET choose one of four possible evaluation strategies:
•
pixel evaluation
The LMS evaluates the entire area of the field, every single beam is considered in the
evaluation. If an object enters the field, this result is sent to the related output.
•
blanking
The LMS evaluates the entire area of the field. However, using blanking objects of a
specific size can be blanked. An object is only detected if it is larger than the blanking
configured.
•
contour
The LMS evaluates the presence of a contour that must be permanently and completely
in the evaluation field. As a result the LMS can detect, e.g., that a door is opening
outwards or that the position of the LMS is being changed. Also crawling beneath a
vertical evaluation field or the deflection of the laser beam by a mirror can be detected.
Using blanking the lack of part of a contour can be blanked up to a certain size.
•
I/O operator
Using the I/O operator evaluation strategy you can link the inputs of the LMS with its
outputs (see
section 3.9.4 “Logical operators for inputs and outputs” on page 35 ).
Response time
For the Pixel evaluation, Blanking and Contour evaluation strategies you must define a
response time. For the LMS to detect an object using the Pixel evaluation or Blanking
evaluation strategy, the object must be detected in one place for at least the duration of the
response time. For the Contour evaluation strategy the contour infringement must be
detected in one place for at least the duration of the response time.
Manipulation prevention
If pixel evaluation is configured, glare may result in it no longer being possible for the LMS
to monitor a field. If blanking is configured, small objects in the near range of the LMS can
cause large shadows.
If you use evaluation fields at a distance from the LMS, then the object or the object
erroneously measured due to glare is outside the evaluation field and will not be detected.