SICK LD-MRS400001, Руководство по эксплуатации

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Operating Instructions Chapter 3
LD-MRS
Product description
8012948/ZMQ0/2017-06-09
© SICK AG · Germany · All rights reserved · Subject to change without notice
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Response time
A response time is defined for the above evaluation strategies. In order for the LD-MRS to
identify an object, it must be detected at one location for the duration of the response time
when the "pixel evaluation" and "hiding" evaluation strategies are used. With the "contour"
evaluation strategy, the contour violation must be detected for at least the duration of the
response time at one location.
Manipulation projection
When evaluation fields are defined at a distance from the LD-MRS, a small, close-range ob-
ject (between the LD-MRS in the field) may cast a large shadow in the observed fields. With-
out manipulation protection, shadowed objects are not detected in the field. When
manipulation protection is activated, the LD-MRS signals a field violation when the shad-
owed area is larger than the configured minimum object size, and the configured "expanded
response time" has passed.
Evaluation field
A field is selected from the configuration evaluation fields for the evaluation instance. Is
shape must corresponds to the evaluation strategy (see
Chapter 3.8.2 Evaluation fields,
Page 50 ).
Logical output
One of the logical outputs is selected for the evaluation instance. If several evaluation in-
stances act on one logical output, specify how the results of the evaluation instances are
linked (see
Chapter 3.8.3 Linking the evaluation instances to the logical output, Page 50 ).
Negation of the results
By negating the results, the field evaluation is conversely transmitted to the logical output.
The output that is used is hence switched (for example) when the evaluation field is free, or
when the contour has not been violated.
Important The "Negation of the results" function does not correspond to the setting option "active
high/active low" (level) for the external, physical outputs (see
Chapter 3.8.3 Linking the
evaluation instances to the logical output, Page 50 ).
Fig. 3-31: Manipulation protection against shadow
Evaluation field at a distance to the LD-MRS
Shadow
Object is
smaller
than the
minimum