Operating Instructions Chapter 3
C4000
Product description
8 009 221/16-11-00 © SICK AG • Safety Systems • Germany • All rights reserved 17
Properties of fixed blanking
· The C 4000 is capable of blanking a total of four areas simultaneously. A minimum of one
beam spacing must exist between two blanked areas.
· The first beam of the light curtain (close to the 7-segment display) must not be blanked.
It is needed for the synchronisation between sender and receiver.
· For vibrating objects, you can select a position tolerance of the area of a maximum of
±2 beams.
· In addition, you can define a size tolerance of –1 beam.
Notes
· If you configure a blanked area without position and without size tolerance, the move-
ment of the object within the area is very limited before the light curtain changes to red.
· The maximum selectable tolerance values depend on the size of the blanked area: The
actual tolerance expansion in millimetres differs. It depends on the physical resolution of
the device.
· With fixed blanking, the 7-segment display indicates r as soon as sender and receiver
are aligned.
n
Device symbol C 4000 receiver, context menu Configuration draft, Edit, file card Blanking
of the appropriate system, Type of blanking = fixed. With the help of selection fields, the
size of the area and the tolerance values (in millimetres) for size and position can be
selected.
3.4.6 Floating blanking
Fig. 9: Schematic layout
of the floating blanking
The light curtain C 4000 is capable of blanking an area of two or more adjacent beams ().
In contrast to fixed blanking, the blanked area is allowed to move (
) without the light cur-
tain changing to red.
The blanked area will no longer be part of the protective field. Moving objects must there-
fore be permanently within the protective field (
and ). As soon as the object is removed
from the protective field, the light curtain will send a signal to disrupt the dangerous move-
ment (
). Protection is otherwise no longer guaranteed.
Properties of floating blanking
· The C 4000 is capable of blanking a total of four areas simultaneously.
· Fixed and floating blanking can be mixed.
· The size of the movable area must be at least equal to the effective resolution (see page
19 if you use reduced resolution).
· Areas of floating blanking must not be allowed to make contact or overlap during opera-
tion. The CDS (Configuration & Diagnostic Software) will check this automatically.
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