Operating instructions
Operating Instructions Chapter 4
C4000 Standard/Advanced
8009861/WA65/2012-06-12 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 31
Subject to change without notice
Configurable functions
4.8.2 Floating blanking
The C4000 Advanced safety light curtain 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 safety light curtain changing to red. The safety light curtain detects
whether the object is in the blanked area or not (, so-called Object monitoring, see below
in chapter).
You cannot combine the function Floating blanking with partial object monitoring with
the function Reduced resolution (see page 36).
For each floating area with complete object monitoring you must choose a size
tolerance of –1 or –2 beams, i.e. the blanked object is allowed to be a maximum total
of 1 beam or 2 beams smaller.
Depending on the size tolerance configured, the effective resolution reduces at the
edges of the blanked area as per Tab. 11. For this reason the moving area must always
be greater than the effective resolution at the edges of the area.
The size of the blanked area for floating blanking with complete object monitoring must
be at least equal to the effective resolution.
The size tolerance of –2 beams can be used only in devices with a physical resolution of
14 mm and 20 mm.
Device symbol C4000 Host (receiver), context menu Configuration draft, Edit, file card
Blanking of the related system, option Type of blanking = floating (full) or floating
(partial). With the help of the selection fields, the size of the area can be selected directly
(in millimetres).
Fig.
16
:
Schematic layout of
the floating blanking
Notes