Operating Instructions
Chapter
3
C 4000
18
©
SICK AG • Safety Systems • Germany • All rights reserved
8 009 221/16-11-00
Product description
·
The first beam of the light curtain (close to the 7-segment display) cannot be blanked. It
is needed for the synchronisation between sender and receiver.
·
Size tolerances of 1 or 2 beams may be selected for moving areas. In case of 2 beams
(increased size tolerance), the effective resolution at the edges of the moving area will be
reduced! For this reason the moving area must always be greater than the effective res-
olution at the edges of the area (see table 3).
·
The size tolerance of 2 beams can be used only in devices with a physical resolution of
14 mm and 20 mm.
WARNING
Check the safety distance S!
In case of floating blanking
and
increased size tolerance (2 beams), the required safety dis-
tance S will depend on the
effective
resolution.
>
If required, recalculate the safety distance and readjust it on the machine.
Example: – Physical resolution 14 mm
– Increased size tolerance (2 beams)
– Effective resolution 22 mm
Calculate the safety distance with a resolution of 22 mm.
>
Mark the effective resolution on the notice label of sender and receiver.
Fig. 10: Marking the effective
resolution on the device label
Note
With floating 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
= floating. With the help of the selection fields,
the size of the area can be selected (in millimetres).
Physical resolution
Size
tolerance
Effective resolution at the edges
of the area with floating blanking
14 mm
1 beam
14 mm
2 beams
22 mm
20 mm
1 beam
20 mm
2 beams
30 mm
30 mm
1 beam
30 mm
2 beams
Not possible
40 mm
1 beam
40 mm
2 beams
Not possible
Tab. 3: Effective resolution in
floating blanking with size
tolerance
