Wenglor SG4-I, Руководство по эксплуатации

Страница: 35 / 59

35
5.4.4 Reduced Resolution
Light curtain resolution can be reduced with the help of the reduced resolution function. As opposed to light curtains
with mechanically reduced resolution, electronically reduced resolution provides for significantly greater functional
reserves. This is due to the fact that objects which are smaller than the selected resolution do not cause the safety
output to switch where electronically reduced resolution is utilized.
The required resolution is configured by means of teach-in with the desired objects.
Resolution is set such that the objects can pass through the safety field at any point without causing the
safety output to switch. With the help of the table, the displayed value can be converted to the resulting reso-
lution in order to determine safety clearance.
5.4.4.1 Principle
RUN
STOP
Reduzierte
Auflösung
= 3 Strahlen
unterbrochen
weitere
Strahlen
unterbrochen
Reduzierte
Auflösung
= 3 Strahlen
unterbrochen
Reduced
Resolution
= 3 Interrupted
Beams
Reduced
Resolution
= 3 Interrupted
Beams
Additionally
interrupted beams
A certain number of adjacent beams can be interrupted with
reduced resolution without causing the safety output to switch
(see table). Light curtain resolution is thus changed.
In this way, objects which are smaller than the reduced resolu-
tion value can be passed through the safety field
If an object which is larger than the selected resolution passes
through the safety field (e.g. intrusion), the safety output is
switched!
Light curtain resolution is identical to electronically
reduced resolution in the “reduced resolution” op-
erating mode (see table).
Number of
muted beams
Resolution d
for SG4-14
(Finger
protection)
7 mm steps
Resolution d
for SG4-30
(Hand
protection)
17 mm steps
1 21 mm 47 mm
2 28 mm 64 mm
3 35 mm 81 mm
4 42 mm 98 mm
5 49 mm
6 56 mm
7 63 mm
8 70 mm
9 77 mm
10 84 mm
11 91 mm
12 98 mm
13 105 mm
The following points must be observed:
• Safety clearance is altered through the use of reduced
resolution, and must therefore be recalculated (section
5.4.4.3).
• The “restart inhibit” and “contactor monitoring” functions can
be activated as required in the reduced resolution operating
mode.