Banner EZ-SCREEN­ Safety Light Curtain Systems - Manual (Page 34)

32
P/N 133487
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Overview
32
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
EZ-SCREEN
Instruction Manual
Installation and Alignment
3.4.2 Reduced Resolution (Floating Blanking)
Reduced Resolution allows objects of a certain maximum size to
interrupt the defined area without causing a Trip condition (i.e.,
the OSSDs turn OFF). Use Reduced Resolution only when
necessary. In Reduced Resolution applications, the separation
distance always increases due to the larger depth penetration
factor (Dpf). In either case see Section 3.1.1 to determine
separation distance.
With 2-beam Reduced Resolution enabled, any two
consecutive beams, (except for the sync beam), can be
blocked without causing a stop condition. Thus, multiple “holes”
are created in which 14 mm systems will “see” a 30 mm object
and ignore an 8.5 mm object. Similarily, 30 mm systems will
“see” a 60 mm object and ignore a 17 mm object. See Figure
4-1 for DIP-switch configuration. During operation, the Status
indicator flashes Green when Reduced Resolution is enabled.
Figure 3-12. Corner mirror alignment
Figure 3-13. Optical alignment using the LAT-1
Model
Reduced
Resolution
Setting
Maximum Size
of Undetected
Objects
Resulting
Resolution
14 mm
Resolution
OFF (Not applicable) 14 mm (0.55")
ON (2-beam) 8.5 mm (0.34") 30 mm (1.18")
30 mm
Resolution
OFF (Not applicable) 30 mm (1.18")
ON (2-beam) 17 mm (0.67") 60 mm (2.36")
3.4.3 Fixed Blanking
One or multiple areas within an EZ-SCREEN sensor pair may
be blanked out. The minimum number of beams between two
blanked areas is one. Any beam other than the sync beam may
be blanked. All beams of a fixed blanked area must stay blocked
at all times (after the fixed blanking configuration mode has been
exited), in order for the OSSDs to stay ON.
Fixed Blanking Configuration Procedure
1. From normal operation or a power OFF condition, move the
second and third DIP switches (the first RR and T/L) both to
the left (T and RR position). See Figure 3-14.
2. Move the fourth and fifth DIP switches (the second RR and
T/L) both to the right (L and OFF position).
3. The receiver should now either be in a lockout condition or
power is still OFF.
4. If power is OFF: Apply power
Lockout condition: Perform a valid reset sequence (close
the reset switch for 0.25 to 2 seconds, then reopen the
switch).
5. Fixed Blanking configuration indicated by:
• Display alternates between “PFA” and the number of
blocked beams (“0” if all beams are clear).
(PFA = Program Fixed Blanking Active)
• Zone indicators active
• Yellow Reset indicator OFF
• Status indicator ON Red
6. Position object(s) to be blanked.
7. When beams are blocked, the 7-segment display alternates
between “PFA” and the number of blocked beams. The
zone indicators remain active and denote the location of
blocked beams.
WARNING . . .
Use of Reduced Resolution
and Fixed Blanking
Use Reduced Resolution and Fixed Blanking only when
necessary. Any holes created in the defined area either must be
completely filled by the blanked object or the separation distance
must be increased to account for the larger resolution (see Section
3.1.1).
Component #4
(Receiver)
Component #1
(Emitter)
Component #2
(Mirror)
Component #3
(Mirror)