Omron MS2800E, Руководство по эксплуатации

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30
Cross Talk Mitigation
Section 10-2
The interruption is not detected because of the reflection. Reflective surface
interference may also appear above and below the sensing field.
Worst case alignment example
This example shows the minimum distance from the reflective surface, d, to
one side of the beam center line
10-2 Cross Talk Mitigation
To mitigate interference from other light curtains, the MS2800 system has two
possible scan codes, A and B. The transmitter and receiver units must be set
to the same scan code for the receiver to enter the MACHINE RUN state.
Transmitter
Receiver
Approach direction
Central beam
Light beam interrupted
d
Reflective Surface
Perimeter of danger area
Reflection
Interruption
a
Beam Angle, a
Transmitter
Receiver
Approach direction
Central beam
Light beam interrupted
d
Reflective Surface
Perimeter of danger area
Reflection
Interruption
a
Beam Angle, a
0
0,2
0,4
0,6
0,8
1
1,2
1,4
1,6
1,8
2
0,1 0,2 0,5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Range [m]
M
in
im
u
m
D
ist
an
ce d
[
m
]
Scan Code A
Scan Code B