4. General functions
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i. -|Transparent setting guide|-
4.3
Alarm for incident light level
The received signal is divided into three areas (stable light ON, unstable light ON, and stable light OFF) based on the light
incident level as follows. The light incident level determines either OSSD output is ON or OFF and the OSSD indicators display
the condition. And 7-segment indicator displays the level of the lowest light receiving beam (0 to 9 levels).
The amount of received light may decrease due to the product distortion or long-term use.
If the amount of received light, even one beam, decreases less than from 15 to 35% and lasts for more than 30 minutes, the
alarm for the sensitivity reduction occurs.
Set the output mode of auxiliary output or lamp output to “sensitivity reduction.”
For more information on the auxiliary output, see
"6.5 Auxiliary output (AUX 1/2)"
For more information on error and warnings, see
30min
Sensitivity
reduction
level
OSSD ON level
OSSD OFF level
Stable light ON
Unstable light ON
Stable light OFF
OSSD
Auxiliary output
[Output phase:
reverse]
Auxiliary output
[Output mode:
sensitivity reduction]
ON
OFF
ON
OFF
ON
OFF
150%
35%
30%
15%
0%
For the sensitivity level based on the incident light level, see the table below.
Sensitivity level Incident light level(%)
0
0
1
15 to 30
2
30 to 45
3
45 to 60
4
60 to 75
5
75 to 90
6
90 to 105
7
105 to 121
8
121 to 135
9
135 to 150
