3-18
Setting the Threshold (Teach Function)
Mechanism of the Threshold Setting
The peak and bottom amounts of received light monitored during auto teach are extracted, and the threshold
is set to the median value.
Example) Through-beam fiber unit
If the highest amount of received light is 1000 and the lowest is 500, the threshold is set to the
median value, 750.
1000
750
500
Example) Diffuse reflective
If the highest amount of received light is 600 and the lowest is 100, the threshold is set to the
median value, 350.
600
350
100
Teach function ends.Teach function starts.
Received light amount
Peak level
Threshold
Bottom level
Teach function ends.
Teach function starts.
Received light amount
Peak level
Threshold
Bottom level
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