Entering Threshold Values - Omron L User Manual

Section 5
DETAILED SETTINGS

Entering Threshold Values

Threshold values are set to determine the range for PASS judgements. Both HIGH and LOW
threshold values are set. There are three judgement outputs: HIGH, PASS and LOW.
HIGH threshold
Measured value
LOW threshold
HIGH
PASS
Output
LOW
The following table outlines the three methods for setting the threshold values.
Method
Direct input
Position teaching
Two-point teaching
Automatic teaching
Hysteresis (hysteresis width) can also be set for threshold values. Set hysteresis when judgements are
unstable to prevent chattering.
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ON
OFF
ON
OFF
ON
OFF
The threshold values can be set by directly inputting the numeric values.
Direct input is useful when you know the dimensions for an OK judgement or when
you want to fine-tune threshold values after teaching.
Performs measurement and uses the measurement results to set threshold values.
Position teaching is useful when threshold samples, i.e., with the upper and lower
limits, can be obtained beforehand.
Sets the intermediate point between the first and second teaching points as the
threshold value.
Two-point teaching is useful to detect small surface steps on the sensing object.
Performs measurement continuously while the keys are held down and sets the
maximum and minimum measurements during that period as the threshold values.
Automatic teaching is useful when you want to set threshold values by starting the
device and obtaining real measurements.
(ON when Measurement result >
HIGH threshold )
(ON when LOW threshold ≤
Measurement result ≤ HIGH threshold)
(ON when Measurement result <
LOW threshold )
Details