97
ZX-E
Operation Manual
Section 5 Entering Threshold Values
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.
The following table outlines the three methods for setting the threshold values.
Hysteresis (hysteresis width) can also be set for threshold values. Set hysteresis when judgements are
unstable to prevent chattering.
p. 102
When making settings while still connected to an external device, set the Amplifier Unit judgement’s output
hold input to ON so that the output to the external device remains unchanged. The judgement outputs in T
mode will be the same as in RUN mode, i.e., HIGH, PASS, and LOW.
Method Details
Direct input Sets threshold values by direct numerical value input.
Direct input is useful when you know the dimensions for an OK judgement or when
you want to fine-tune threshold values after teaching.
Position 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.
Automatic teaching 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 measured value <
LOW threshold value)
HIGH threshold value
Measured value
LOW threshold value
Output
(ON when measured value >
HIGH threshold value)
(ON when LOW threshold value ≤
Measured value ≤ HIGH threshold
Z166-E1-02A.book Page 97 Friday, June 3, 2005 4:18 PM
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