Setting Threshold Values - Omron ZS-L User Manual

Setting Threshold Values

Threshold values are set to determine the range for PASS judgments. Both HIGH and
LOW threshold values are set. There are three judgment outputs: HIGH, PASS and LOW.
HIGH threshold value
Measured value
LOW threshold value
ON
HIGH
OFF
Out-
ON
PASS
put
OFF
ON
LOW
OFF
• Hysteresis (hysteresis width) can also be set to threshold values. Set hysteresis when judgments are
unstable to prevent chattering.
Setting Judgment Output p.4-5
• When setting threshold values while still connected to an external device, set the Sensor Controller's
LD-OFF input to ON so that the output to the external device remains unchanged. Judgment outputs in
the TEACH mode are the same as in the RUN mode, i.e., HIGH, PASS, and LOW.
Before executing teaching, select which of the HIGH or LOW threshold values is to be set
on the threshold switch on the ZS-L Series Controllers.
TEACH Mode
Method
TEACHING Performs measurement and uses the measurement results to set threshold values.
(MENU key) Teaching is useful when threshold samples, i.e., with the upper and lower limits, can be
obtained beforehand.
Hold, trigger, and scaling settings that have been made before teaching are reflected in
the teaching measurements.
DIRECT IN The threshold values can be set by directly inputting numerical values. Direct input is
(L/R/UP/DOWN keys) useful when you know the dimensions for an OK judgment or when you want to fine-
tune threshold values after teaching.
Sensor Head
Teaching point =
LOW threshold
value
Threshold sample (upper limit)
Setting Threshold Values
(ON when Measurement result
> HIGH threshold value)
(ON when LOW threshold value
≤ Measurement result
≤ HIGH threshold value)
(ON when Measurement result
< LOW threshold value)
Details
Sensor Head
Teaching point =
HIGH threshold
value
Threshold sample (lower limit)
Section 3
ZS-L
3-31
User's Manual