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Table 3: Expected TEACH Behavior for Two-Point Static TEACH
Condition
At least one taught condition is
between the minimum and maximum
signal level limits.
Both taught conditions are darker than
the minimum signal value limit.
Both taught conditions are brighter
than the maximum signal value limit.
Both taught conditions are at the same
signal level. This is a Calibration Set.
3.5.3 Dynamic TEACH
Dynamic TEACH sets a single switching threshold during machine run conditions. Dynamic TEACH is recommended for
applications where a machine or process may not be stopped for teaching. During Dynamic TEACH, the sensor takes
multiple samples of the light and dark conditions and automatically sets the switch point at the optimum level.
NOTE: The sensor must be set to
NOTE: To program the sensor using remote input, remote input must be enabled (
1. Present the target.
Method
Action
Push Button
Present the first target. The sensor-to-target distance must be within
the sensor's range.
Remote Input
2. Start the TEACH mode.
Method
Action
Push Button
Press and hold TEACH for longer than 2 seconds.
Remote Input No action required.
3. Teach the sensor.
TEACH Result
Sets the threshold between the two
taught conditions.
Sets the threshold at the minimum
level. Sets the sensor at the maximum
detection condition.
Sets the threshold at the maximum
level. Sets the sensor at the minimum
detection condition.
Sets the threshold slightly below the
two taught conditions.
Darkest Taught
Condition
Sensor positions
threshold midway
between taught conditions
Output OFF
Darkest
Position
(no signal)
adjusted by
Manual Adjust
Figure 8. Dynamic TEACH (Light Operate shown)
=
to use the following instructions.
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Display
The current NSS displays.
briefly displays, and then the
current NSS displays.
briefly displays, and then the
current NSS displays.
briefly displays, and then the
current NSS displays.
Lightest Taught
Condition
Output ON
Most Light
(saturated
signal)
Result
The target's value displays.
Result
on the display. The DYN indicator
flashes.
n/a
Q3X Laser Contrast Sensor
=
)
and
flash alternately
17
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