D10
Expert™ Discrete Output with Bargraph Display
Dynamic TEACH and Adaptive Thresholds
• Teach on-the-fly
• Establishes a single switching threshold
• Threshold position is adjustable using “+” and “-” buttons (Manual Adjust)
Dynamic TEACH is best used when a machine or process may not be stopped for
teaching. It programs the sensor during actual sensing conditions, taking multiple
samples of the light and dark conditions and automatically setting the threshold at the
optimum level (see Figure 3).
Dynamic TEACH activates the sensor’s adaptive threshold system, which continuously
tracks minimum and maximum signal levels, and automatically maintains centering of
the switchpoint between the light and dark conditions. The adaptive threshold system
remains in effect during RUN mode. The adaptive routine saves to non-volatile memory
at least once per hour.
When Dynamic TEACH mode is used, the output ON state (Light or Dark Operate) will
remain as it was last programmed. To change the output ON state, use SETUP mode
(see page 8).
Dynamic TEACH and Manual Adjust
The switchpoint may be adjusted (fine-tuned) whenever the sensor is in RUN mode
by clicking the “+” and “-” buttons. However, when a manual adjustment is made, the
adaptive threshold system is disabled (cancelled).
Sensor positions
threshold midway
between taught conditions
Sensor positions
threshold midway
between taught conditions
Darkest
(no signal)
Darkest
(no signal)
Most Light
(saturated
signal)
Most Light
(saturated
signal)
Single
sensing
condition
Sensing window size
adjusted by
Manual Adjust
Output OFF
Output OFF
Output OFF
Output ON
Output ON
Darkest Taught
Condition
Lightest Taught
Condition
Position
adjusted by
Manual Adjust
Darkest
(no signal)
Most Light
(saturated
signal)
Output OFF
Output ON
2nd Taught
Condition
1st Taught
Condition
Position
adjusted by
Manual Adjust
Figure 3. Dynamic TEACH (Light Operate
shown)
Bargraph
LED
Following
TEACH
Relative Signal Difference/
Recommendation
6 to 8
Excellent:
Very stable operation.
4 to 5
Good:
Minor sensing variables will
not affect sensing reliability.
2 to 3
Low:
Minor sensing variables may
affect sensing reliability.
1
Unreliable: Consider an alternate
sensing scheme.
Push Button
Remote Line
Result
Access
Dynamic
TEACH
Mode
• Press and Hold Dynamic
push button > 2 seconds.
• Hold remote line
low (to ground)
> 2 seconds.
Power LED: OFF
Output LED: OFF
Bargraph: LO & DO alternately flashing
TEACH
Sensing
Conditions
• Continue to hold push button.
• Present Output ON and OFF
conditions.
• Continue to hold remote
line low (to ground).
• Present Output ON and
OFF conditions.
Power LED: OFF
Output LED: OFF
Bargraph: LO & DO alternately flashing
Return
to
Run
Mode
• Release push button.
• Release remote line/
switch.
TEACH Accepted
Power LED: ON
Bargraph: One LED flashes to show
relative contrast (good signal
difference shown; see table
above)
Sensor returns to Run mode with new settings.
TEACH Unacceptable
Power LED: OFF
Bargraph: #1, 3, 5, 7 alternately flash
to show failure
Sensor returns to Run mode without changing settings.
or
or
T
T T T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T T T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T T T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
dynamic
static
8
4
6
5
3
2
1
7
DO
LO
HS
dynamic
static
8
4
6
5
3
2
1
7
DO
LO
HS
dynamic
static
8
4
6
5
3
2
1
7
DO
LO
HS
dynamic
static
8
4
6
5
3
2
1
7
DO
LO
HS
or
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