A single sensing condition is presented, and the sensor positions a threshold a programmable % offset below the
presented condition. When a condition darker than the threshold is sensed, the output either turns ON or OFF, depending
on the LO/DO setting.
Threshold Position
Sensor positions
threshold a programmable
% offset below the
presented condition
Darkest
(no signal)
Most Light
(saturated
signal)
Output OFF
Output ON
Condition
Presented
Figure 4. Light SET (Light Operate shown)
Dynamic TEACH
•
Teaches on-the-fly
•
Establishes a single switching threshold
Dynamic TEACH is best used when a machine or process may not be stopped for teaching. The sensor learns during actual
sensing conditions, taking multiple samples of the light and dark conditions and automatically setting the threshold at the
optimum level.
Sensor positions
threshold midway
between taught conditions
Darkest
(no signal)
Most Light
(saturated
signal)
Output OFF
Output ON
Darkest Taught
Condition
Lightest Taught
Condition
Position
Figure 5. Dynamic TEACH (Light Operate shown)
The output ON and OFF conditions can be reversed using the LO/DO switch.
Troubleshooting
Percent Minimum Difference after TEACH
The Dynamic TEACH method will flash a % minimum difference on the displays after a PASS or FAIL.
Value
PASS/FAIL
Description
0 to 99%
FAIL
The difference of the taught conditions does not meet the required minimum
100 to 300%
PASS
The difference of the taught conditions just meets/exceeds the required minimum,
minor sensing variables may affect sensing reliability
300 to 600%
PASS
The difference of the taught conditions sufficiently exceeds the required minimum,
minor sensing variables will not affect sensing reliability
600% +
PASS
The difference of the taught conditions greatly exceeds the required minimum, very
stable operation
Percent Offset after SET
The Window and Light SET methods will flash a % offset on the displays after a PASS or FAIL.
DF-G2 High Speed Expert
™
Dual Display Small Object Counter
P/N 178061 Rev. E
www.bannerengineering.com - Tel: +1-763-544-3164
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