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.

P/N 178061 Rev. E

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