Dynamic TEACH and Adaptive Thresholds

•

Teach on-the-fly

•

Sets a single switching threshold (switching point)

•

Threshold position is adjustable using “+” and “-” buttons (Manual

Adjust)

•

Recommended for applications where a machine or process may not

be stopped for teaching.

Dynamic TEACH is a variation of two-point TEACH. It programs the sensor

during actual machine run conditions, taking multiple samples of the light

and dark conditions and automatically setting the threshold at the optimum

level.

Dynamic TEACH activates the sensor’s adaptive threshold system, which

continuously tracks minimum and maximum signal levels, and automatically

maintains centering of the threshold 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.

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

adjusted by

Manual Adjust

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.

The sensing threshold 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).

Bar Graph LED (Following TEACH)

Relative Signal Difference/Recommendation

6 to 8

Excellent: Very stable operation.

4 to 5

Good: Minor 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 for more than 2

seconds

Hold the remote line low (to

ground) for more than 2

seconds

Power LED: OFF

Output LED: OFF

Bar graph: #7 and 8 flash

TEACH Sensing

Conditions

Continue to hold push button

(+) and present the Output ON

and OFF conditions

Continue to hold remote line

low (to ground) and present

the Output ON and OFF

conditions

Power LED: OFF

Output LED: OFF

Bar graph: #7 and 8 flash

Return to Run

Mode

Release push button (+)

Release the remote line/

switch

TEACH Accepted

Power LED: ON

Bar graph: 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

Bar graph: #1, 3 and 6, 8 flash to show failure

Sensor returns to RUN mode without changing

settings

WORLD-BEAM® QS30 Diffuse-Mode Laser Sensor

4

www.bannerengineering.com - Tel: +1-763-544-3164

P/N 109027 Rev. E