Low-Contrast SET - Model QS30LLPC
Darkest
(no signal)
Most Light
(saturated
signal)
Output ON
Output OFF
Location of switchpoint
adjusted via Manual Adjust
Sensor
Switchpoint
Learned
Signal from
Retro Target
35% of
Learned Signal
(+) (-)
Figure 4. Low-Contrast SET (Dark Operate shown)
• Sets a switchpoint at 35 percent below the signal from the retroreflector.
• Useful for small object detection and other applications with small varia-
tions in contrast, such as yarn- or thread-break applications.
• Sensor must be aimed at the reflector during the SET process. All condi-
tions darker than the switchpoint condition result in ON output (Dark Oper-
ate). Output ON and OFF conditions can be reversed by changing Light/
Dark Operate in SETUP mode (factory setting: Dark Operate).
Manual Adjust – Low-Contrast SET
During RUN mode, adjusts switchpoint up or down via “+” or “–” push buttons.
• Each push button “click” adjusts the switchpoint up by 5 percent of the
signal from the reflector or down by the same increments.
• The lighted bargraph LEDs move to reflect the increase or decrease in ex-
cess gain.
• LEDs #7 and 8 flash when maximum gain is achieved; LEDs #1 and 2
flash when minimum gain is achieved.
If the target object does not cause the output to change state, press the “–”
button to decrease the gain, making the sensor more sensitive to small signal
changes.
Push Button
Remote
(0.04 seconds < T < 0.8 seconds)
Indicators
Set
Switchpoint
• Align sensor to reflector
• Press and hold "+" > 2
seconds
• Align sensor to reflector
• Single-pulse remote line.
T
Green Power LED: OFF Yellow Output LED: ON
1
1
3
3
4
4
5
5
6
6
7
7
8
8
2
2
LO
LO
DO
DO
+
GAIN
—
Indicators
Sensor
Feedback
Switchpoint Accepted
Bargraph: #7 and 8 flash for 2 sec
Yellow Power LED: OFF
Green Power LED: ON
Bargraph: Appropriate LED ON
• Sensor returns to RUN mode with new settings.
• Use Manual Adjust to increase or decrease sensor
sensitivity.
1
1
3
3
4
4
5
5
6
6
7
7
8
8
2
2
LO
LO
DO
DO
+
—
GAIN
Switchpoint Unacceptable
Bargraph: #1, 4, 5, and 8 flash for 2 sec
Green Power LED: ON
• Sensor returns to RUN mode without saving (maintains
previous settings)
1
1
3
3
4
4
5
5
6
6
7
7
8
8
2
2
LO
LO
DO
DO
+
—
GAIN
WORLD-BEAM QS30 LLP and LLPC
P/N 112355 Rev. C
www.bannerengineering.com - tel: 763-544-3164
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