Photoelectric
SU17 Series Fiber Optic
Photoelectric Sensors
753
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Germany: +49 621 776-4411
Fuchs Group
www.pepperl-fuchs.com
Subject to modifications without notice
Copyright Fuchs
SU17 Series Programming
Off-Delay Timer
The 40 ms Off-Delay timer can be activated or de-activated by simply pushing the
tuning button for at least 10 seconds while in the «RUN» mode. A small dot on the
digital display will show when the timer is activated. See figure at right.
Digital Display
Light reception level definition and the operation chart of output/LED indicators
Light
reception
level
Operating
level
Output
Output indicator
(red LED)
Stability indicator
(green LED)
Light reception level
(digital indicator)
Light on
Dark on
Light on
Dark on
Time
Stable light
The point of operation is always set between 4 and 5 of light reception level.
A is equal to twice the hysteresis automatically set during sensitivity adjustment.
Stable dark
Unstable dark
Unstable light
A
Margin Display
The digital display typically indicates the amount of light received. However, it can also show the contrast
margin if either of the following apply:
• The sensor is programmed for the distinction/contrast setting as shown on page 752.
•
Press the “tuning” button while the switch is in the run mode. If the sensor is programmed for positioning, the
display will show “-“. If the sensor is programmed for maximum sensitivity, the display will show “H“.
The contrast margin shows the difference of light received between the two targets. The higher the number,
the better the security. In the example of above, the top row (margin level indication) shows the number in the
display, while the bottom row indicates the actual security margin expressed as a multiple of the automatically
adjusted hysteresis.
Margin level indication
Secured margin level
≥
x1
≥
x1.2
≥
x1.5
≥
x2
≥
x3
≥
x4
≥
x5
≥
x6
≥
x7
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com
