S7] Detection; [S7] - [D1] Hysteresis - Fastus D4RF Series User Manual

4-6 [S7] Detection

This function is used to configure advanced settings related to detection, such as making adjustments to the
reference for detection judgment, the output timing, the emitter power, and the sensitivity.

4-6-1 [S7] - [D1] Hysteresis

This function adjusts the received light amounts to turn the output on and off (it configures the margin
between these levels).
These received light amounts are referred to as shown below, and this margin in (gap between) the received
light amounts is referred to as hysteresis.
Example with Light On Operation
• Operation point: Received light amount that makes the output turn on, Threshold
• Reset point: Received light amount that makes the output turn off
Adjust the value of Hysteresis to set the margin in the received light amounts of the operation and reset
points.
For example, set a larger value to reduce detection instability caused by fluctuation of reflection from an
object and a smaller value to detect small height differences.
Stabilizing Object Detection Near the Threshold
The received light amounts frequently crossing the threshold causes unstable output. In this situation,
increasing the Hysteresis value lowers the light amount of the reset point to stabilize the output.
Example) Adjusting the Hysteresis setting from 5% to 20% (diffuse reflective)
Lowering the received light amount of the reset point makes the output more stable when there are
small changes of the received light amount.
Ramco Innovations
Reset point (off point)
Operation point
(on point)
Hysteresis (default value is set to -5% of the set threshold)
www.optex-ramco.com
[S7] Detection
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