Fastus D4RF Series, Руководство пользователя

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Basic Usage
Frequently Used Functions
3-7-5 [S7] - [D2] Threshold Mode “Edge height”
Threshold mode of “Edge height” generates outputs when there are sudden changes in the received light
amount.
The operating principle is differentiation detection. The received light amount is monitored for the cycle set
with “Response time” (default value: 250 µs), and the sensor activates with the difference between the
received light amounts for the time set with Edge offset (default value: 1250 μs) and the present value.
This mode is applicable for detections such as when the difference in the received light amounts is minimal
when detecting small objects and there are slow changes in the received light amounts due to the
surrounding environment.
➀ ➁
ON
OFF
MEMO
When Threshold mode is set to “Standard”, output continues while the received light amount exceeds the threshold.
However, with the “Edge height” setting, output is only generated when the received light amount changes.
②
On when the received
light amount increases
① On when the received
light amount decreases
Time
Output
Received light
amount
[Detection of small objects
dropping]
[Detection of chips/cracks in
liquid crystal glass]
[Detection of transparent film
meandering]