Fastus D4RF Series, Руководство пользователя

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Basic Usage
Setting the Threshold (Teach Function)
„
Mechanism of the Threshold Setting
The threshold is set to the value obtained by subtracting the specified percentage from the received light
amount during execution of the teach function (with no object present).
Setting the percentage used as a margin to the threshold to a smaller value allows for detection of highly
transparent objects and small objects. Setting the percentage to a larger value reduces the effect of
vibrations, etc.
Example) When the received light amount during execution of the teach function is 1000 and the detection
margin is 10%
The threshold is set to 900, obtained by subtracting the detection margin of 10% from the received
light amount of 1000.
0
900
1000
* Due to the addition of a hysteresis value with detection margin, actual threshold differs slightly from this
example.
3-4-7 1-point Zone
The upper and lower limits of the threshold are set with the percentage (default value: 10%) in relation to the
received light amount obtained with a single teach action.
The thresholds can be set to a fixed range of received light amounts, so this method can be used in judging
whether the object distance, position, and dimensions are within the set range.
Setup for 1-point Zone teach
Through-beam/
retro-reflective
Diffuse reflective Object
✓ (some
limitations)
✓
Required
„
Operation Procedure
* To cancel the setting of the teach function, press the
TEACH
ESC
key.
* To select the channel to teach (output 1 or output 2) in advance, hold down the
MENU
OK
key for 1 second or
more.
Level of transparency: low, dimensions: large
Received light amount
Received light amount when
the teach function is executed
Threshold (10%: default value)
[Characteristics of detectable objects]
Level of transparency: high, dimensions: small
Example with a screen fiber unit
[Through-beam] [Diffuse reflective]