Keyence FS-N10 Series User Manual Page 100

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6
Appendix
6-2
- Digital Fiber Sensor FS-N10 Series User's Manual -
6-1
Troubleshooting
Frequently Asked Questions
Category Trouble Cause Action
Received light
intensity display
The received light intensity is incon-
sistent. How can it be stabilized?
It may be affected by vibration, ther-
mal characteristics caused by ther-
mal changes, or the state of the
workpiece surface, etc.
•Review the installation environment.
The received light intensity can be stably dis-
played at 100.0 by using the preset function.
"Preset Function" (page 3-6)
When using the DATUM1/2 mode, the set value
and received light intensity are both calibrated to
maintain a set ratio.
"Detection Mode" (page 4-8)
The received light intensity is too
low. How can it be increased?
This may be the result of a long
detection distance. When using the
reflective model, the intensity of the
light reflected from the workpiece
may be low, or there may be con-
tamination. When using t
he thru-
beam model or retro-reflective
model, the beam axis may be devi-
ated, etc.
•Review the installation environment and detec-
tion distance.
The received light intensity value can be
increased by raising (delaying) the power mode.
"Power Modes" (page 4-4)
The apparent received light intensity can be
increased 4-fold by using the light intensity
expansion setting.
"Display Gain" (page 4-32)
The received light intensity remains
unchanged from 4095 or 9999 even
if a workpiece is placed for detec-
tion.
The received light intensity has
become too large.
Extend the detection range.
•Lower the light emission level and the received
light intensity.
"Light emission/Received light intensity
adjustment (Saturation Canceling)" (page 3-18)
"Adjusting Light Emission/Received Light
Intensity (Attenuation)" (page 4-20)
When used un
der extremely short
conditions of the detec
tion range,
the received light intensity
decreases.
Screen
display
Nothing is displayed.
Eco (ALL) mode is selected.
•Disable the Eco function.
"Power Save" (page 4-31)
The power is cut off or the power
cable is disconnected.
•Disable the Eco function.
"-" scrolls from left to right on the
display
Eco (FuLL) mode is selected.
•Disable the Eco function.
"Power Save" (page 4-31)
The sleep mode is enabled by the
external input.
•Turn the external input OFF, or select a mode
other than sleep mode transition input with the
external input function.
"Sleep function" (page 4-19)
Output
operation
The received light intensity at which
the output turns ON and tur
ns OFF
is slightly
different.
The output timer is set.
Check the output timer setting.
"Output Timer" (page 4-7)
Hysteresis
A slight hysteresis is set to prevent chattering in
the output. If this level of received light intensity
is notable during detection, the detection toler-
ance may be low. Please review the detection
details.
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