KEYENCE FS-N10 Series - Manual (Page 100)

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- 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 the 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 under extremely short
conditions of the detection 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 turns 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.