Omron ZW Series User Manual page 225

Error type Problem
Measuremen The measured values
t error fluctuate.
Input error
The measured values
fluctuate gradually.
The measured values
differ from the
intended values.
Measured values are
output even though
there is no target.
Measurement values
are output even
though the sensor
head's fiber cable is
not connected to the
controller.
The logical beam
does not come out of
the Sensor Head.
Input error No input signal
received.
Probable cause
Intense ambient light is
present.
Mutual interference is
occurring.
The operating ambient
temperature is fluctuating.
The warm-up time is
inadequate.
The target to measure is
inclined or the position is
offset.
The scaling has not been
done correctly.
The zero reset value is not
correct.
The Sensor Head has not
been calibrated correctly.
The fiber cable edge or the
lens surface of the Sensor
Head is dirty.
The connection between the
Sensor Head and the
controller or the connection
with the extension fiber cable
is not normal.
Intense ambient light is
present.
Mutual interference is
occurring.
The controller side fiber
connector is dirty.
The connection between the
Sensor Head and the
controller or the connection
with the extension fiber cable
is not normal.
The fiber cable edge or the
lens surface of the Sensor
Head is dirty.
The fiber cable is
disconnected.
The LED_OFF input line is
short-circuited.
Cables are not connected
correctly.
The signal line is
disconnected.
Chapter 7
Troubleshooting
Possible countermeasure
• Shield the ambient light.
• Increase the background
removal level.
Check the Sensor Head
installation position.
• Maintain a certain operating
ambient temperature.
• Execute zero reset periodi-
cally using the standard
object.
Wait 30 minutes after
switching ON the power
before using.
Place the target to measure
correctly in the measuring
range.
Check the scaling setting.
Set the zero reset correctly.
Recalibrate the Sensor Head.
Clean the surface.
Check the fiber cable
connections.
• Shield the ambient light.
• Increase the background
removal level.
Check the Sensor Head
installation position.
Clean the surface.
Check the fiber cable
connections.
Clean the surface.
Replace the fiber cable.
Check the wiring.
Check the input circuit and the
wiring for proper connection.
User's Manual
Page
Smart
Monitor
ZW
Operation
Manual
p.1-9
p.2-15
-
p.1-8
p.3-21
p.3-37
p.1-19
p.1-16
p.1-15
Smart
Monitor
ZW
Operatio
n Manual
p.1-9
p.1-16
p.1-15
p.1-16
p.1-15
p.4-2
p.4-2
ZW
7-3