Omron ZW-8000 Series User Manual page 285

Error type Phenomenon
Measurement [DARK] is displayed on
error the main digital.
[BRIGHT] is displayed on
the main digital.
[NO.SRFC] is displayed
on the main digital.
[H.CALIB] is displayed on
the main digital.
The measurement value
is unstable even if the
workpiece and/or Sensor
head is stationary.
A measurement value is
output even if there is no
workpiece in the
measurement area.
ZW-8000/7000/5000
User's Manual
Cause
Amount of the light is insufficient.
The target is not in the
measurement range.
The connection of the Sensor
Controller and the Sensor Head or
the extension fiber cable is not
normal.
Calibration of Sensor Head is not
performed correctly.
Some contaminants may be
adhered.
Light amount is saturated.
There is no surface to measure.
The input values of the calculation
formula are not applied.
The Area Teach has failed when
using EdgeTracks.
A specific measurement surface
does not exist when using
EdgeTracks.
The track area could not be
followed due to a "DARK" state
when using EdgeTracks.
The calibration of Sensor Head is
not performed correctly.
Control edge in Exposure time or
surface setting for measurement is
not correct.
Calibration of Sensor Head is not
performed correctly.
There is a problem with the
connection between the Sensor
Controller and the Sensor Head or
the extension fiber cable.
The surface of fiber cable is dirty.
Intense ambient light is present.
Receiving light from the opposite
Sensor.
When measuring on a high-
reflectivity object out of the
measurement range, this cause a
wrong operation.
Countermeasure
Set the Exposure time to be long or
reduce Noise Cut Level within the
range of Noise Level.
Check the measurement range and
measurement area settings of the
Sensor Head, then place the target.
Confirm the connection of fiber cable. p.69
Retry to execute the calibration of
Sensor Head.
Clean the fiber cable.
Short the Exposure time.
Change the settings so as to
measure a surface that has been
detected.
Confirm the TASK measurement
value set in parameter X and Y.
Confirm the set track width
conditions and state of the light
reception waveform on the sensing
settings window.
Be sure that all surfaces are within
the measurement areas.
Execute Area Teach again.
Perform the calibration of the Sensor
Head again.
Change the Control edge or surface
setting in Exposure time from Peak to
each surface, 1 to 4.
Retry to execute the calibration of
Sensor Head.
Check the fiber cable connections.
Clean the surface.
• Shield the ambient light.
• Shorten the Measurement cycle or
increase the background removal
level so it is higher than the Noise
level.
Adjust the mounting position of
Sensor Head so as not to receive the
light from the opposite Sensor.
Shorten the Measurement cycle
(Exposure time) or increase the
background removal level so it is
higher than the Noise level.
Troubleshooting
Pages
p.122
p.126
p.63
p.130
p.77
p.69
p.129
p.140
p.141
p.99
p.133
p.133
p.48
p.129
p.140
p.48
p.39
p.69
p.122
p.65
p.126
283