Keyence LR-ZH490CB - Troubleshooting and Error Resolution; Universal Change Detection Notes; Sensor Error Displays and Remedies; Default Settings and Values

6
5. Troubleshooting
5-1 Notes when using “Universal Change
Detection”
z If the [1spot] indicator is off after calibration, detection is unstable. The possible causes
are shown below. Check the installation condition, and perform calibration again.
• The distance between the sensor and the background has changed by 5% or more
from the calibrated distance.
• An insufcient amount of light has been reected from the background.
z If the response time is changed after calibration, perform calibration again.
5-2 Error display
Display Description Checks and Remedies
Control
Output
ErC
Current of 100 mA or more
ows through the control output
• Check power resistance.
• Check the control output cable for
contact with other cables.
OFF
ErS
System error
Contact the nearest sales ofce.
OFF
ErL
Laser diode failure
FAR
ErE
Error in the EEPROM that
stores sensor settings
*
Normal
uuu
Excessive reected light
Adjust the installation angle of the
sensor.
Inconsistent
___
Insufcient reected light
• Verify that the detecting distance is
within specications.
• Adjust the installation angle of the
sensor.
FAR
-FF
The detected object is too far
from the display range
• Move the target closer.
• Turn OFF the shift function.
Normal
i 0
to
i100
The “Universal Change
Detection” mode is being
utilized.
Use as is.
Normal
Lo
The key lock function is
enabled
Release the key lock function by
pressing UP and DOWN at the same
time (> 3s).
Normal
P_
The peak value is displayed
Press UP and DOWN at the same
time to switch screens.
Normal
b_
The bottom value is displayed
Press UP and DOWN at the same
time to switch screens.
Normal
No
display or
indicators
The sensor is not turned on
• Check the power voltage and
power capacity.
• Check the sensor power cable.
Inconsistent
* The settings can be rewritten up to 1 million times.
5-3 Default Settings/Values List
Item Default Item Default
Response time 50 ms Hold function OFF
Delay timer OFF Shift function ON
Amount of time for
timer
10 ms Clamp function OFF
External input OFF Display ON
DSC function 1 sec Setting value
LR-ZH490*: 100
During “Universal Change
Detection”: 90
Output operation L.ON
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E 1101-3
2016
14150E 1076-1 96M14150