KEYENCE LR-TB5000 Series - Manual (Page 11)

11
6-5. Hysteresis
Hysteresis is the difference between the value at which the output turns ON and the value
at which the output turns OFF.
• With [Standard], the hysteresis varies depending on the response time and the
detecting distance.
• With [Custom], you can specify an arbitrary value regardless of the detecting distance.
• For details on the operation differences between the detection modes, see
"4
Detection Mode" (page 5).
6-6. Received Light Sensitivity
By lowering the received light sensitivity level, you can reduce the number of times that
malfunctions such as the following occur.
• Detections of dirt and mist between the sensor and the detected object.
• Detections of translucent objects when passing through translucent objects to detect
the target.
You cannot change the received light sensitivity when " 6-1. Response Time" (page 10)
is set to [1ms/10ms]/[2ms/20ms].
6-7. Analog Lower and Upper Limits
For details, see "3-4. Analog Lower and Upper Limits" (page 4).
6-8. Analog Output Test
You can output arbitrary currents and voltages.
6-9. Input Function
For details, see " 3-2. External Input Selection" (page 4).
6-10. Output Hold
This function holds the display value and the output status that were in use immediately
prior to the LR-TB Series becoming unable to receive light.
„ When Output Hold is OFF „ When Output Hold is ON
6-11. Screen Brightness
You can set the operation to perform when no button operations are performed for a set
length of time.
• If you use the LR-TB Series for a long period of time, the display brightness will
decrease.
• If you set this to [100%], the display brightness will decrease at a faster rate.
6-12. Interference Prevention
With the LR-TB Series, you can prevent the effect of mutual interference by changing the
laser emission channel. If you are using multiple LR-TB Series units in close proximity to
each other, set each one to have a different laser emission channel.
6-13. Password
If you set this to [ON], you can set a personal identification number that must be entered to
release the
" Key Lock" (page 8). You can set the personal identification number to a
value from 0 to 9999.
6-14. Initialization
Initialize the sensor settings. You can also use the shortcut keys to execute the
initialization.
"Initialization" (page 8)
After initialization, you will have to configure the "3 Initial Settings" (page 3).
7 Other
Error Display
* When Output mode is set to [Error], while “Near” or “- - - -” is on display, the output would not
switch.
Output When an Error Occurs
*1 When Output mode is set to [Error], despite the setting of N.O. or N.C., LR-T would remain
OFF to protect the output circuit.
*2 When Output mode is set to [Error], LR-T would turn ON with N.O. and turn OFF with N.C.
FAR
NEAR
ON
OFF
ON
N.O.
N.C.
OFF
Hysteresis
Setting value
B
1000 2000
A
Hysteresis
Detecting
distance
Unit: mm
Response Time (ms) A(mm) B(mm)
25 to 2000 15 20
10, 20 30 40
1, 2 60 80
NEAR
0 0
ON
N.O.
OFF
NEAR
ON
N.O.
OFF
Display Display
Distance
display Distance
display
Setting Setting
Distance Distance
Output Output
Item Description
100% The display brightness is always kept at 100%.
30% (default value)
After a certain length of time elapses, the display brightness is set to
30%.
Display Off After a certain length of time elapses, the display is turned OFF.
Error Display Cause and Remedy
NEAR*
The detected object is not within the detectable range (the detected
object is too close).
- - - -*
Light reflected from the detected object could not be received.
• The amount of light received from the detected object is low.
• The detected object is not within the detectable range of the LR-TB (the
detected object is too far away).
Over Current
An overcurrent is flowing through the output wire.
• Check whether the output wire is connected correctly.
• Check whether the output wire is in contact with other wires.
Laser Error
A laser diode error has occurred.
• If you cannot fix the problem by restarting the product, the product must
be replaced.
EEPROM Error
1) Settings have been rewritten more than 1,000,000 times.
• The memory has reached the end of its service life.
2) A recording memory error has occurred.
• If you cannot fix the problem by restarting the product, the product must
be replaced.
System Error
An internal system error has occurred.
• If you cannot fix the problem by restarting the product, the product must
be replaced.
Error Display
Output ON or OFF Analog Output
N.O. N.C. 4 to 20 mA 0 to 10 V
NEAR ON OFF 3.8 0
- - - - OFF ON 20.5 10
Over Current *1 OFF OFF
The same as during normal
operation
Laser Error *2 OFF ON 2 0
EEPROM Error *2 The same as during normal operation
System Error *2 OFF ON 2 0