Leuze KRT3CM Series User manual

KRT3CM, KRT3CW, KRT3CL1
Multicolor contrast sensor, White light contrast sensor, Laser
contrast sensor
Leuze electronic GmbH + Co. KG
[email protected]
In der Braike 1 73277 Owen Tel.: [phone]
We reserve the right to make changes – 2023/02/07 – 50148486-01
www.leuze.com•

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Safety
The laser safety notice applies only for device type KRT3CL1… with a laser as the
light source.
ATTENTION
LASER RADIATION – CLASS 1 LASER PRODUCT
The device satisfies the requirements of IEC 60825-1:2014 / EN
60825-1:2014+A11:2021 safety regulations for a product of laser
class1 as well as the U.S.21CFR1040.10 regulations with deviations
corresponding to Laser Notice No.56 from May 8, 2019.
ÄObserve the applicable statutory and local laser protection regula-
tions.
ÄThe device must not be tampered with and must not be changed
in any way.
There are no user-serviceable parts inside the device.
CAUTION! Opening the device can lead to dangerous exposure to
radiation!
Repairs must only be performed by Leuzeelec-
tronicGmbH+Co.KG.
Mounting
1
With glossy objects, fasten the sensor at an inclination of approx. 10° relative to
the object surface.
Sensor adjustment (teach) via teach button
Static 2-point teach
Suitable for manual positioning of the marks (device type KRT3C…S2/…).
Switching threshold in center Switching threshold near the mark
2
Position the light spot of the sensor in front of the background.
Press the teach button for 2…7s. Press the teach button for 7…12s.
The value for the background is ac-
cepted.
The LEDs flash synchronously.
The value for the background is ac-
cepted.
The LEDs flash alternately.
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Switching threshold in center Switching threshold near the mark
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Position the light spot of the sensor on the mark.
Press the teach button briefly.
The value for the mark is accepted.
The device is in RUN mode. The yellow
LED illuminates.
The switching threshold is set in the
center.
The value for the mark is accepted.
The device is in RUN mode. The yellow
LED illuminates.
The switching threshold is set near the
mark.
Dynamic 2-point teach
Suitable for marks moved during automated machine processes (device type
KRT3C…D2/…).
Switching threshold in center Switching threshold near the mark
2
Position the light spot of the sensor in front of the background.
Press the teach button for 2…7s. Press the teach button for 7…12s.
The measurement window opens.
The LEDs flash synchronously.
The measurement window opens.
The LEDs flash alternately.
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Allow the marks to pass through dynamically.
Press the teach button briefly.
The measurement window closes.
The device is in RUN mode. The yellow
LED is off.
The switching threshold is set in the
center.
The measurement window closes.
The device is in RUN mode. The yellow
LED is off.
The switching threshold is set near the
mark.
Static 1-point teach
Suitable for detecting all marks outside of the reference value (device type
KRT3C…S1/…).
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Standard sensitivity High sensitivity
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Position the light spot of the sensor in front of the reference value.
Press the teach button for 2…7s until
the LEDs flash synchronously.
Press the teach button for 7…12s un-
til the LEDs flash alternately.
Release the teach button.
The reference value is accepted.
The device is in RUN mode. The yellow
LED is off.
The standard sensitivity is set.
The reference value is accepted.
The device is in RUN mode. The yellow
LED is off.
The high sensitivity is set.
Switching threshold diagrams
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Static 2-point teach
A Label with marks
B Received signal
C Switching output for switching threshold in center
D Switching output for switching threshold near the mark
E Switching threshold in center
F Switching threshold near the mark
1 1. Teach point on background
2 2. Teach point on mark
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Dynamic 2-point teach
A Label with marks
B Received signal
C Switching output for switching threshold in center
D Switching output for switching threshold near the mark
E Switching threshold in center
F Switching threshold near the mark
1 Open measurement window
2 Close measurement window
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Static 1-point teach
A Label with marks
B Received signal
C Switching output for standard sensitivity
D Switching output for high sensitivity
E Standard sensitivity
F High sensitivity
1 Teach reference value
Pulse stretching function
Switching pulse stretching on or off
Hold down the teach button longer than 12s until only the green LED flashes.
Release the teach button. The green LED flashes for 2s more, while the yellow
LED displays the state:
– Yellow LED on: pulse stretching ON
– Yellow LED off: pulse stretching OFF
The change is accepted.
If the other state is to be set, repeat the process.
EasyTune function – Fine tuning of the switching threshold
Status of the function following power-on and completed teach event:
– Green LED continuous light: Ready
– Yellow LED continuously on: Mark detected
– Yellow LED continuously off: Mark not detected
Increase the switching threshold Reduce the switching threshold
Raise the switching threshold by press-
ing and holding the button for between
200ms and 2s. Every button press
raises the switching threshold incre-
mentally.
Lower the switching threshold by briefly
pressing the button for between 2ms
and 200ms. Every button press lowers
the switching threshold incrementally.
The button press is confirmed if the green LED flashes briefly once. The new
switching threshold is accepted.
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Increase the switching threshold Reduce the switching threshold
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A: 2-point teach
B: Label with marks
C: 1. Teach point on background
D: 2. Teach point on mark
E: Received signal
F: Switching threshold
G: Increasing the switching threshold
H: 1-point teach
I: Label with marks
J: Teach reference value
K: Received signal
L: Switching threshold
M: Increasing the switching threshold
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A: 2-point teach
B: Label with marks
C: 1. Teach point on background
D: 2. Teach point on mark
E: Received signal
F: Switching threshold
G: Reducing the switching threshold
H: 1-point teach
I: Label with marks
J: Teach reference value
K: Received signal
L: Switching threshold
M: Reducing the switching threshold
If the upper or lower end of the adjustment range is reached, the green
and yellow LEDs flash at a considerably higher frequency of 15 Hz for
the duration of one second.
Sensor adjustments via the IN input (pin2)
The following description applies to PNP switching logic:
Signal level LOW ≤2V
Signal level HIGH ≥ (UB-2V)
With types with NPN switching logic, the signal levels are inverted.
Teach-in
To teach, a teach signal is applied to the teach input (pin2). The duration of the
teach signal (LOW level on the teach input) determines the teach-in function.
NOTICE
Before a LOW level is applied for teaching-in functions, a HIGH level
must be applied for at least 20ms.
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Switching threshold in center / standard sensitivity
A Buttons locked
B Buttons can be operated
C Teach is started – Accept 1st teach value (background, reference value /
open measurement window)
D Teach duration
E Teach is ended – Accept 2nd teach value (mark / close measurement win-
dow)
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Switching threshold near the mark / high sensitivity
A Buttons locked
B Buttons can be operated
C Teach is started – Accept 1st teach value (background, reference value /
open measurement window)
D Teach duration
E Teach is ended – Accept 2nd teach value (mark / close measurement win-
dow)
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A Buttons locked
B Buttons can be operated
T Duration of the teach signal
Duration T [ms] Function
20…80 Standard-sensitivity teaching
120…180 High-sensitivity teaching
220…280 Activate pulse stretching
320…380 Deactivate pulse stretching
420…480 Configure the switching behavior of the switching output: light
switching
520…580 Configure the switching behavior of the switching output: dark
switching
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Locking teach button via the IN input (pin2)
A static HIGH signal (≥20 ms) at the teach input locks the teach button
on the device, such that no manual operation is possible (e.g. protec-
tion from erroneous operation or manipulation).
If the teach input is not connected or if there is a static LOW signal, the
button is unlocked and can be operated freely.
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