krt18bm multicolor contrast sensor dimensioned drawing · rgb transmitter with ... blocking of all...

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Easy to adjust through display of the signalstrength on the device

Simple sensitivity adjustment with multiturn potentiometer

RGB transmitter with selectable detectioncolor

Removable rotary operating knob enablescomfortable, tool-free adjustment

Maximum packing quality through shortresponse time

Remote control via control cable Blocking of all operational controls via con-

trol cable Analog output for signal evaluations in the

control

13mm12 - 30 V

DC 15 kHz

Accessories:(available separately)

Mounting systems(BTU 200M…, BT 95)

Mounting adapter for standard design (80mm x 53 mm x 30 mm) BTX 018M

Cable with M12 connector(K-D M12…)

UL USC

LISTED IPIP 69K69KIPIP 6767

IEC 60947... IEC 60947...

Dimensioned drawing

A Indicator diodesB Knurled knob for sensitivity adjustment (removable)C Display of the special functionsD Optical axisE Horizontal light spot orientation (transverse)F Light spot orientation vertical (lengthwise)G Toggle switch for detection color

Electrical connection

BRBR / BNBN

OUTOUT 2

GNDGND

OUTOUT 1

1212 - 3030 V +

ININ

WSWS / WHWH

BLBL / BUBU

SWSW/ BKBK

GRGR / GYGY

KRT18BM Multicolor contrast sensor

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Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]

https://www.clrwtr.com/Catalog/Manufacturers/Leuze-Electronic/Switching-Sensors/Special-Sensors/Contrast

Technical dataOptical dataScanning range 13mm ± 3mmLight source 1)

1) Average life expectancy 100,000h at an ambient temperature of 25°C

LEDs (red, green, blue)Light spot dimensions 1mm x 4mm (at a distance of 13 mm)Light spot orientation vertical (lengthwise) or horizontal (transverse)

TimingSwitching frequency switching outputs: 15kHzResponse time switching outputs: 33μs

analog output: 100μsReadiness delay < 300ms

Electrical dataOperating voltage UB 2)

2) For UL applications: use is permitted exclusively in Class 2 circuits according to NEC

12 … 30VDC (incl. residual ripple)Residual ripple ≤ 15% of UBOpen-circuit current 25mA (at 24V)Switching outputs/functions OUT1 push-pull, PNP dark switching (dark on),

NPN light switching (light on), changeover-capableOnly KRT18B…/G6T…: OUT2 push-pull, PNP light switching (light on),

NPN dark switching (dark on), changeover-capableSignal voltage high/low ≥ (UB-2V)/≤ 2VOutput current max. 100mAInput IN configuration input and blocking of the operational controlsAnalog output OUT2

KRT18B…/GCT…:KRT18B…/GC1T…:KRT18B…/GV1T…:

middle position of analog range for white target (90% rem.)current: 4 … 20mA, RL ≤ 500Ohmcurrent: 0.3 … 10mA, RL ≤ 500Ohmvoltage: 0 … 5V, RL ≥ 2kOhm

IndicatorsGreen LED continuous light readyYellow LED continuous light switching signal - dark switching (dark on)Bar graph reception signal strength, 13-levelYellow LEDs - special functions light/dark switching

Mechanical dataHousing diecast zinc, chemically nickel-platedConnector diecast zinc, chemically nickel-platedOptics PMMAOperation multiturn potentiometer for sensitivity adjustment,

button for changing the detection color (C)Weight 60gConnection type M12 connector, 5-pin

Environmental dataAmbient temp. (operation/storage) -40°C … +60°C/-40°C … +70°CProtective circuit 3)

3) 2=polarity reversal protection, 3=short circuit protection for all transistor outputs

2, 3VDE safety class 4)

4) Rating voltage 50V

IIIDegree of protection IP67, IP 69KLight source exempt group (in acc. with EN 62471)Standards applied IEC 60947-5-2Certifications UL 508, C22.2 No.14-13 2) 5)

5) These proximity switches shall be used with UL Listed Cable assemblies rated 30V, 0.24A min, in the field installation, or equivalent (categories: CYJV/CYJV7 or PVVA/PVVA7)

Chemical resistance tested in accordance with ECOLAB

Additional functionsFull control of the application 13-level bar graph signal display on the deviceLight/dark switching (L/D) can be activated via control buttonChange of detection color can be activated via control button

KRT18BM

Notes

Glossy objects:With glossy objects, thesensor is to be fastened atan inclination ofapprox. 10° … 15° rela-tive to the object surface.

Alignment aid:An alignment aid isincluded in the scope ofdelivery of each sensor.This facilitates simplealignment of the sensor to the working distance of 13 mm without needing toperform electricalcommissioning.

Observe intended use! This product is not a safety sensor

and is not intended as personnel protection.

The product may only be put into operation by competent persons.

Only use the product in accor-dance with its intended use.

10°…15°

13 mm

13 mm


Part number codeK R T 1 8 B M . H 2 / G 6 T - M 1 2

Operating principleKRT Contrast sensor

Series18B 18B series

Light sourceM Multicolor RGB

Light spot orientationH Horizontal (transverse)

V Vertical (lengthwise)

Setting2 Multiturn potentiometer with bar graph signal display, RGB changeover via button

Pin assignment of connector pin 4 / black cable wire (OUT1)G Push-pull switching output, PNP dark switching (dark on), NPN light switching (light on)

Pin assignment of connector pin 2 / white cable wire (OUT2)6 Push-pull switching output, PNP light switching (light on), NPN dark switching (dark on)C Analog current output 4 … 20mA

C1 Analog current output 0.3 … 10mA

V1 Analog voltage output 0 … 5V

Pin assignment of connector pin 5 / gray cable wire (IN)T Input for changing the detection color, light/dark switching and locking of the operational controls

Connection technologyM12 M12 connector, 5-pin



Order guideThe sensors listed here are preferred types; current information at Leuze website.

Mounting adapter BTX 018MWith the help of mounting adapter BTX 018M (part no. 50133412), contrast sensors KRT18B… can be mounted on existing mounting devices for contrast sensors in the standard design (80mm x 53mm x 30mm).

Order code Part no. Features

KRT18BM.V2/G6T-M12 50131246 Light spot orientation vertical (lengthwise), antivalent push-pull outputsSelectable additional function: light/dark switching

KRT18BM.H2/G6T-M12 50131247 Light spot orientation horizontal (transverse), antivalent push-pull outputsSelectable additional function: light/dark switching

KRT18BM.V2/GCT-M12 50132572 Light spot orientation vertical (lengthwise), analog output (4 … 20mA)Selectable additional function: light/dark switching

KRT18BM.H2/GCT-M12 50132612 Light spot orientation horizontal (transverse), analog output (4 … 20mA)Selectable additional function: light/dark switching

KRT18BM.V2/GC1T-M12 50132613 Light spot orientation vertical (lengthwise), analog output (0.3 … 10mA)Selectable additional function: light/dark switching

KRT18BM.V2/GV1T-M12 50132614 Light spot orientation vertical (lengthwise), analog output (0 … 5mA)Selectable additional function: light/dark switching

Accessories

BTX 018M 50133412 Mounting adapter for mounting on mounting devices for sensors in the standard design (80 mm x 53 mm x 30 mm)

KRT18BM


Adjusting the switching thresholdThe sensitivity of contrast sensor KRT18B is set via the multiturn potentiometer.

Adjustment procedureThe description is provided using the example of a dark mark on a light background. For the case of a light mark on a dark back-ground, the terms mark and background simply need to be exchanged.

1.Positioning the background under the light spot.If the bar graph indicator is to the left of the middle position, turn the multiturn potentiometer clockwise until the sensor switchesoff (yellow indicator LED Q1 off). Several full turns may be necessary here.

2.Positioning the mark under the light spot.If the bar graph indicator is to the right of the middle position, turn the multiturn potentiometer counterclockwise until the sensorswitches on (yellow indicator LED Q1 on). Several full turns may be necessary here.

3.Switch between mark and background and watch the bar graph while doing so. Turn the multiturn potentiometer until thedeflection between the mark and the background is symmetric about the middle of the bar graph.

4. If you are not able to find a setting that enables reliable detection, repeat the process with a different detection color.

Turning the spindle clockwise increases the sensitivity of the sensor. The signal on the bar graph is increased.

Turning the spindle counterclockwise reduces the sensitivity of the sensor. The signal on the bar graph is reduced.

LED Q1 off:

LED Q1 on:

>12sL / D

>12sL / D

>12sL / D

>12sL

/ D

Q1

>12sL / D

>12sL

/ D

Q1



Multiturn potentiometerA removable operating button is plugged into the multiturn potentiometer at the factory. The setting of the contrast sensor can thereby be performed manually without the need for a tool. If this is not desired, the operating button can be pulled off. A screw-driver is then needed for the setting.

Color changeoverContrast sensor KRT18B enables simple changeover of the detection color on the device. This is necessary if the contrast between the mark and the background is not sufficient for reliable detection with the set color.

Examples for optimum detection colors:

In general, the optimum detection color can also be found by selecting the color for the which the largest signal difference is displayed between mark and background on the bar graph.

Color of the mark Color of the background Optimum detection color

Black White Any

Red White Green

Yellow White Blue

Green White Red

Black Red Red

Black Green Green

Black Blue Blue

Press button C (Color) for 2 … 7s (LEDs flash in sync with a frequency of 2Hz) and release.

Upon release of the button, the detection color changes to the next color (order: green, blue, red).

>12sL

/ D

Rear view of sensor with operating button plugged

If necessary, loosen then operating button with a screwdriver

>12sL

/ D2 … 7s

KRT18BM


L/D – Light/dark switchingPress the C button longer than 12s. Release the button. To change the setting again, push the button

again for longer than 12 s and release.

Only the green LED flashes. 1) Only for devices without analog output

>12sL

/ D

> 12s

>12sL / D

>12sL / D

LED off =OUT1 (Pin 4): PNP dark switching,

NPN light switching

OUT2 (Pin 2) 1): PNP light switching, NPN dark switching

LED on =OUT1 (Pin 4): PNP light switching,

NPN dark switchingOUT2 (Pin 2) 1): PNP dark switching,

NPN light switching >12sL

/ D

> 12s



Sensor adjustments via the IN input (Pin 5)Signal level LOW 2V Signal level HIGH (UB-2V)

Setting the detection colorTransmitter color RED

Transmitter color GREEN

Transmitter color BLUE

Light/dark switchingPNP light switching / light on, NPN dark switching / dark on (OUT1)

PNP dark switching / dark on, NPN light switching / light on (OUT1)

Locking all operational controls via the IN input (Pin 5)A static HIGH signal ( 20ms) at the IN input (Pin 5) locks all operational controls on the sensor if required, such that no manual operation is possible (e.g., protec-tion from erroneous operation or manipulation).If the input is not connected or if a static LOW signal is being applied, all operational controls are unlocked and can be operated freely.

LOWt = 20 ... 80 ms

t

HIGH

Switch to RED

LOWt = 120 ... 180 ms

t

HIGH

Switch to GREEN

LOWt = 220 ... 280 ms

t

HIGH

Switch to BLUE

LOWt = 420 ... 480 ms

t

HIGH

LOWt = 520 ... 580 ms

t

HIGH

>12s12 %

>12sL

/ D

KRT18BM


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RGB transmitter Maximum packing quality through short

response time Automatic luster suppression Multiple teach modes in one device

13mm12 - 30 V

DC 15 kHz





UL USC


IEC 60947... IEC 60947...

Dimensioned drawing

A Indicator diodesB Teach buttonsC Display of the special functionsD Optical axisE Horizontal light spot orientation (transverse)F Light spot orientation vertical (lengthwise)


BRBR / BNBN

OUTOUT 2

GNDGND

OUTOUT 1

1212 - 3030 V +

n.n. c.c.

WSWS / WHWH

BLBL / BUBU

SWSW/ BKBK

GRGR / GYGY


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LEDs (red, green, blue)Light spot dimensions 1mm x 4mm (at a distance of 13 mm)Light spot orientation vertical (lengthwise) or horizontal (transverse)

TimingSwitching frequency 15kHzResponse time 33μsConveyor speed (during dyn. 2-point teach)

≤ 0.1m/s (with 1mm mark width)

Readiness delay < 300ms



12 … 30VDC (incl. residual ripple)Residual ripple ≤ 15% of UBOpen-circuit current 25mA (at 24V)Switching outputs/functions OUT1 push-pull switching output (high signal on mark)

OUT2 push-pull switching output (low signal on mark)Signal voltage high/low ≥ (UB-2V)/≤ 2VOutput current max. 100mA

IndicatorsGreen LED continuous light readyYellow LED continuous light mark detectedGreen and yellow LED flashing (2Hz) teach-in activeGreen and yellow LED flashing (8Hz) teaching errorYellow LEDs - special functions light/dark switching

Mechanical dataHousing diecast zinc, chemically nickel-platedConnector diecast zinc, chemically nickel-platedOptics PMMAOperation 2 teach buttons for mark (M) and background (B)Weight 60gConnection type M12 connector, 5-pin








Additional functions2 teach processes static teach on background and mark

dynamic teach on background and markLight/dark switching (L/D) can be activated via control button

KRT18BM

Notes







10°…15°

13 mm

13 mm


Part number codeK R T 1 8 B M . H 3 / G 6 X - M 1 2






Setting3 Teach-in

Pin assignment of connector pin 4 / black cable wire (OUT1)G Push-pull switching output, PNP active on mark, NPN active on background

Pin assignment of connector pin 2 / white cable wire (OUT2)6 Push-pull switching output, PNP active on background, NPN active on mark

Pin assignment of connector pin 5 / gray cable wireX No contact (n. c. - not connected)







KRT18BM.V3/G6X-M12 50131248 Light spot orientation vertical (lengthwise), selectable additional function: light/dark switching

KRT18BM.H3/G6X-M12 50131249 Light spot orientation horizontal (transverse), selectable additional function: light/dark switching

Accessories


KRT18BM


Sensor setting via teach button

Static 2-point teachSuitable for manual positioning of the marks.

The static 2-point teach can be performed in the reverse order in an analogous manner (first teach the mark).

Dynamic 2-point teachSuitable for applications in which the mark can be positioned under the light spot only with great effort.

Position the background. Press the B button (background) for 2 … 7s and release.

Position the mark. Briefly press the M button (mark) and release.

Value for background is accepted.LEDs flash synchronous (2Hz).

Value for mark is accepted.Sensor in RUN mode.

In the event of a teaching error (insufficient contrast between background and mark), the LEDs flash rapidly (8 Hz). Press button again to reset.

Position the background. Press the B button (background) button for 7 … 12s and release.

Allow marks to pass through dynamically. Briefly press the M button (mark) and release.

Measurement window opens.LEDs flash alternately (2Hz).

Measurement window closes.Sensor in RUN mode.


>12sL

/ D

Background

>12sL

/ D2 … 7s

>12sL

/ D

Mark

>12sL

/ D

>12sL

/ D

Background

>12sL

/ D7 … 12s

>12sL

/ D

>12sL

/ DKRT18BM Multicolor contrast sensor


Fine tuning the switching thresholdThe KRT18B… contrast sensor enables fine adjustment of the switching threshold to optimally adapt the sensor to the applica-tion.

The fine adjustment should be performed only after a teach-in.

L/D – Light/dark switching

Briefly pressing the ’–’ button reduces the sensitivity of the sensor. In the case of dark marks on a light background, the button must then be pressed once or twice if the mark is not reliably detected.

Briefly pressing the ’+’ button increases the sensitivity of the sensor. In the case of dark marks on a light background, the button must then be pressed once or twice if the sensor switches erroneously at locations on the background.

Press the B button longer than 12s. Release the button. To change the setting again, press the B button again for longer than 12?s and release.

Only the green LED flashes.

>12sL / D

Button ’–’

>12sL / D

Button ’+’

>12sL

/ D

> 12s

>12sL / D

>12sL / D

LED off =OUT1 (Pin 4): high signal on markOUT2 (Pin 2): low signal on mark

LED on =OUT1 (Pin 4): low signal on markOUT2 (Pin 2): high signal on mark

>12sL

/ D

> 12s

KRT18BM


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Easy to adjust through display of the signalstrength on the device

RGB transmitter Maximum packing quality through short

response time Automatic luster suppression Remote control via IO-Link or control cable Blocking of all operational controls via

IO-Link or control cable Multiple teach modes in one device Automatic threshold tracking through

tracking function

13mm12 - 30 V

DC 15 kHz22 kHz





USB IO-Link Master SET US2-IL1.1

UL USC


IEC 60947... IEC 60947...

Dimensioned drawing

A Indicator diodesB Teach buttonsC Display of the special functionsD Optical axisE Horizontal light spot orientation (transverse)F Light spot orientation vertical (lengthwise)

B

A

C

C

B

D

F E

1717

42828

2323

151539,6

39,6 4747

13,513,5

1212M x1x1

32,532,5

4M /4deep/4deep

1515

12,2

12,2

12,8

12,8

10,5

10,53,3

3,3

M4 (Ø

M4 (Ø

)

5


BRBR / BNBN

OUTOUT 2

GNDGND

OUTOUT 1/IO-Link1/IO-Link

1212 - 3030 V +

ININ

WSWS / WHWH

BLBL / BUBU

SWSW/ BKBK

GRGR / GYGY


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LEDs (red, green, blue)Light spot dimensions 1mm x 4mm (at a distance of 13 mm)Light spot orientation Vertical (lengthwise) or horizontal (transverse)

TimingSwitching frequency speed models KRT18BM…S…: 22kHz

other models: 15kHzResponse time speed models KRT18BM…S…: 22,5μs

other models: 33μsConveyor speed (during dyn. 2-point teach)

≤ 0.1m/s (with 1mm mark width)

Readiness delay < 300ms



SIO mode: 12 … 30VDC (incl. residual ripple)COM2 mode: 18 … 30VDC (incl. residual ripple)

Residual ripple ≤ 15% of UBOpen-circuit current 25mA (at 24V)Switching outputs/functions OUT1 push-pull switching output, IO-Link SIO mode, changeover-

capableOUT2 push-pull switching output, adjustable

Signal voltage high/low ≥ (UB-2V)/≤ 2VOutput current max. 100mAInput IN teach input and blocking of the operational controlsIO-Link COM2 (38.4kBaud), version 1.1, min. cycle time 2.3ms,

SIO is supportedDual Channel yes (parallel IO-Link communication and fast switching output

OUT2 is supported)

IndicatorsGreen LED continuous light readyYellow LED continuous light mark detectedGreen and yellow LED flashing (2Hz) teach-in activeGreen and yellow LED flashing (8Hz) teaching errorBar graph reception signal strength, 13-levelYellow LEDs - special functions position of the switching threshold, light/dark switching,

tracking

Mechanical dataHousing diecast zinc, chemically nickel-platedConnector diecast zinc, chemically nickel-platedOptics PMMAOperation 2 teach buttons for mark (M) and background (B)Weight 60gConnection type M12 connector, 5-pin








Additional functionsFull control of the application 13-level bar graph signal display on the device2 teach processes static teach on background and mark

dynamic teach on background and markLight/dark switching (L/D) can be activated via control buttonsThreshold close to the mark can be activated via control buttonsTracking function for automatic signal tracking

can be activated via control buttons

Warning output signals if the tracking function can no longer readjust the sensitivity

Pulse stretching configurable via IO-Link

KRT18BM

Notes







10°…15°

13 mm

13 mm


Part number codeK R T 1 8 B M . H S 5 / L 6 T - M 1 2






Additional functionS Speed, 25?kHz switching frequencyT Tracking function for automatic signal tracking

N/A Without additional function, switching frequency 15kHz

Setting5 Teach-in with bar graph signal indicator

Pin assignment of connector pin 4 / black cable wire (OUT1/IO-Link)L Push-pull switching output in SIO operation, PNP active on mark, NPN active on background, IO-Link communication

Pin assignment of connector pin 2 / white cable wire (OUT2)6 Push-pull switching output, PNP active on background, NPN active on mark

Pin assignment of connector pin 5 / gray cable wire (IN)T Teach input







KRT18BM.V5/L6T-M12 50130950 Light spot orientation vertical (lengthwise), selectable additional function: switching threshold near mark, light/dark switching

KRT18BM.H5/L6T-M12 50131241 Light spot orientation horizontal (transverse), selectable additional function: switching threshold near mark, light/dark switching

KRT18BM.VT5/L6T-M12 50131242 Light spot orientation vertical (lengthwise), selectable additional function: switching threshold near mark, tracking function

KRT18BM.HT5/L6T-M12 50131243 Light spot orientation horizontal (transverse), selectable additional function: switching threshold near mark, tracking function

KRT18BM.VS5/L6T-M12 50131244 Light spot orientation vertical (lengthwise), speed model with 25kHz switching frequency, selectable additional function: switching threshold near mark, light/dark switching

KRT18BM.HS5/L6T-M12 50131245 Light spot orientation horizontal (transverse), speed model with 25kHz switching frequency, selectable additional function: switching threshold near mark, light/dark switching

Accessories


KRT18BM


Sensor setting via teach button

Static 2-point teachSuitable for manual positioning of the marks.

The static 2-point teach can be performed in the reverse order in an analogous manner (first teach the mark).

Dynamic 2-point teachSuitable for applications in which the mark can be positioned under the light spot only with great effort.

Position the background. Press the B button (background) for 2 … 7s and release.

Position the mark. Briefly press the M button (mark) and release.

Value for background is accepted.LEDs flash synchronous (2Hz).

Value for mark is accepted.Sensor in RUN mode.


Position the background. Press the B button (background) button for 7 … 12s and release.

Allow marks to pass through dynamically. Briefly press the M button (mark) and release.

Measurement window opens.LEDs flash alternately (2Hz).

Measurement window closes.Sensor in RUN mode.


>12s12 %

>12sL

/ D

Background

>12s12 %

>12sL

/ D2 … 7s

>12s12 %

>12sL

/ D

Mark

>12s12 %

>12sL

/ D

>12s12 %

>12sL

/ D

Background

>12s12 %

>12sL

/ D7 … 12s

>12s12 %

>12sL

/ D

>12s12 %

>12sL

/ DKRT18BM Multicolor contrast sensor


Signal strength indicatorThe detection reliability can easily be monitored and optimized via the bar graph display integrated in the device.

Fine tuning the switching thresholdThe KRT18B… contrast sensor enables fine adjustment of the switching threshold to optimally adapt the sensor to the applica-tion.

The fine adjustment should be performed only after a teach-in.

For an optimum setting, the displayed maximum and minimum signal must be symmetric about the switching point (middle of the bar graph).

For devices with tracking function, a fine adjustment of the switching threshold is only possible when tracking is deactivated.

High signal (e.g., bright background): LED Q1 off:

Low signal (e.g., dark mark): LED Q1 on:

Set switching point:

The sensor is set optimally if the maximum and minimum signal are symmetric about the switching point.

Briefly pressing the ’+’ button increases the sensitivity of the sensor, the bar graph indicates more signal.

Briefly pressing the ’–’ button decreases the sensitivity of the sensor,the bar graph indicates less signal.

>12s12%

>12sL / D

>12s12 %

>12sL

/ D

Q1

>12s12%

>12sL / D

>12s12 %

>12sL

/ DQ1

>12s12%

>12sL / D

>12s12%

>12sL / D

Button ’+’

>12s12%

>12sL / D

Button ’–’

KRT18BM


Enabling/disabling additional functions

Available special functions (dependent on device model)

12% – switching threshold close to the markThis function is suitable for applications in which the background exhibits high inhomogeneity. It is operated via the M button (> 12 s). The shift of the switching threshold is effective immediately, independent of the teach event.

The LED is also activated if a switching threshold position other than 50% was selected via IO-Link.

L/D – Light/dark switchingThe function inverts the switching logic of the switching outputs. It is operated via the B button (> 12 s).

TRA – Tracking functionThis function increases the process stability of the contrast sensor. Even if the mark changes slightly in color or contrast, the sensor operates with optimum switching threshold since the threshold is automatically readjusted during the process. It is oper-ated via the B button (> 12 s).

Press the button assigned to the additional function for longer than 12 s.

Release the button. To change the setting again, push the button again for longer than 12 s and release.

Only the green LED flashes.

Switching threshold in center between mark and background.

Switching threshold is near the mark.

OUT1 (Pin 4): high signal on mark.OUT2 (Pin 2): low signal on mark.

OUT1 (Pin 4): low signal on mark.OUT2 (Pin 2): high signal on mark.

Tracking function inactive. Tracking function active.

>12s12 %

>12sL

/ D

> 12s

>12s12%

>12s12%

LED off = additional function inactive

LED on = additional function active

>12s12 %

>12sL

/ D

> 12s

>12s12% LED off LED on

>12s12%

>12sL / D LED off LED on

>12sL / D

>12sTRA LED off LED on

>12sTRA



IO-Link interfaceContrast sensor KRT18B… is equipped with an IO-Link interface. Furthermore, the sensor can easily, quickly and, thereby, eco-nomically be configured and diagnostic information read out. With a small amount of effort, the sensor can also be integrated in the control.

The sensor can be economically integrated in the control via an IO-Link master. The device description file (IODD) is required for this purpose. An exact specification of the IO-Link parameters can be found in the corresponding HTML file. All files are available in the download area of the sensor at Leuze website.

PC configuration and visualization is performed comfortably with the USB-IO-Link Master SET US2-IL1.1 (part no. 50121098) and the Leuze Sensor Studio (in the download area of the sensor at Leuze website).

IO-Link process dataThe sensor transmits 2 bytes to the master.

Visualizing the process data with Leuze Sensor Studio

Simple visualization of the process data in the Leuze Sensor Studio PC configuration software enables a fast assessment of the process stability.

Data bitAssignment Default settings

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0Switching output 0 = no mark, 1 = mark detected

Tracking warning 1)

1) Only in combination with tracking function. For sensor versions without tracking function, this bit is not used.

0 = no warning, 1 = warning

Sensor operation 0 = off, 1 = on

Switching threshold LSBValue range 0 … 31(0 … 100% in approx. 3% steps)

0% = min. switching threshold100% = max. switching threshold

Switching threshold

Switching threshold

Switching threshold

Switching threshold MSB

Active transmitter LSB 00 = red, 01 = green,10 = blueActive transmitter MSB

Not used free

Measurement value LSBValue range 0 … 31(0 … 100% in approx. 3% steps)

0% = min. signal level100% = max. signal level

Measurement value

Measurement value

Measurement value

Measurement value MSB

KRT18BM


Mark counterContrast sensor KRT18B… has an internal mark counter. This counts the switching events and can be freely read out and reset. This function enables a simple validation of the process.

Overview of the most important configuration options via IO-Link

Function block Function Description

General

Lock operational controls Operation of both teach buttons is disabled.

Lock Easytune Fine adjustment of the sensitivity via the + and – buttons is disabled.

Device reset Factory settings are restored.

Tracking function 1)

1) Only for sensor versions with tracking function

The tracking function can be switched on and off here.

Switching output

Switching output function OUT1

The output can be set to "high signal on mark" or "low signal on mark".

Switching output function OUT2

The output can be set to "inverted function with respect to OUT1" (antivalent out-put), "identical function as OUT1" (useful in IO-Link dual-channel operation) or to “warning output”1) (with tracking devices, this signals if the sensitivity can no longer be readjusted; in this case, devices must then be retaught).

Time module Time functions can be configured here. The functions act on all switching outputs. The most important time function is pulse stretching. This is used to extend even very short output signals to a minimum length to allow them to be detected by a slower control input.

Teach

Transmitter color during teach The colors used during teach can be selected here. It makes sense to restrict colors if teaching with certain colors is found through experience to produce especially good results, particularly in the case of inhomogeneous objects. Normally, all three colors should be used.

Static 2-point teach Mark and background are taught one after the other. When teaching on the mark, the mark is positioned in the light spot, the teach is started and then the background is presented and the teach concluded. When teaching on the background, the order is reversed.

Dynamic 2-point teach The process is started with the light spot on the background. Multiple marks are moved through the light spot. The teach is then concluded.

Teach status The status of the last teach is displayed here. The following values are possible: "teach successful", "teach error" (is displayed if the contrast between mark and background during the teach is too low) and "last valid values used" (is displayed after acknowledgment of a teaching error).

Reset teaching error A teaching error can be reset here. The last valid teach values are restored.

Switching threshold position

Selection of the switching threshold position

The position of the switching threshold between mark and background can be selected here. As a rule, a 50% threshold (in center between mark and background) is useful. With very inhomogeneous backgrounds, a threshold near the mark (e.g., 12%) results in increased detection reliability. The position of the switching thresh-old can be changed independent of a teach event.

Easytune: increase sensitivity

This is an alternate possibility for making fine adjustments to the switching thresh-old. The sensitivity of the sensor is increased by one increment; dark colors (e.g., marks) tend to be detected. Corresponds to a short press of the + button on the sensor.

Easytune: reduce sensitivity

The sensitivity of the sensor is reduced by one increment; light colors (e.g., back-ground) tend not to be detected. Corresponds to a short press of the – button on the sensor.

Teach result memory

Index for loading a teach result memory

Max. 30 teach results stored in the main memory can be loaded here. This is an important property for recipe modifications.

Index for writing a teach result memory

Max. 30 teach results can be stored in the sensor here. This is an important property for recipe modifications.

Display teach result memory The stored teach results can be read out here without needing to load them in the main memory.

Working parametersThe current working parameters of the sensor are stored here. If the teach results are not stored in the sensor, but rather in the control and are to be reloaded during a recipe/format change, then these parameters must be read out or rewritten.



Diagnostic dataThe process reliability can be read out in the diagnostic data following a teach-in. This information refers only to the two taught values for mark and background. For very inhomogeneous detection objects, the true process reliability may deviate from the displayed value.

100%: very high process reliability 75%: high process reliability 50%: sufficient contrast between background and mark.

Fluttering of the materials that are to be detected should be avoided. 25%: low contrast between background and mark.

Very stable process conditions must be ensured; fluttering of the materials that are to be detected must absolutely be avoided. In some cases, reteaching with the sensor at an incline of 10°…15° relative to normal yields better process conditions.

KRT18BM


Sensor adjustments via the IN input (Pin 5)In addition to configuring via IO-Link, many sensor functions can also be configured via the teach input.

Signal level LOW 2V Signal level HIGH (UB-2V)

Teach-inStatic 2-point teach

Dynamic 2-point teach

Switching thresholdSwitching threshold close to the mark

Switching threshold in center between mark and background

Light/dark switchingLow signal on mark (OUT1)

High signal on mark (OUT1)

LOWt = 20 ... 80 ms

t

HIGH

Accept 1st teach value (background)

Accept 2nd teach value (mark)

LOWt = 120 ... 180 ms

t

HIGH

Open the measurement window (start on background)

Close the measurement window

LOWt = 220 ... 280 ms

t

HIGH

LOWt = 320 ... 380 ms

t

HIGH

LOWt = 420 ... 480 ms

t

HIGH

LOWt = 520 ... 580 ms

t

HIGH



Tracking functionActivating the tracking function

Deactivating the tracking function

Locking teach buttons via the IN input (Pin 5)

A static HIGH signal ( 20ms) at the IN input (Pin 5) locks all operational controls on the sensor if required, such that no manual operation is possible (e.g., protec-tion from erroneous operation or manipulation).If the input is not connected or if a static LOW signal is being applied, all operational controls are unlocked and can be operated freely.Note: Locking of the operational controls is also possible via IO-Link.

LOWt = 620 ... 680 ms

t

HIGH

LOWt = 720 ... 780 ms

t

HIGH>12s

12 %>12sL

/ D

KRT18BM


krt18bm multicolor contrast sensor dimensioned drawing · rgb transmitter with ... blocking of all...

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