MANUAL. IO Link. Application Box

Transcription

1 MANUAL IO Link Application Box

2 This document is protected by the law of copyright, whereby all rights established therein remain with the company SICK AG. Reproduction of this document or parts of this document is only permissible within the limits of the legal determination of Copyright Law. Alteration or abridgement of the document is not permitted without the explicit written approval of the company SICK AG. 2 SENSICK

3 Content 1 Introduction The IO-Link Application Box See through the eyes of a Sensor Objective and addressee of this manual Manual organization Instructions prior to commissioning System prerequisites Commissioning Installation Connection Starting the program Operation Operation for WTB sensors General tab Commissioning tab Expert tab Version Info tab Operation for WL12GC sensors Status tab Measurement tab Parameter tab Version Info tab Additional program functions Swapping the connected sensor Installing a new device DTM Saving a project Uninstalling FDT-Container Fault analysis and system prerequisites In the event of a fault Information for product demonstrations with the IO link Application Box Suppression of ambient light (all WTB3 systems) Functions of background suppression (all WTB3 systems) Application analysis with the IO link Application Box SENSICK 3

4 1 Introduction 1 Introduction 1.1 The IO-Link Application Box See through the eyes of a Sensor The IO link Application Box from SICK is a device, which can be used to connect an IO link capable sensor to a personal computer. Various sensor settings can be made via special software and the mode of operation of the connected IO link sensor can be displayed in a graph. As a result, the innovative IO link Application Box from SICK makes it possible for the first time and exclusively to read the function of the sensor live via the communication standard IO link and display it on a computer screen. This function opens up completely new possibilities in presenting the optical IO link sensors of the 3rd generation to our customers. The technological highlights of the products can not only be explained theoretically as previously and demonstrated as simple output signal display using the sensor tester; using the IO link Application Box, how the sensor works can now be displayed impressively in a graph. In addition, sensor applications can be tested and analyzed under real conditions to find the right sensor solution together with customers for solving their concrete tasks. In this way, the competence and know-how of SICK in the area of sensor technology and sensor applications can be demonstrated and its leadership in technology can be underlined effectively beyond the pure product benefits of SICK sensors. The objective is to position SICK in the perception of customers as the first partner to contact in the area of sensors and sensor applications. 1.2 Objective and addressee of this manual This manual is addressed to all employees of the SICK Group, who market and sell the optical IO link sensors of the 3rd generation in direct customer contact. With the IO link Application Box a tool is provided which is able to strengthen and support their sales arguments and to communicate the following message to customers: SICK is a competent technology leader in the area of sensor technology and applications. Consequently, the objective of this manual is to familiarize the sales force of SICK subsidiaries with handling the IO link Application Box. Installation and operation of the IO link Application Box are explained step by step. In addition, concrete examples show how this tool can support product presentation impressively in front of the customer and how it can improve customer service in case of application problems. Note The IO link Application Box is not for sale to customers! It is exclusively for the use of the SICK sales force and serves mainly as an argument aid and demonstration tool in sales discussions with customers as well as for application analysis. 1.3 Manual organization First, installation of the software program FDT-Container supplied with the IO link Application Box as well as connection and operation startup of the IO link Application Box are explained. Then the most important points of program operation using various sensor types are explained. In addition, suggestions are provided about how concrete features of the 3rd generation WTB series from SICK can be presented impressively and clearly using 4 SENSICK

5 1 Introduction the IO link Application Box. Finally, two practical examples show how the IO link Application Box can be used at customers' plants for application analysis. You can find additional information and documents about the IO link Application Box in SICK Intranet. If you still have questions, please contact Product Management. 1.4 Instructions prior to commissioning WARNING The IO link Application Box should only be used in an office environment for demonstration purposes or for application analysis of IO link devices! The IO link Application Box must not be used in facilities and processes where safety is critical, because a fault may result in a risk of injury or death! The IO link Application Box cannot be used to control machinery, systems and processes! The IO link Application Box should only be connected to USB ports that can supply the device with an uninterrupted current of 500 ma. The IO link Application Box should therefore, wherever possible, not be used on a portable computer running off battery. If using an external USB hub, this may cause the IO link Application Box to malfunction. In this case, connect the IO link Application Box directly to the computers USB interface. 1.5 System prerequisites Standard Intel Pentium PC or compatible, at least Pentium III 500 MHz At least 256 MB RAM, but 512 MB RAM is recommended Operating system: MS Windows 2000 Service Pack 3, XP Service Pack 2 or VISTA Monitor with at least 256 colours, colours is recommended (16-bit high-colour) Screen resolution at least 1024 x 768 pixels Hard drive: at least 50 MB of free disk space CD-ROM drive SENSICK 5

6 2 Commissioning 2 Commissioning 2.1 Installation Before the IO link Application Box can be connected to the computer and used, the software supplied on CD-ROM must first be installed. Installation starts automatically when the CD-ROM is inserted into the drive. Follow the instructions provided by the Installation Wizard. If the Installation Wizard does not start automatically, it can be started manually via the following path: Arbeitsplatz SICK FDT DEMO (D) SICK-FDT-Demo-Case SICK-FDT-Demo-Case.msi [My Computer SICK FDT DEMO (D) SICK-FDT-Demo-Case SICK-FDT-Demo- Case.msi] Note To carry out the installation, you will need Administrator rights for the computer you are using. If necessary, contact your relevant IT department about this. 2.2 Connection After successful installation of the demo software, you can connect up the IO link Application Box to your computer via a free USB interface. SICK IOL-Box 1.3 (depending on the relevant version used) and Wakeup appear on the IO link Application Box display. Connect an IO link compatible sensor (e.g. the WTB4C-3P3464, which is used as an example in the following instructions) to the M12 port of the IO link Application Box. The sensor is then activated. The status signal Connected on the IO link Application Box display indicates that a transparent data channel between the sensor and the IO link Application Box has been set up successfully. Note If using a USB hub without a network connection, the IO link Application Box may sometimes not be supplied with the necessary power (500 ma). In this case, connect the box directly to the computers USB interface or use a USB hub with a separate power supply. 2.3 Starting the program Once the sensor, the IO link Application Box and the computer have been connected, as described in the Connection section, the demonstration and diagnostics program SICK FDT-Container can then be started. To do this, go to the Start menu and select: Start Programme SICK SICK FDT-Container SICK FDT-Container [Start Programs SICK SICK FDT-Container SICK FDT-Container] 6 SENSICK

7 2 Commissioning This opens the SICK FDT-Container program. To load a new project (to select a sensor), go to the menu bar and select Datei Öffnen [File Open]. The project selection window then appears. From the demo projects available, select the project WTB4-DEMO.sfdt (depending on the sensor connected to the Application Box) and click on the Öffnen [Open] button. The selected demo project is then displayed in the Projektbaum [Project Tree]. To link the program to the sensor, go to the Projektbaum [Project Tree], right-click on WTB4 and select Trennen/Verbinden Verbinden [Disconnect/Connect Connect] from the context menu. Alternatively, you can also highlight WTB4 in the Projektbaum [Project Tree] and click on in the toolbar SENSICK 7

8 2 Commissioning Once the connection has been set up successfully, the Projektbaum [Project Tree] background turns green, as shown in the following screenshot: Now open the tools user interface by double-clicking on WTB4 in the Projektbaum [Project Tree]. The user interface is then shown in the right-hand window of FDT-Container. 8 SENSICK

9 3 Operation 3 Operation The IO link Application Box can be operated with various IO link-capable sensors. Each of these sensors requires its own driver software, the Device Type Manager (DTM), to display the individual sensor functions in graphs. If a previously stored project is called at program start of the FDT-Containers (as displayed above), the DTM starts automatically. When there is a new project, the corresponding DTM must be selected manually (see the Swapping the Connected Sensor chapter). Due to the various functions, the DTMs of the individual sensor types differ substantially. Consequently, the functions and operation of the IO link Application Box are first explained in detail with the WTB device types using the example of the WTB4C-3P3464. After that the operation of the IO link Application Box with the glass photoelectric switch WL12GC is explained. If you still have questions not answered by the explanations below, please don't hesitate to seek additional information from the product manager responsible for the respective sensor. 3.1 Operation for WTB sensors At the top of the user interface is a picture of the sensor used, with information about its serial number and the software version. Directly below there are two sliders to adjust the sensors Scanning Distance and Hysteresis. To the right of this is a round switching output indicator (grey object not in scanning range, yellow object in scanning range). In the centre of the user interface are four tabs: General, Commissioning, Expert and Version Info. These tabs allow parameterisation and function monitoring/display for the sensor. At the bottom are the command buttons. Note When using the Commissioning, Expert or Version Info tab the sensors orange LED switching indicator and the sender LED start flashing. This is a regular operating condition when the sensor is connected to the IO link Application Box. It is not a malfunction. Irrespective of the tab selected, you can adjust the scanning distance and the hysteresis via the sliders and transfer these settings to the sensor via the Apply button. If you do not click on the Apply button, the program simulates the changed scanning distance or hysteresis on the Commissioning and Expert tabs without writing these values to the sensor. When you click OK, the settings made are written to the sensor and the user interface is closed. Cancel closes the user interface without writing the settings to the sensor. The Refresh button reads the current internal settings for the sensor and displays them on the user interface. With this icon on the right-hand side of the program window, the flash animation 3 gewinnt! or Connect 3 (English version) can be started. It contains a number of interesting and illustrative explanations about the service scope of the new 3rd generation sensor from SICK SENSICK 9

10 3 Operation General tab The General tab gives you the option to carry out default settings for the sensor. Via the User Text field, you can give the sensor any name you choose or store other text information (max. ten spaces). The scanning distance of the sensor can be taught via the SICK FDT-Container software. To do this, point the sensor towards the object to be detected and click on Teach. It is also possible to use the Lock Teach Button function to deactivate the Teach function on the sensor to prevent the scanning distance from being changed inadvertently. The SICK photoelectric switches in the 3rd generation have a range of innovative solutions to ensure reliable object recognition even under adverse conditions (e.g. dirty lens or incidence of ambient light). The Diagnosis field on the General tab shows whether the sensor has detected a source of interference and has implemented measures to compensate. These are: VMA Detecting of declining remission energy due to e.g. dirty sensor lens or reflector RF Interference Active suppression of high-frequency ambient light Pulse Interference Short Circuit Active suppression of low-frequency ambient light Short circuit detection Via the Suppression of passive interference function, the sensor can effectively blind out even strongly reflective objects in the background using a second transmitter LED (diffuse LED). If this function is deactivated, operating faults may occur at the sensor output if there are strongly reflective objects in the sensors background. 10 SENSICK

11 3 Operation Commissioning tab The Commissioning tab shows the operating status of the sensor over a period of time. The following data is displayed on the left of the window: Red line Signal level (distance between sensor and object or background) Solid yellow line Set scanning distance Yellow dashed line Set switching hysteresis (switch-on and switch-off points) Green line Switching output of the sensor The chart on the right-hand side shows the frequency distribution in terms of the distance between the sensor and the object or object background. You can reset both displays using the Clear button Expert tab The Expert tab contains a graph to show the incidence of reflected light on the sensors 16 segment receiver element. The higher the column on the graph, the more light the relevant receiver element is receiving. The red line indicates the mean average of the light distribution on the receiver element and therefore the currently calculated distance between the sensor and the object. The yellow line and the shaded area around it indicate the set scanning distance and the hysteresis switching limits. Below the graph is the current Scanning Distance and Hysteresis, given in millimetres. Note A photoelectric proximity switch is not designed for distance measurements; the values specified for the scanning distance and hysteresis are to be used purely as a guide. Their accuracy is around ± 10% SENSICK 11

12 3 Operation The status of the switching output is displayed on the Expert tab by means of the column colours: Red columns Object is within the set scanning distance Sensor sets switching output to 1 Green columns No Object is within the set scanning distance Sensor sets switching output to Version Info tab The Version Info tab contains various product-related information, which is stored on the sensor and read out when the program is called up. Once you have transferred all required settings to the sensor via the Apply button, you can close the user interface again with OK. Before disconnecting the sensor and the IO link Application Box or the Application Box and the computer, you must first sever the connection via the SICK FDT-Container. To do this, right-click on Application Box in the Projektbaum [Project Tree] and choose the following options from the context menu that appears: Trennen/Verbinden Trennen [Disconnect/Connect Disconnect] Alternatively, you can highlight Application Box in the Projektbaum [Project Tree] and click on the icon in the toolbar. 12 SENSICK

13 3 Operation 3.2 Operation for WL12GC sensors The sensor WL12GC-2P2434 is an IO link capable photoelectric reflex switch of the W12 series, which is designed specifically for detection of glass, foils or other transparent materials. Compared with the WTB series, the WL12GC provides considerably more setting options and functions, which is the reason why the DTM for the WL12GC differs substantially from those of the WTB devices. Due to the greater scope of functions, not all functions, settings options and possibilities of the WL12GC can be dealt with in detail here. The objective is to explain the various views (tabs) of the DTM and the basic functions. Note To parameterize the sensor via the DTM, the rotary switch on the sensor housing must be set to Ext (External) Status tab The Status tab provides an overview of the current operating state of the sensor. The operating states (Status), error messages (Diagnosis) and sensor settings (Detection Mode) are displayed. These are in detail: Status Signal Invalid PD Teach Switching state display Invalid process date, which can occur during a teach procedure or a receive level overflow, for example Display during the teach procedure Diagnosis Receive Level Overflow Threshold Error Reflector Peak Error Missing Reflector Reflector Range Error Teach Error Reception signal is too strong, e.g., if the reflector is positioned considerably closer to the sensor after it is teached. Calculation of switching threshold during teach-procedure failed Interruption of the teach procedure, e.g., at a power outage Teaching of the sensor without reflector within sensing range Insufficient energy backflow from reflector; faulty switching is possible Teach procedure failed SENSICK 13

14 3 Operation Detection Mode Display of the currently selected detection mode and subtype, which can be set via the Parameter tab Measurement tab The Measurement tab shows the live signal curve of the sensor, analog to the Commissioning tab for the WTB devices. You can see in detail: Black line Red line Green line Blue/white line Yellow line Strength of the reflected sender light detected by the sensors receiver element Switch-on threshold Switch-off threshold Threshold value for adapting the switching thresholds if there is a lens or reflector that is slowly becoming soiled Switching output of the sensor The current numeric values of the signal level and the individual switching points are listed to the right of the graph. Directly below that, the switching signal can be hidden and threshold adapting deactivated. In addition, the rotary switch on the sensor housing can be deactivated. 14 SENSICK

15 3 Operation Parameter tab The Parameter tab provides the setting of different detection modes. Four detection modes and three subtypes can be selected: Bottle detection Detection of single, separate bottles. Adapting of switching (auto adjustment off) thresholds deactivated at soiling of sensor lens or reflector Bottle flow Detection of single bottles within a continuous delivery flow Film detection Detection of transparent foils Bottle detection Detection of individual, separate bottles with adapting of switching thresholds at soiling of sensor lens or reflector The subtype must be selected depending on the degree of transparency of the objects to be detected. It determines the distance between the switching thresholds (red and green lines in the Measurement graph) and the reflector signal level, hence the sensitivity of the sensor: Subtype 1 Detection of highly transparent objects, i.e., switching at a very small drop of the signal level Subtype 2 Detection of normal transparent objects, e.g., thick or soiled white glass Subtype 3 Detection of only slightly transparent objects, e.g., stained glass SENSICK 15

16 3 Operation Version Info tab The Version Info tab contains various product related information, which is stored on the sensor and read out when the program is called up. 16 SENSICK

17 4 Additional program functions 4 Additional program functions 4.1 Swapping the connected sensor To swap the connected sensor, after having severed the communication link as described above, you have to open a new project. To do this, go to the toolbar and click on (Erstelle ein neues Projekt [Create a New Project]). The old project is closed automatically. If it is not already displayed, open the DTM Catalogue (DTM = Device Type Manager, device-specific software), where you can select the new device. To call up the DTM Catalogue, go to the program menu and select: Ansicht DTM-Katalog [View DTM Catalogue] The DTM catalogue appears on the right in the SICK FDT-Container. Select Hersteller [Manufacturer] as a filter and then select SICK AG. Now double-click on Application Box and then on the device you require. Your selection appears in the Projektbaum [Project Tree] on the left of the SICK FDT-Container. Now connect the new sensor to the IO link Application Box and press the black reset button on the left-hand side of the IO link Application Box. To set up a communication link to the connected sensor, highlight the sensor model in the Projektbaum [Project Tree], go to the toolbar and click on (Verbindung mit Gerät aufbauen [Link to Device]). Then open the DTM by double-clicking on the device model SENSICK 17

18 4 Additional program functions 4.2 Installing a new device DTM To be able to operate a new IO link compatible sensor on the Application Box, the DTM for the sensor must first be installed. To do this, run the corresponding DTM installation file on Windows by double-clicking and follow the instructions of the Installation Wizard. After successful installation of the DTM, the DTM Catalogue of FDT-Container must be updated. First close all open projects via the program menu: Datei Schließen [File Close] Then use the program menu to open the Catalogue Management window: Werkzeuge Katalogmanagement... [Tools Catalogue Management...] Click on Durchsuche Registry [Search Registry] to search the computer for newly installed DTMs. These are then displayed on the left of the Catalogue Management window. Highlight the new DTMs with the Alle >> [All >>] button and click on Aktualisieren und Schließen [Update and Close]. The new DTMs are now available in the DTM Catalogue of the SICK FDT-Container and can be called up as described in the section Swapping the connected sensor. 4.3 Saving a project You have the option to save an open project to the hard drive. To do this, click on the Save icon in the toolbar of FDT-Container and, in the window that then appears, select where you want to save it to, as well as the file name. Alternatively, you can select the Save function via the program menu: Datei Speichern or Datei Speichern unter... [File Save] or [File Save As...] 4.4 Uninstalling FDT-Container To uninstall the SICK FDT-Container, go to the Windows Start menu and select: Start (Einstellungen ) Systemsteuerung Software [Start (Settings ) Control Panel Software] 18 SENSICK

19 4 Additional program functions From the list of installed programs, select the SICK FDT-Container, click on Entfernen [Remove] or Ändern/Entfernen [Change/Remove] and follow the next Uninstall instructions SENSICK 19

20 5 Fault analysis and system prerequisites 5 Fault analysis and system prerequisites 5.1 In the event of a fault Fault pattern Link-up attempt fails Nothing shown on the LCD display of the IO link Application Box After swapping the IO link Application Box, the serial interface address changes Possible causes and countermeasure When the sensor was swapped, was the reset button on the left side of the IO link Application Box housing pressed? Press the reset button! Is another program using the serial interface? End the program! Was the USB driver installed successfully? Check this in Windows Device Manager! Windows has flagged the serial interface as already in use even though the relevant program is no longer open. In Windows Device Manager, switch to a different address (COM1 COM8)! Can the USB port provide the necessary 500 ma supply current? USB hubs cannot be used without a power supply! Use the computer's USB interface! Problems with the USB driver. Unplug the USB connector and plug it in again! Problems with the bootloader. Unplug the USB connector and plug it in again, keeping the reset button on the side of the IO link Application Box pressed! Can the USB port provide the necessary 500 ma supply current? USB hubs cannot be used without a power supply! Use the computer's USB interface! Windows assigns a different COM port address to every individual IO link Application Box. In Windows Device Manager, switch to the required address (COM1 COM8)! 20 SENSICK

21 6 Information for product demonstrations with the IO Link Application Box 6 Information for product demonstrations with the IO link Application Box As already mentioned in the introduction to this manual, the IO link Application Box provides the possibility of demonstrating the great range of functions and operating reliability of the 3rd sensor generation from SICK impressively. Thanks to the possibility to see through the eyes of the sensor using the IO link Application Box, SICK can also be presented as a competent and innovative technology leader in the area of sensor technology and sensor applications. The following suggestions are designed to give you ideas how some of the special features of the WTB3 sensors can be presented impressively and clearly using the SICK IO link Application Box and a computer. The following points are dealt with specifically: Suppression of ambient light Functionality of background suppression Beyond that under the keyword Application Analysis two examples are provided of how real sensor applications can be examined and detection problems solved at the customers plant on site with the help of the IO link Application Box. Note The flash animation 3 gewinnt! or Connect 3 (English version), which is integrated in the DTMs of the WTB devices, can be used for better explanation of the various features of the WTB3 sensors. The animation provides explanations and background information about the general advantages of the 3rd sensor generation, the mode of operation of the background suppression, suppression of reflecting objects in the background and network capabilities with IO link. 6.1 Suppression of ambient light (all WTB3 systems) The sensors of the WTB3 series are distinguished by their ability to provide the most effective ambient light suppression of all devices available on the market of their respective classes. The sensor analyzes the incidence of ambient light regarding its frequency and set its own sender light pulses between the ambient light peaks. In this way, there is no faulty switching at the sensor output despite even strong influence of ambient light. As soon as the sensor detects potentially interfering extraneous light, it is analyzed automatically and ambient light suppression is activated. This is reported by the displays RF Interference (suppression of high-frequency light) or Pulse Interference (suppression of lowfrequency light) on the General tab of the DTM. To demonstrate the effectiveness of ambient light suppression by the WTB3 systems, you can try to interfere with the connected sensor using an extraneous light source (e.g., an energy-saving lamp), i.e., provoke faulty switching on the sensor output. There is no faulty switching even when the extraneous light source is placed very close to the sensor. The output only switches when the extraneous light source itself or another object enters the set detection range of the sensor. In comparison, a competitor's product can be shown, with which interference is substantially easier from an extraneous light source and which sets the switching output although no object is in the scanning range of the sensor SENSICK 21

22 6 Information for product demonstrations with the IO Link Application Box 6.2 Functions of background suppression (all WTB3 systems) The optical sensors of the 3rd generation from SICK work with the new OES3 reception module, which enables substantially more precise background suppression than previously. Thanks to the parallel evaluation of all 16 reception modules on the OES3 array, a mean value of the actual distance of the object to the sensor can be determined considerably more precisely on the array even when there is light scattering. The first steps of the flash animation Connect 3 on the topic of background suppression are suitable for explaining the mode of functioning of background suppression to the customer. Then you can switch to the DTM software, Expert tab, to demonstrate the practical mode of functioning of background suppression via the IO link Application Box. 22 SENSICK

23 7 Application analysis with the IO Link Application Box 7 Application analysis with the IO link Application Box Standard sensor applications, in which the objects to be detected have a diffusely reflecting surface and are set apart clearly from their background, do not normally present any great challenge regarding sensor settings and operating reserve. It becomes critical when strongly reflecting, high contrast, transparent or very uneven objects must be detected reliably. In such cases, the concrete application case can be analyzed with help of the IO link Application Box. How big is the operating reserve? Which signals does the sensor receive? Why does faulty switching occur in concrete cases? Are there optical interference effects, which hamper the sensor function? In the following, two selected examples are used to show how the IO link Application Box can be used to examine real applications, analyze problems and find solutions appropriate for the customers needs. Note Application analysis with the IO link Application Box from SICK is only possible if a customer uses an IO link-capable sensor in his facility. In many case, you can simply replace the standard sensor to be examined by an IO link sensor of the same type and carry out the analysis. Example 1: Detecting flat objects on a conveyor belt with WTB sensor In materials handling, flat objects with heights of a few millimetres to a few centimetres must often be detected reliably on a conveyor belt. This presents a challenge for a sensor with background suppression because the signal level differences between object and conveyor belt are very small with flat objects and the switching threshold to be set must be precisely between the two signal levels for object and background (conveyor belt). It is even more critical when the scanned surfaces of object and/or conveyor belt have strong contours (e.g., corrugated sheets) or have large contrast difference (e.g., silicon wafers). In this case, the signal level is not stable; signal fluctuations result, whereby setting the scanning range between the two signal levels is made even more difficult (see the depiction below) or even impossible. Output switching signal of the sensor (graph slightly retarded) Scanning range (Switching threshold) No object in scanning range: Background signal level of conveyor belt Object in scanning range: Signal level of material conveyed No object in scanning range: Background signal level of conveyor belt With help of the IO link Application Box, you can then analyze under real installation conditions whether the sensor intended for the conveyor belt system is suitable and which operating reserves exist. Connect the sensor installed in the system via the IO link Application Box with your computer, and start a corresponding project in FDT-Container. Have the objects to be detected transported by the conveyor belt and observe the signal level curve on the Commissioning tab of the DTM. To ensure reliable distinction between object SENSICK 23

24 7 Application analysis with the IO Link Application Box and background (conveyor belt), the signal level differences between object and background must be large enough that the switching threshold can be positioned reliably between these two signal levels via the slider Scanning Distance. If there is overlapping of the two signal levels, reliable object detection is not possible under the given conditions. Other object detection measures must be considered. Example 2: Generating customized sensor solutions Sometimes it is necessary to isolate sensors from the process to be monitored for reasons of safety, operation or hygiene. The sensors are then installed behind a perspex pane, for example, to prevent direct contact between sensor and product. The challenge is to ensure that the sensor does not switch due to the perspex pane in such an arrangement. With help of the IO link Application Box and the Expert evaluation of the device DTM, the incident light on the receiver element can be displayed in a graph and analyzed under real installation conditions. The graph below shows an example of the result of such an evaluation. The columns around the receiver element 12 depict the weak light reflectance of the perspex pane, behind which the sensor was placed. The columns around receiver element 4 show the reflectance of the object to be detected. Light reflectance of the perspex pane Light reflectance of the object to be detected The evaluation shows that the receiving array of the sensor registers the light reflectance of the object and the perspex pane simultaneously. Consequently, the sensor is able to detect the object through the perspex pane. However, the continual light reflection of the perspex pane causes continual exposure to light of the receiving element in the foreground area. Consequently, the switching output of the sensor is set permanently, and the sensor can no longer react to the actual object to be detected. As a result, although the object is detected, the switching state of the sensor does not change anymore. Based on the evaluation of the incident light on the receiving array of the sensor with help of the IO link Application Box, the SICK application development can modify the sensor in such a way that the sensor electronics specifically blinds out the light reflection caused by the perspex pane. As a result, the sensor no longer switches due to the reflection from the perspex pane. Only when the object is within the set scanning range, it is detected and the switching output is set. 24 SENSICK

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28 / GO/KE Printed in Germany ( ) Subject to change without notice The specified product features and technical data do not represent any guarantee 01 A4 2c int32 Australia Phone tollfree sales@sick.com.au Belgium/Luxembourg Phone +32 (0) info@sick.be Brasil Phone sac@sick.com.br Ceská Republika Phone sick@sick.cz China Phone ghk@sick.com.hk Danmark Phone sick@sick.dk Deutschland Phone info@sick.de España Phone info@sick.es France Phone info@sick.fr Great Britain Phone +44 (0) info@sick.co.uk India Phone info@sick-india.com Israel Phone info@sick-sensors.com Italia Phone info@sick.it Japan Phone +81 (0) support@sick.jp Nederlands Phone +31 (0) info@sick.nl Norge Phone austefjord@sick.no Österreich Phone +43 (0) office@sick.at Polska Phone info@sick.pl Republic of Korea Phone /4 kang@sickkorea.net Republika Slowenija Phone +386 (0) office@sick.si România Phone office@sick.ro Russia Phone info@sick-automation.ru Schweiz Phone contact@sick.ch Singapore Phone admin@sicksgp.com.sg Suomi Phone sick@sick.fi Sverige Phone info@sick.se Taiwan Phone sickgrc@ms6.hinet.net Türkiye Phone info@sick.com.tr USA/Canada/México Phone +1(952) tollfree info@sickusa.com More representatives and agencies in all major industrial nations at SICK AG Waldkirch Germany