Siemens Milltronics Process Instruments Inc.

1954 Technology Drive, P.O. Box 4225 Peterborough, Ontario K9J 7B1 / Canada

Tel.: (705) 745-2431 Fax: (705) 741-0466 www.siemens.com/processautomation

AG022110

SITRANS LG200 Guided Wave Radar Operating SITRANS LG200 with SIMATIC PDM

Objective: Become familiar with operating the SITRANS LG200 with SIMATIC PDM.

Equipment: Part MLFB Part Number

• SIMATIC PDM

• SITRANS LG200 Electronics 7ML1300-XXXXX-XXA0 and a probe shown below:

LG200 Coaxial Probe 7ML1301-1XXXX-XXX

LG200 HT/HP Probe 7ML1301-2XXXX-XXX LG200 Coaxial HP Probe 7ML1301-3XXXX-XXX

LG200 Coaxial Overfill Probe 7ML1301-4XXXX-XXX

LG200 Coaxial HT/HP Steam Probe 7ML1301-5XXXX-XXX

LG200 Interface Probe 7ML1301-6XXXX-XXX

LG200 Twin Rod Probe 7ML1302-1XXXX-XXX

LG200 Twin Flexible Rod (Bulk Solids)

7ML1302-2XXXX-XXX

LG200 Twin Flexible Rod 7ML1302-3XXXX-XXX

LG200 Single Rigid Rod 7ML1303-1XXXX-XXX

While every effort was made to verify the following information, no warranty of accuracy or usability is expressed or implied.

Overview:

This application guide is an addition to the operating instructions. Please review SITRANS LG200 operating instructions to ensure you are familiar with your guided wave radar device. .

APPLICATION GUIDE

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Using SITRANS LG200 and SIMATIC PDM

1. Install Simatic PDM (see www.siemens.com/LG200 and choose Application Guides under the More Info link. Then navigate to the SIMATIC PDM section for info on installing PDM).

2. Ensure correct EDD (Electronic Device Description) is installed for device to be connected (for SITRANS LG200). To be sure, visit www.siemens.com/LG200 and choose Downloads under the More Info link. There you will find the latest latest EDD version.

3. Save and unzip this EDD in a known location on your PC/PG.

4. To install a new EDD, go to:

a) Start>Programs>Simatic>Simatic PDM>Manage Device Catalog.

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b) Then, you should now see the Manage Device Catalog screen.

c) Browse to the location where you have saved and unzipped your new EDD file.

d) Once the EDD is installed, run Lifelist and scan for devices.

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To run Lifelist:

1. Connect your USB or Serial (COM port) HART modem and set the appropriate address. [COM port 1 is usually used by the Serial HART modem. USB versions usually use higher value ports (6, 7 or 8)]

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Lifelist.lnk

2. Double click on your desktop Icon for Lifelist or navigate to Start->SIMATIC>SIMATIC PDM>Lifelist. You will then see the following screen showing that there has been a HART modem connected and it found an LG200 at address 0.

3. Click on Device Identification and the SITRANS LG200 will be identified and the correct EDD will be selected.

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4. Click OK. PDM will now open a default window of parameters for the SITRANS LG200.

Creating an LG200 project in PDM

You should now start by saving these parameters as a project for future use. These parameters will act as a RESET to factory by using a download to device. (SITRANS LG200 has no software reset built in). Name the settings such as Basic Settings or Default Settings. (Ensure you save the file as a .pdm file extension.)

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Then, upload all parameters from your device so you are working with the settings in the transmitter memory. Click on the Upload to PC/PG button.

Note: If you cannot see these boxes, please click on the LG200 icon to expand the tree.

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Loaded status will be visible in the Status column below.

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You can now commission the SITRANS LG200 using the PDM Quick Start Wizard.

1. Enter data relevant to your LG200, such as Tagging Information, and other descriptive information. Then click Next.

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2. Using the pull down menus in Step 2, you can set up your parameters that are relevant to your installation. You may have to consult your catalog part number or nameplate for details of your probe type and length. Catalog sheets are available at www.siemens.com/LG200 for reference.

You can also consult your device nameplate for some of the information. An example is below:

Model Number (7ML130x-x) refers to the MLFB Catalog structure number, the insertion Length (Y01) and associated Z options (C12 – 3.1 materials traceability, Y15 – tagging for example). Model ref (7xA-x) is the probe model reference that will need to be entered in the programming as recognition for parameters related to the probe type. Also be sure to enter the type of threaded connection you are using: NPT or G (BSPP).

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You should pick your relevant probe type, the probe mount (Flange, NPT or BSP) and the Length (Y01= ……) using the nameplate or measure your probe. (Remember that the insertion lengths for the BSP and NPT are measured from different places: the BSP (G) from the thread top (nearest the transmitter enclosure) and the NPT from the bottom of the thread. Now set your units (a change here will automatically adjust the values and convert from inches to cm or any other choice), any blanking (blocking) distance and any level offset (elevated zero for example) and Dielectric. This dielectric setting is probe dependant and some probes will not allow all four options to be shown. (This setting will adjust other parameters to ensure easier setup) Incorrect selection of a probe will not necessarily show faults but will measure incorrectly and also show errors within SIMATIC PDM.

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3. Next, pick the application type. The choices shown will depend on the probe type identified earlier. In the firmware of the device, there are dependencies. For example, SIMATIC PDM will not allow measuring of interface of oil/water with the incorrect probe and therefore will only show a maximum of two choices.

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Then, set up your Zero and Span values. These are the values that you use for 4 mA and 20 mA respectively. 4 mA and 20 mA values can also be reversed. However, typically 4 mA will be seen as 0 m (for example, a dry probe) and 20 mA can be any value up to the probe length. Note: Be careful with using a 20mA value as high as the length of the probe as you may encounter “: Transition Zones”. These are probe dependant and information is found on the catalog sheets and manual: www.siemens.com/LG200. (A transition zone is an area of measurement that could involve areas of unlinearity, and although measurement is still performed, it is not wholly predictable.)

5. Once finished, the Quick Start Wizard in PDM will show a “before and after” programming screen and ask the user if the parameters should be transferred to the device or not. If you are happy with the new settings, select Apply and Transfer.

This concludes the set up of the SITRANS LG200.

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At this point, the following window displays:

This error indicates that the password in PDM does not match the password in the SITRANS LG200 transmitter. You will have to OK this message and then cancel the wizard setup. You will need to access the LG200 manually to retrieve the password from the device. If you do not know your password, contact your local Siemens representative. An encrypted password can be found in the New Pass parameter. Give this number to your Siemens representative who can enter it into a password program to retrieve the password which can then be changed. SIMATIC PDM can also find this number for you.

Write Protection

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After clicking on Forgot password?, you will get an encrypted number to give to your Siemens representative for a new password.

24576 represents a new password of 6 (in this example). Then return to the Write Protection menu.

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Click on User Password and enter 6 (used in this example) and then click Send Password. You will then see a “send password” message telling you that you have successfully unlocked the LG200 and you can then return to the Quick Start Setup Wizard.

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Viewing an Echo Profile

Choose Echo Profile Utilities in the Device menu. An echo similar to that below should be shown (example shown below is a coaxial probe only).

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If you see a profile like this:

with jagged edges or noise on the profile, you should ignore it and take another shot. This anomaly is caused by the HART protocol and speed issues with update time. You may sometimes notice that the window is stretched beyond what can be seen. To correct this, the screen can be dragged across from right to left in order to view the status and ask for another profile to be taken. The profile above shows an empty tank with a coaxial probe. The markers shown are Blanking (orange) and End of Probe (Red). The scales are measured distance on the X axis and a digital representation of the Signal magnitude (not an actual value that is shown on the display of the SITRANS LG200) on the Y axis. You can also see an echo in the positive going direction which signifies an end of probe signal. Below, you will see a level depicted by a negative going signal. As with all other types of device like the SITRANS LG200, the larger this signal the better. We also should use the same rule of thumb as with Ultrasonics or Non Contacting Radar that the noise levels (or signal floor) is the same. (The less noisy and lower the levels of this are, the better.) In the example below, this is signified with a red dotted line (not shown in PDM).

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Many items are shown on the PDM screen. Each of these items will be documented below in the following diagrams and pictures.

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There are several simple changes that can be made if the user cannot get the device to measure as expected. For example if you know your level is incorrect for a measured or dipped level, there are a few things you can change easily to ensure that the device is looking at the correct echo: check the probe type, check the probe length (has your customer shortened the probe?), check the process connection type, and check the Dielectric setting. If you confirm that the probe type, length, and process connection are correct, then you can make a number of setting changes by adjusting just one parameter: the dielectric setting. This setting makes many internal changes like gain, thresholds and other parameters to ensure they are optimized. This setting can be very useful. For example, I will show the same level in a tank and just make a change to the dielectric setting and show what happens. So we will start with a setting of 10-100.

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We will now adjust the dielectric setting from 10-100 to 1.7 – 3 setting. Click Transfer and see what happens.

Right click on the Dielectric Range tab, and click Online.

Change the value in the dropdown menu and choose Transfer.

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The curve has changed quite dramatically. Dielectric setting 10-100 represented a lower gain or amplification than the 1.7- 3 setting. You can also see via the parameters to the right that other parameters have been changed, notably the negative threshold and sensitivity parameters. So, by adjusting this one parameter you can quickly solve an issue on site. You can of course use the negative threshold and sensitivity parameters on their own by unlocking the device from password protection and adjusting accordingly (this is only recommended when PDM is available). Single Rod Probes are usually the probe types that require the sensitivity to be adapted independently and application by application. An example is shown below where the threshold mode and sensitivity were adjusted to ensure a reliable signal from the product where no signal was seen using some standard settings. It should be noted that this application was a difficult one as the DK of the product to be measured was below the minimum for the probe/application installation.

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Also the threshold setting can be changed, but are usually left alone. Default is FIXED and choices are FIXED or CFD.

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From the above example it has be shown that Single Rod Flexible Probes (Cable) should probably be adjusted to at least a sensitivity setting of 220 or more (application/installation dependant). This may be changed in subsequent firmware updates in the future. The area marked with the red box (above) is noise generated from the mounting and is typically a function of the single rod probes. This can be taken care of (ignored) either by extending the blanking (blocking) distance and/or using negative Threshold settings. However negative threshold settings will be applied across the whole line and therefore it is necessary to see if they will affect the level echo.

Effects of changing the Negative Threshold Value.

Sample PDM screen shot of Echo Profile Screen showing the details of Thresholds, Measured Distances, and Level.

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When would you change this value? This value can be used like TVT (Time Varying Threshold) as we are familiar with in our Ultrasonics and Radar devices. TVT in quick and easy terms means that everything under the line is ignored in terms of being seen as a valid signal. However, it is fixed, linear and is not dynamic. The effects of changing this are that we will ignore everything under it looking in an upwards direction while evaluating all that go below it as an echo.

The example below shows a nice echo with an increased negative threshold level. As you can see, the line has moved downwards.

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This line is now moved downward to effectively ignore what is between it and the noise floor (similar to a TVT line that is fixed). Of course there are some effects of this: the actual Signal strength is reduced. See below.

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To make a change to these settings in PDM, you should do the following: From the PDM main window for programming (shown below), click on the Negative Threshold Amplitude tab with your RIGHT mouse button to go Online.

The following window will now display.

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Highlight the value and change to the new value needed. Remember you will be increasing this value to cancel out any noise, or to pick up on the correct echo. (Increasing the number moves the line down.) If you are unable to do this, and you see an error, you may need to open up programming mode by re-entering the password. (See Write Protection earlier in the Application Guide). For more information, visit www.siemens.com/LG200