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Entry type: Application example, Entry ID: 21689394, Entry date: 07/21/2014
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Micro Automation: Distance and Level Measurement in Industrial Applications (Set 3)

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  • Associated product(s)
Automation task You would like to monitor the filling level of a storage tank and the storage tank shall be filled automatically. This application demonstrates by the following example how you can configure an automatic filling level monitoring based on LOGO! ...

Automation task
You would like to monitor the filling level of a storage tank and the storage tank shall be filled automatically. This application demonstrates by the following example how you can configure an automatic filling level monitoring based on LOGO!

When falling short of the minimal filling level (switching on limit) of the storage tank it shall be filled. When exceeding the maximal filling level (switching off limit) the filling cycle shall be stopped automatically.


Fig. 01

Automation solution
A LOGO! is installed in the automation solution. Logic module 0BA6 / 0BA7 is used as a controller. An ultrasonic sensor is used for filling level monitoring and it is connected to an analog input at the LOGO! logic module.

The voltage signal of the ultrasonic sensor is evaluated in the LOGO! control program in order to regulate the filling level.

The switching on and off limits are displayed as a numerical percentage value on the LOGO! display. The current filling level is additionally represented as a bar chart diagram.

The switching on and off limits can be configured via the LOGO! display. The modes and the filling cycle can be operated via LOGO! cursor keys.


Fig. 02

The automation solution complies the following requirements of operation:

  • Easy changing of filling level limits

  • Displaying the filling level on the LOGO! display

  • Manually switching on and off  the filling cycle

  • Automatically switching on and off  the filling cycle

  • Diagnosis messages if  filling cycle fails

Advantages
The present application offers the following advantages:

  • Reducing production downtimes by an automatic control

  • Cost efficient, simple and expandable filling level monitoring with LOGO!

  • Changing parameters via integrated integrated LOGO! display

  • Changing switching on and off limits without touching the sensor configuration

  • Displaying of diagnosis and device status via integrated LOGO! display

  • Displaying of numerical values and / or bar graphs

  • Manual control via LOGO! cursor keys

Benefits
The present application offers the following benefits:

  • Savings in time planning your configuration because the project is already done

  • Planning security by a configuration which has been successfully tested

  • Avoiding mistakes due to tested code and step-by-step instructions

  • You have the option to configure more switching thresholds e.g. for generating further alarms

  • You can use idle digital outputs of LOGO! e.g. for controlling signal lamps

Downloads

Content of Downloads

Download

Flyer 21689394_Set_3_Flyer_V31_en.pdf ( 185 KB )
Documentation 21689394_Set3_Sonar_V31_en.pdf ( 754 KB )
Code (LOGO!Soft Comfort Project) 21689394_Set3_Sonar_V30_en.zip ( 26 KB )

Further Information

Title

Entry-ID/Link

LOGO! manual manuals
LOGO! Power manual 16527051
ultrasonic sensor manual

Creation Environment
The screens and downloads in this FAQ response were created using Windows 7 and LOGO!Soft Comfort V7


Last change
Flyer, Security Notice


Security information
In order to protect plants, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial security concept. Siemens’ products and solutions constitute one element of such a concept. For more information about industrial security, please visit
http://www.siemens.com/industrialsecurity.