Micro Automation: Distance and Level Measurement in Industrial Applications (Set 3)
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.
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.
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
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
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
|Content of Downloads||
|Code (LOGO!Soft Comfort Project)|
|LOGO! Power manual||16527051|
The screens and downloads in this FAQ response were created using Windows 7 and LOGO!Soft Comfort V7
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