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Entry type: Application example Entry ID: 98754978, Entry date: 08/20/2014
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Gravimetric level measurement with SIWAREX U in the PCS 7 environment

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Task Dosing and weighing operations are often required in process automation. Different methods are used depending on the requirements of the process. ...

Task
Dosing and weighing operations are often required in process automation. Different methods are used depending on the requirements of the process.
Each method requires electronic weighing systems that vary according to the required task.
The SIWAREX FTA and SIWAREX U have been approved for use in the PCS 7 environment as an electronic weighing system.
In the process industry, a common use of the electronic weighing system is the gravimetric level measurement of a storage silo.
The gravimetric level measurement should be, as much as possible:

  • precise enough
  • fast

Solution
This Application Example allows us to describe the application of a gravimetric level measurement in the PCS 7 environment. The level of a storage silo should be monitored during the process.
In this process, the following requirements are imposed on the solution:

  • The level of the storage silo is detected gravimetrically (by weight), and transmitted to the control system
  • The HIGH and LOW limits are defined in the AS and are evaluated
  • Display of the current level locally by means of a simple display
  • Zero setting of the scale, e.g. in case of contamination

The current Application Example provides a template that comprises all typical components, their control system and the necessary logic.

 

Customer benefits
The following configuration example enables you to significantly reduce your engineering effort when using PCS 7 standard agents while improving performance. You can use this solution for both new configurations as well as for integration into existing projects. The required hardware and software products are all made ​​by Siemens and guarantee the compatibility, actuality and upgrade options you are accustomed to.

When using the SIWAREX U - Advanced Process Library you also get the following benefits:

  • A reduction of the knowledge necessary to develop applications
  • A decrease in the configuration effort
  • Flexible installation and customization through reusability of the program structures used
  • Guaranteed Siemens support
  • Standardized and tested solutions
  • Engineering in a familiar PCS 7 environment
  • Library module with online help (F1) in German and English
  • Setup in German and English

Validity
SIWAREX U - Advanced Process Library
SIMATIC PCS 7 from V8.0 Update 1

Downloads

Content of downloads

Download

Documentation "Gravimetric level measurement with SIWAREX U in the PCS 7 environment"
  • Description of the application development in the PCS 7 environment
98754978_PCS7_SIWAREX_U_en.pdf ( 785 KB )
PCS 7 Example project for PCS 7 V8.0 SP2
  • Contains technical functions for the communication between SIWAREX U and AS
  • Contains SCL source files for the data conversion needed for the communication between SIWAREX U and AS
 Registrierung notwendig

Further information

Title

Link

Manual "SIWAREX U PCS 7 Advanced Process Library" Entry ID:
86536965
SIWAREX U - "Universal weighing module for SIMATIC S7 300 and ET 200M (MLFB 7MH4950-XXXX)" Entry ID:
28392477
Application Example "Compound Dosing with SIWAREX FTA in the PCS 7 environment" Entry ID
98754973

 

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