OMER - 2

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OMER - 2

• Implementing Function Block Adapters

Torsten Heverhagen, Rudolf Tracht Automation and
Control, University of Essen, Germany
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Overview

• Outline of an example scenario
• Introducing a Function Block Adapter
• The FBA - Language
• Implementation and Execution Issues
• Summary and Outlook

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Picture of the Assembly Line
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The considered Part of the Assembly Line
Programmable Logic Controller Environment IEC
61131-3
transport system
Industrial PC Environment UML-RT
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The Function Block - MyFB
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Sequence Diagram for the Scenario
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Introducing the Function Block Adapter Class
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Extending a UML-RT Structure Diagram
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Behavior of Function Block Adapters
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Execution Semantics
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Hardware Solutions
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Component and Deployment View
MySystem.EXE
MyFBA.SCL
MyFBA.cpp
MyS7Project
MyFB.SCL
MyCapsule.cpp
IPC
PLC
PROFIBUS
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Synchronization
IPC-Part of the FBA
PLC-Part of the FBA
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Summary and Outlook

• Function Block Adapters are introduced into the
  design model of a system
• Connecting PLCs and Industrial PCs can be done in
  very different hardware environments ?
  independence of implementation issues is
  important
• Implementation models are more structured when
  using FBAs for the design
• Development of a formal semantic is an ongoing
  work

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Subchart for a FB-Signal
C false sig2.data D SendSync (port1,
sig2, sig3, 60s)
wait
sig3 / C true
wait
after 1ms / C false