2020-02-17 14:22:32 +01:00
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<title>Strolch: PLC</title>
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<div class="page-header">
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<h1 class="page-title">Strolch as a PLC</h1>
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<p class="lead page-description">This page how Strolch can act as software based PLC with soft realtime.</p>
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<h2>Overview</h2>
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<p>Using Strolch as a PLC has certain advantages and disadvantages. The following is a list of advantages:</p>
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<ul>
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<li>Same programming model and language for server and PLC</li>
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<li>PLC has the same privilege handling as in Strolch</li>
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2020-03-22 14:21:54 +01:00
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<li>Simulating down to the PLC level is easily possible for easier testing of server logic</li>
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2020-02-17 14:22:32 +01:00
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</ul>
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2020-03-22 14:21:54 +01:00
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<p>Of course using the Java language as a PLC has its limitations, we have manage to use it for customers and
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are satisfied with the result. What follows is a description in how to set up your own Strolch based PLC.</p>
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2020-02-17 14:22:32 +01:00
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2020-03-24 16:27:57 +01:00
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<h2>Architecture</h2>
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<p>The Strolch PLC architecture sees the Strolch Agent as the server, managing logical devices, i.e. multiple
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sensors and actors together and thus deciding </p>
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<img class="image" src="images/Strolch-PLC-Architecture.png" alt="Strolch PLC Architecture">
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2020-03-22 14:21:54 +01:00
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<h2>Example set up</h2>
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<p>This example setup describes the movement of containers over conveyors. The conveyors have motors which can
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be started and stopped by a GPIO output pin controlled on a Raspberry Pi and each conveyor has a light
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barrier to detect the occupancy of a container and the Raspberry Pi detects this on GPIO input pins.</p>
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<p>Further at each conveyor location is a barcode reader to read the ID of a container.</p>
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<p>The general idea is that the PLC notifies a Strolch agent of changes, and only turns conveyors on, when the
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agent gives the command. Thus the agent handles business logic and the PLC controls the I/Os.</p>
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2020-03-24 16:27:57 +01:00
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<img class="image" src="images/Strolch-Plc-Example.png" alt="Strolch PLC Conveyor Example" />
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2020-02-17 14:22:32 +01:00
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<p class="text-muted">© Strolch / <a href="mailto:eitch@eitchnet.ch">Robert von Burg</a> / Hosting by
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