Hello Bob,
The Arduino ACE-100 course provide an excellent basic introduction to the Arduino Opta. Arduino likely has plans for follow up courses to explore advanced topics. Consequently, there is nothing to unlock at this time.
As we wait may I offer a few ideas:
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The page you are reading has a variety of Opta related and adjacent topics for your consideration. You may find the UDFB material useful as it allows hierarchical design of PLC code.
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Several days ago, I purchased Tom Mejer Antonsen’s “Collection of Exercises for PLC Programming”. I’m told the book provides a framework from which to explore PLC programming.
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May I point you to the leaders of the PLC community including:
Together they provide a rich introduction into the world of PLC design. All provide a down to earth understanding the real-world PLC applications.
Finally, may I leave you with a better understanding of the Opta ecosystem with this article showcasing the relationship between the Arduino Opta and Schneider Modicon PLC.
Sincerely,
APDahlen