2. Direct I/O vs Alias Tags vs Mapped Tags in Studio 5000


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In the first article of this series, we introduced the idea of separating physical PLC I/O from application logic.

Now we can address one of the most common questions in Allen-Bradley …

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7. PLC Addressing: Rack/Slot vs Tag-Based ( 7 of 35 )


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PLC Addressing: Rack/Slot vs Tag-Based

In a PLC system, every input, output, and internal memory location needs a way to be identified by the controller.

This identification method is called addressing.

In simple …

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9. Alias Tags: Making I/O Easier to Read


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In Studio 5000 Logix Designer, I/O modules automatically create module-defined tags.

These tags are technically correct, but they are not always easy to read.

For example:

Local:1:I.Data.0Local:1:I.Data.1Local:2:O.Data.0Local:2:O.Data.1

These tags tell you where the signal …

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