Analog inputs scaling

A field device is sending a 4-20 mA signal back to the PLC analog input card.

That 4-20 mA is scaled into counts. The counts are then converted in to a raw value and sent out.

What is the reason for the counts? Why not just 4-20 mA signal input -> value output?

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@wannabetech

Read these articles on PLC Scaling.

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