SAMA diagrams may show varying degrees of detail about the control strategies they document.
For example, you may see the auto/manual controls represented as separate entities in a SAMA
diagram, apart from the basic PID controller function. In the following example, we see a transfer
block (T) and two manual adjustment blocks (A) providing a human operator the ability to
separately adjust the controller’s setpoint and output (manipulated) variables, and to transfer
between automatic and manual modes:
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