The ON OFF 2 or 3 States Loop Controller
(Original Document)
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At a Glance
This type of branch contains only the ON OFF function with 2 or 3 states according to the selection. It is available in the process loops and 3 single loops. When this type of branch is selected, there is neither an output branch, nor a Feed forward branch.
The loop controller output is copied into the status bit STS_RAISE1 for the ON OFF 2 states loop controller and also into the status bit STS_LOWER1 for the ON OFF 3 states loop controller.
The internal variables are updated by recognizing the previous value of the command.
Block Diagram of the 2 States Loop Controller
Block diagram of the branch with an ON OFF 2 states loop controller.
Block Diagram of the 3 States Loop Controller
Block diagram of the branch with an ON OFF 3 states loop controller.