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Input Parameter — A value from another function block, a sequential function chart (SFC), or a field device supplied to a module for use in execution.
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Output Parameter — A value calculated or triggered by the module and sent to other function blocks, SFCs, or field devices.
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Internal Read Parameter — A parameter, normally used only within a module.
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Internal Write Parameter — A parameter, normally used only within a module.
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Custom Block — A tool that enables you to add embedded or linked composites, module blocks, function blocks, and extended function blocks to your diagram.
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Physical Block — A tool that enables you to add a block that exists in a fieldbus device and automatically assign it to the device in one step.
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