FUNCTION_BLOCK SCDModeTM

An instance of this Function Block type provides an implementation of the Track Mode state machine defined in Annex F.3.9 of the NORSOK I-005 Standard for System Control Diagrams. This mode is used to controls whether or not the output of a CA (PID controller) is to follow a track which is given on an input terminal. Since the defined state machine just follows the track mode determined by external logic, it can be implemented by a simple copy operation from input (FT) to output (BT) on the occurrence of an REQ event.
The "OS Status Track" output shown in Figure F.18 of NORSOK I-005 is not shown on the mode control block. As described in NORSOK I-005-F.2.2.4, reporting of mode states to the OS is to be handled separately.

Enter data for the FT input variable.
Exercise the FB by clicking on the REQ event input.
Last updated: 2013-03-29.
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