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