MVD – Motorized valve drive

Block SymbolLicensing group: STANDARD

Function Description
The MVD block simulates a servo valve. The UP (DN) input is a binary command for opening (closing) the valve at a constant speed $1 ∕ tv$ , where tv is a parameter of the block. The opening (closing) continues for $UP = on$ ( $DN = on$ ) until the full open $y = hilim$ (full closed $y = lolim$ ) position is reached. The full open (full closed) position is signalized by the end switch HS (LS). The initial position at start-up is $y = y0$ . If $UP = DN = on$ or $UP = DN = off$ , then the position of the valve remains unchanged (neither opening nor closing).

This block propagates the signal quality. More information can be found in the 1.4 section.

Input

UP	Open	Bool
DN	Close	Bool

Parameter

y0	Initial valve position	Double (F64)
tv	Transition time [s] $⊙$ 10.0	Double (F64)
hilim	Upper limit position (open) $⊙$ 1.0	Double (F64)
lolim	Lower limit position (closed)	Double (F64)

Output

y	Valve position	Double (F64)
HS	Upper end switch	Bool
LS	Lower end switch	Bool

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