MVD – Motorized valve drive

Block SymbolLicensing group: STANDARD
PIC

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 1tv, 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).

Inputs

UP

Open

bool

DN

Close

bool

Outputs

y

Valve position

double

HS

Upper end switch

bool

LS

Lower end switch

bool

Parameters

y0

Initial valve position

double

tv

Time required for transition between y = 0 and y = 1 [s]  10.0

double

hilim

Upper limit position (open)  1.0

double

lolim

Lower limit position (closed)

double

2019 © REX Controls s.r.o., www.rexygen.com