Modelica.Blocks.MathBoolean.OnDelay

A rising edge of the Boolean input u gives a delayed output. A falling edge of the input is immediately given to the output.

Simulation results of a typical example with a delay time of 0.1 s is shown in the next figure.

Extends from Modelica.Blocks.Interfaces.PartialBooleanSISO_small (Partial block with a BooleanInput and a BooleanOutput signal and a small block icon).

Parameters

Connectors

Modelica definition

Type	Name	Default	Description
Time	delayTime		Delay time [s]

Type	Name	Description
input BooleanInput	u	Boolean input signal
output BooleanOutput	y	Boolean output signal

block OnDelay "Delay a rising edge of the input, but do not delay a falling edge." extends Modelica.Blocks.Interfaces.PartialBooleanSISO_small; parameter Modelica.SIunits.Time delayTime "Delay time"; protected Boolean delaySignal(start=false,fixed=true); discrete Modelica.SIunits.Time t_next; initial equation pre(u) = false; pre(t_next) = time - 1; algorithm when initial() then delaySignal := u; t_next := time - 1; elsewhen u then delaySignal := true; t_next := time + delayTime; elsewhen not u then delaySignal := false; t_next := time - 1; end when; equation if delaySignal then y = time >= t_next; else y = false; end if; end OnDelay;