MultiSwitch

Set Boolean expression that is associated with the first active input signal

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

The block has a vector of Boolean input signals u[nu] and a vector of (time varying) Boolean expressions expr[:]. The output signal y is set to expr[i], if i is the first element in the input vector u that is true. If all input signals are false, y is set to parameter "y_default" or the previous value of y is kept if parameter use_pre_as_default = true:

// Conceptual equation (not valid Modelica)
i = 'first element of u[:] that is true';
y = if i==0 then (if use_pre_as_default then pre(y)
                                        else y_default)
    else expr[i];

The usage is demonstrated, e.g., in example Modelica.Blocks.Examples.BooleanNetwork1.

Parameters (3)

use_pre_as_default

Value: true

Type: Boolean

Description: Set true to hold last value as default (y_default = pre(y))

y_default

Value: false

Type: Boolean

Description: Default value of output y if all u[i] = false

nu

Value: 0

Type: Integer

Description: Number of input connections

Inputs (1)

expr

Default Value: fill(false, nu)

Type: Boolean[nu]

Description: Sets y = if u[i] then expr[i] else y_default (time varying)

Connectors (2)

u

Type: BooleanVectorInput[nu]

Description: Set y = expr[i], if u[i] = true

y

Type: BooleanOutput

Description: Output depending on expression

Used in Examples (1)

BooleanNetwork1

Modelica.Blocks.Examples

Demonstrates the usage of blocks from Modelica.Blocks.MathBoolean