Modelica.Blocks.MathInteger

Information

This package contains basic mathematical operations on Integer signals.

Package Content

Name	Description
MultiSwitch	Set Integer expression that is associated with the first active input signal
Sum	Sum of Integers: y = k[1]*u[1] + k[2]*u[2] + ... + k[n]*u[n]
Product	Product of Integer: y = u[1]*u[2]* ... *u[n]
TriggeredAdd	Add input to previous value of output, if rising edge of trigger port

Modelica.Blocks.MathInteger.MultiSwitch

Information

This block has a vector of Boolean input signals u[nu] and a vector of (time varying) Integer expressions expr[nu]. 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 last value is kept, if 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 input connector is a vector of Boolean input signals. When a connection line is drawn, the dimension of the input vector is enlarged by one and the connection is automatically connected to this new free index (thanks to the connectorSizing annotation).

The usage is demonstrated, e.g., in example Modelica.Blocks.Examples.IntegerNetwork1.

Parameters

Name	Description
expr[nu]	y = if u[i] then expr[i] elseif use_pre_as_default then pre(y) else y_default
y_default	Default value of output y if use_pre_as_default=false, as well as pre(y) at initial time
use_pre_as_default	= true, y holds its last value if all u[i]=false, otherwise y=y_default

Connectors

Name	Description
u[nu]	Set y = expr[i], if u[i] = true
y	Output depending on expression

Modelica.Blocks.MathInteger.Sum

Information

This blocks computes the scalar Integer output "y" as sum of the elements of the Integer input signal vector u:

y = k[1]*u[1] + k[2]*u[2] + ... k[N]*u[N];

The input connector is a vector of Integer input signals. When a connection line is drawn, the dimension of the input vector is enlarged by one and the connection is automatically connected to this new free index (thanks to the connectorSizing annotation).

The usage is demonstrated, e.g., in example Modelica.Blocks.Examples.IntegerNetwork1.

If no connection to the input connector "u" is present, the output is set to zero: y=0.

Parameters

Name	Description
k[nu]	Input gains

Connectors

Name	Description
u[nu]	Vector of Integer input signals
y	Integer output signal

Modelica.Blocks.MathInteger.Product

Information

This blocks computes the scalar Integer output "y" as product of the elements of the Integer input signal vector u:

y = u[1]*u[2]* ... *u[N];

The input connector is a vector of Integer input signals. When a connection line is drawn, the dimension of the input vector is enlarged by one and the connection is automatically connected to this new free index (thanks to the connectorSizing annotation).

The usage is demonstrated, e.g., in example Modelica.Blocks.Examples.IntegerNetwork1.

If no connection to the input connector "u" is present, the output is set to zero: y=0.

Connectors

Name	Description
u[nu]	Vector of Integer input signals
y	Integer output signal

Modelica.Blocks.MathInteger.TriggeredAdd

Information

Add input to previous value of output, if rising edge of trigger port

This block has one Integer input "u", one Boolean input "trigger", an optional Boolean input "reset", an optional Integer input "set", and an Integer output "y". The optional inputs can be activated with the "use_reset" and "use_set" flags, respectively.

The input "u" is added to the previous value of the output "y" if the "trigger" port has a rising edge. At the start of the simulation "y = y_start".

If the "reset" port is enabled, then the output "y" is reset to "set" or to "y_start" (if the "set" port is not enabled), whenever the "reset" port has a rising edge.

The usage is demonstrated, e.g., in example Modelica.Blocks.Examples.IntegerNetwork1.

Parameters

Name	Description
use_reset	=true, if reset port enabled
use_set	=true, if set port enabled and used as default value when reset
y_start	Initial and reset value of y if set port is not used

Connectors

Name	Description
u	Integer input signal
y	Integer output signal
trigger
reset
set