Buildings.Obsolete.Controls.OBC.CDL.Logical

Package with obsolete models of logical blocks

Information

Package with obsolete blocks for elementary mathematical functions for boolean variables.

Package Content

Name	Description
Timer	Timer measuring the time from the time instant where the Boolean input became true
Validation	Collection of models that validate the logical blocks of the CDL

Buildings.Obsolete.Controls.OBC.CDL.Logical.Timer

Timer measuring the time from the time instant where the Boolean input became true

Buildings.Obsolete.Controls.OBC.CDL.Logical.Timer

Information

Timer with option to accumulate time until it is reset by an input signal.

Each time the Boolean input u becomes true, the timer runs, otherwise it is dormant.

If the parameter accumulate is false, the timer is set to zero each time the input u becomes false. The value of input reset will be ignored.
If the parameter accumulate is true, the timer accumulates time, and the timer is set to zero only when the value of the input reset becomes true.

Extends from Modelica.Icons.ObsoleteModel (Icon for classes that are obsolete and will be removed in later versions).

Parameters

Type	Name	Default	Description
Boolean	accumulate	false	If true, accumulate time until Boolean input 'reset' becomes true, otherwise reset timer whenever u becomes true

Connectors

Type	Name	Description
input BooleanInput	u	Connector for signal that switches timer on if true, and off if false
input BooleanInput	reset	Connector for signal that sets timer to zero if it switches to true. The input value will be ignored if the timer does not accumulate time
output RealOutput	y	Timer output [s]

Modelica definition

block Timer "Timer measuring the time from the time instant where the Boolean input became true" extends Modelica.Icons.ObsoleteModel; parameter Boolean accumulate = false "If true, accumulate time until Boolean input 'reset' becomes true, otherwise reset timer whenever u becomes true"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u "Connector for signal that switches timer on if true, and off if false"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput reset "Connector for signal that sets timer to zero if it switches to true. The input value will be ignored if the timer does not accumulate time"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput y( final quantity="Time", final unit="s") "Timer output"; protected discrete Modelica.SIunits.Time entryTime "Time instant when u became true"; discrete Modelica.SIunits.Time yAcc "Accumulated time up to last change to true"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput reset_internal( final start=false, final fixed=true) "Internal connector"; initial equation pre(entryTime) = time; yAcc = 0; equation if not accumulate then reset_internal = true; else reset_internal = reset; end if; when u and (not edge(reset_internal)) then entryTime = time; elsewhen reset then entryTime = time; end when; when reset then yAcc = 0; elsewhen (not u) then yAcc = pre(y); end when; if not accumulate then y = if u then time - entryTime else 0.0; else y = if u then yAcc + (time - entryTime) else yAcc; end if; end Timer;