Skip to content

Reformulated initialization of CDL.Logical.Latch #2065

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
mwetter merged 1 commit into from
Nov 4, 2025
Merged

Reformulated initialization of CDL.Logical.Latch #2065

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
14 changes: 10 additions & 4 deletions IBPSA/Controls/OBC/CDL/Logical/Latch.mo
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -10,10 +10,11 @@ block Latch
IBPSA.Controls.OBC.CDL.Interfaces.BooleanOutput y
"Output with latched signal"
annotation (Placement(transformation(extent={{100,-20},{140,20}})));

initial equation
y = not clr and u;
equation
when initial() then
y=not clr and u;
elsewhen {clr, u} then
when {clr, u} then
y=not clr and u;
end when;
annotation (
Expand Down Expand Up @@ -118,6 +119,11 @@ At initial time, if <code>clr = false</code>, then the output will be
revisions="<html>
<ul>
<li>
November 3, 2025, by Michael Wetter:<br/>
Reformulated initialization to enable translation of system model with this block in OpenModelica.<br/>
This is for <a href=\"https://github.com/ibpsa/modelica-ibpsa/issues/2064\">IBPSA, issue 2064</a>.
</li>
<li>
April 15, 2024, by Antoine Gautier:<br/>
Simplified the implementation.<br/>
This is for <a href=\"https://github.com/lbl-srg/modelica-buildings/issues/3796\">Buildings, issue 3796</a>.
Expand All @@ -135,7 +141,7 @@ Simplified implementation, and made model work with OpenModelica.
<li>
April 4, 2019, by Jianjun Hu:<br/>
Corrected implementation that causes wrong output at initial stage.
This is for <a href=\"https://github.com/ibpsa/modelica-ibpsa/issues/1402\">Buildings, issue 1402</a>.
This is for <a href=\"https://github.com/lbl-srg/modelica-buildings/issues/1402\">Buildings, issue 1402</a>.
</li>
<li>
December 1, 2017, by Michael Wetter:<br/>
Expand Down