.IDEAS.Controls.OBC.CDL.Logical.Timer

Information

If the Boolean input u is true, the output y is the time that has elapsed since u became true. Otherwise, y is 0. If the output y becomes greater than the threshold time t, the output passed is true. Otherwise it is false.

In the limiting case where the timer value reaches the threshold t and the input u becomes false simultaneously, the output passed remains false.

Revisions

• November 12, 2020, by Michael Wetter:
  Reformulated to remove dependency to Modelica.Units.SI.
  This is for Buildings, issue 2243.
• August 28, 2020, by Michael Wetter:
  Revised implementation to correctly deal with non-zero simulation start time, and to avoid state events.
  This is for Buildings, issue 2101.
• August 26, 2020, by Jianjun Hu:
  Removed reset boolean input and added output passed to show if the time becomes greater than threshold time.
  This is for Buildings, issue 2101.
• July 31, 2020, by Jianjun Hu:
  Fixed the reset input. This is for Buildings, issue 2056.
• November 8, 2019, by Michael Wetter:
  Revised implementation. This is for Buildings, issue 1221.
• July 23, 2018, by Jianjun Hu:
  Added conditional boolean input for cumulative time measuring. This is for Buildings, issue 1221.
• July 18, 2018, by Jianjun Hu:
  Updated implementation to output accumulated true input time. This is for Buildings, issue 1212.
• January 3, 2017, by Michael Wetter:
  First implementation, based on the implementation of the Modelica Standard Library.