.Buildings.Fluid.HydronicConfigurations.Controls.PIDWithOperatingMode

Information

This block adds the following features to Buildings.Controls.OBC.CDL.Reals.PIDWithReset.

• Based on the constants defined within Buildings.Fluid.HydronicConfigurations.Controls.OperatingModes the block allows the controller to be either disabled or switched to a change-over mode.
• When the controller is disabled, the controller output is forced to y_neutral and the tracking error is zeroed out to prevent windup. Typically this neutral value should correspond to a condition that applies the minimum control effect, i.e., valves/dampers closed, VFDs at minimum speed, etc.
• When operated under the mode enabled the controller behaves exactly as Buildings.Controls.OBC.CDL.Reals.PIDWithReset. Furthermore, the controller output is reset to y_reset at enable time.
• When operated under the mode heating the controller behaves as Buildings.Controls.OBC.CDL.Reals.PIDWithReset except that the sign of the measured and set point variables is reversed so that the controller may for instance provide a heating function if it was originally configured for a cooling function. Furthermore, the controller output is reset to y_reset at the time the operating mode changes.

Revisions

• June 30, 2022, by Antoine Gautier:
  First implementation.