.Buildings.Obsolete.Controls.OBC.ASHRAE.G36_PR1.Generic.SetPoints.TrimAndRespond

Information

This block implements the trim and respond logic according to ASHRAE guideline G36, PART 5.A.15 (trim and respond setpoint reset logic).

The trim and respond logic shall reset setpoint within the range minSet to maxSet. When the associated device is off (uDevSta=false), the setpoint shall be iniSet. The reset logic shall be active while the associated device is proven on (uDevSta=true), starting delTim after initial device start command. When active, every time step samplePeriod, trim the setpoint by triAmo. If there are more than numIgnReq requests, respond by changing the setpoint by resAmo*(numOfReq-numIgnReq), i.e., the number of requests minus the number of ignored requests, but no more than maxRes.

• Change setpoint by triAmo;
• If numOfReq > numIgnReq, also change setpoint by resAmo*(numOfReq -numIgnReq) but no more than maxRes.

Revisions

• April 13, 2020, by Jianjun Hu:
  Corrected to delay the true initial device status. This is for #1876.
• August 28, 2019, by Jianjun Hu:
  Added assertions and corrected implementation when response amount is negative. This is for #1503.
• July 10, 2017, by Jianjun Hu:
  First implementation.