This application function provides the Comfort heating/cooling setpoints (either the setpoint (SpTR) or the setpoint shift (SpTRShft)) for the PID controllers in the room temperature control AFs (TCtlH, TCtlC).

Inputs:

  • Absolute setpoint (SpTR) from room operator unit
  • Setpoint shift (SpTRShft) from room operator unit
  • Room temperature (TR) from room operator unit
  • Present operating mode (PrOpMod) from the room operating mode AF, ROpModDtr

Outputs:

  • TR (room temperature) displayed on room operator unit
  • SpTR or SpTRShft displayed on room operator unit

When PrOpMod = Comfort, the Comfort heating or Comfort cooling setpoint displays depending on whether the heat/cool state (HCSta) = Heating, or Cooling. If the setpoint shift (SpTRShft) is commanded by a room operator unit, then the Comfort heating or cooling setpoint is overridden by the amount configured in SpTRShft.

When PrOpMod = Economy or Protection, the Pre-Comfort heating (or cooling) setpoint displays depending on whether HCSta = Heating, or Cooling. SpTRShft has no affect during Economy or Protection.

If HCSta = Neither, SpTR displays the last value.

NOTES:
The heating/cooling setpoints for Economy and Protection, as well as the delta heating/cooling setpoint for Pre-Comfort are located in the room temperature control AFs (TCtlH, TCtlC).

The room temperature AI object (TR) owned by the room operator unit has the property Correction offset. This property can be accessed via ABT SSA (tech-op) and configured to provide an offset in the temperature reading used to control the room.

 

Configuration

BACnet Objects

Description

Object

Preloaded value

Delta cooling setpoint for pre-comfort

DSpCPcf
[STBY C DELTA]

1 [K]
2.0[°F]

Delta heating setpoint for pre-comfort

DSpHPcf
[STBY H DELTA]

1 [K]
2.0 [°F]

 

Parameters

Description

Object

Preloaded value

Operating command for energy efficiency condition trigger at automatic

1:None
2:Automatic
3:Manual

OpCmdEefAuto

2:Automatic

Operating command for energy efficiency condition trigger at manual

Enumeration (see OpCmdEefAuto)

OpCmdEefMan

1:None

Display absolute room temperature setpoint

1:Average value
2:Present value

SpTRAbsDspy

2:Present value