The following table describes the attributes used by the Flow Setpoint (VAV Dual Duct) modules.
|
Name |
Type 1 |
Description |
Default Value |
|---|---|---|---|
|
CDFLOW-ABSEFFORT, HDFLOW-ABSEFFORT, or SAFLOW-ABSEFFORT (Absolute EWMA Effort) |
Provides an EWMA based on the absolute value of (Current Present Value - Last Present Value). The PID computes this value. |
0.0 Display Units: % |
|
|
CDFLOW-ABSERROR, HDFLOW-ABSERROR, or SAFLOW-ABSERROR (Absolute EWMA Error) |
Provides an EWMA based on the Zone Cooling Error (Setpoint - Process Variable). The PID computes this value. |
0.0 Display Units: °C, °F |
|
|
CDFLOW-ERROR, HDFLOW-ERROR, or SAFLOW-ERROR (EWMA Error) |
Provides an EWMA based on the Zone Cooling Error (Setpoint - Process Variable). The PID computes this value. |
0.0 Display Units: °C, °F |
|
|
CDFLOW-EWMA, HDFLOW-EWMA, SAFLOW-EWMA (EWMA Present Value) |
Provides an EWMA of the Present Value. The PID computes this value. |
0.0 Display Units: % |
|
|
CDFLOW-OUTSTATE, HDFLOW-OUTSTATE, or SAFLOW-OUTSTATE (State) |
G, V |
Current operational state of the output controller. |
Set Name: VAV DD Flow Controller |
|
Control Status |
V |
Contains the current saturation status of the controller. |
Set Name: Control Status |
|
Deck |
Specifies the type of deck (Cold or Hot). |
Cold Set Name: Cold/Hot |
|
|
Deck Max Flow |
Contains the maximum deck flow setpoint. |
0 l/s, 0 cfm |
|
|
Deck Min Flow |
Contains the minimum deck flow setpoint. |
0 l/s, 0 cfm |
|
|
Failsoft Value |
Contains the percent of Deck Max Flow desired when mode is set to Failsoft. |
0.0% |
|
|
Flow Percent |
V |
Flow setpoint rescaled between 0 and 100 percent. 0% maps to the min flow and 100% maps to max flow. |
Display Units: % |
|
Flow Setpoint |
V |
Contains the desired Flow Setpoint. This is the setpoint for another activity, typically the Supply Damper Control module. |
0 l/s, 0 cfm |
|
Mode |
Contains the mode requested by State Selection. |
Off Set Name: VAV DD Flow Controller |
|
|
Output Overridden |
Indicates when the actual output controlled by this output is overridden by a user. |
False |
|
|
Output Position |
Provides the current Present Value of the output that this controller drives. |
0% |
|
|
PID Tuning Reset |
Causes the PID objects to reset their tuning parameters to the default based on the appropriate Process ID. |
Normal Set Name: PID Tuning Reset |
|
|
Process Units |
Specifies the units for the PID. For this particular module, °C and °F are the only two valid values. |
°C, °F Set Name: Unit |
|
|
Process Variable |
Specifies that when commanded to Control, this is the attribute that is to be controlled. Typically connected to the Zone Temperature. |
22 °C, 72 °F |
|
|
Setpoint |
Specifies that when the mode is set to Control, this is the desired setpoint to which the process variable is to be controlled. |
23 °C, 74 °F |