The following table describes the attributes used by the Damper Control with Low Limit module.
|
Name |
Type 1 |
Description |
Default Value |
|---|---|---|---|
|
Control Status |
V |
Indicates the current status of the controller for damper control. |
Set Name: Control Status |
|
FSCS OAD Command |
Specifies the position of the OA damper when it is not Auto. When the input is set to Open or Close, the mode input is ignored. |
||
|
Low Limit Process ID |
Indicates the process type that is represented by the Low Limit Process Variable. |
DA-T Set Name: Process ID |
|
|
Low Limit Process Variable |
Specifies that when Mode is Control Econ Limit, this is the variable that is to be controlled. For the Heat Pump this is typically the Discharge Air Temperature. For the Unit Ventilator this is typically the Zone Temperature. |
20 °C, 68 °F |
|
|
Low Limit Setpoint |
Contains the desired setpoint for the process variable to be controlled to when the mode is Control Limit. |
20 °C, 68 °F |
|
|
MAD-ABSEFFORT (Economizer 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: % |
|
|
MAD-ABSERROR (Economizer Absolute EWMA Error) |
Provides an EWMA based on the absolute value of the Zone Cooling Error (Cooling Setpoint - Process Variable). The PID computes this value. |
0.0 Display Units: °C, °F |
|
|
MAD-ERROR (Economizer EWMA Error) |
Provides an EWMA based on the Zone Cooling Error (Cooling Setpoint - Process Variable). The PID computes this value. |
0.0 Display Units: °C, °F |
|
|
MAD-EWMA (Economizer EWMA Present Value) |
Provides an EWMA of the Present Value. The PID computes this value. |
0.0 Display Units: % |
|
|
MAD-OUTSTATE (State) |
V, G |
Indicates the current operational mode of the output controller. |
Set Name: COM Damper Control Mode |
|
Minimum OA Position |
Contains the desired minimum for the Percent Cmd. |
10.0% |
|
|
Mode |
Indicates the desired state. |
Close Set Name: COM Damper Control Mode |
|
|
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. |
0.0% |
|
|
Percent Cmd |
V |
Used to control the single actuator that is modulating the OA Damper. |
Display Units: % |
|
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 ID |
Indicates the process type that is represented by the Process Variable. |
ZN-T Set Name: Process ID |
|
|
Process Units |
Specifies the units for the PID. For this particular module, °C and °F are the only two valid values. |
°C Set Name: Unit |
|
|
Process Variable |
Specifies that when Mode is Control Econ, this is the variable that is to be controlled. For the Heat Pump, this is typically the Zone Temperature. For the Unit Ventilator, this is typically the Mixed Air Temperature. |
13 °C, 55 °F |
|
|
Proof of Airflow |
Specifies that when set to True, the controller operates as normal. When set to False or Fault, the controller transitions to the close state. |
True |
|
|
Setpoint |
Mixed Air Temperature setpoint for Unit Ventilator and Zone Temperature Setpoint for Heat Pump. |
13 °C, 55 °F |