The following table describes the attributes used by the Secondary Pump PID modules.
|
Name |
Type 1 |
Description |
Default Value |
|---|---|---|---|
|
Control Status |
V |
Indicates the current status of the module. |
Overridden Set Name: Control Status |
|
Delay |
Indicates the duration of the delay timer. |
0.0 seconds |
|
|
Direct Acting |
Signals the action of the PID (True = Direct Acting and False = Reverse Acting). Direct Acting is used in applications where an increase in the process variable causes the controller’s present value to increase. For example, a direct acting control is temperature control with a cooling coil. Reverse Acting is used in applications where an increase in the process variable causes the controller’s present value to decrease. For example, reverse acting control is temperature control with a heating coil, flow rate control, or static pressure control applications. |
False |
|
|
Mode |
Determines the operating mode of the module. |
Control Set Name: Off/Max/Control |
|
|
Output Overridden |
Indicates when the actual output controlled by this PID is overridden by a user. |
False |
|
|
Output Position |
Provides the current Present Value of the output that this controller drives. |
0% |
|
|
Percent Cmd |
V |
Provides an Analog output to control the single actuator that provides cooling or heating. |
0.0% |
|
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 ID |
Specifies the process being controlled. See the PID Pre-Processor for details. |
Pump Diff P Set Name: Process ID |
|
|
Process Range |
Indicates the magnitude of the range that the PID process variable traverses as the PID present value varies between its minimum and maximum values. You do not need to configure this attribute except for when the Process ID equals Airflow or Airflow Diff. When this occurs, configure this attribute to the designed maximum flow rate of the controlled device. For other Process ID values, the effective process range is automatically found in the standards table. |
40 psi |
|
|
Process Units |
Specifies the units for the PID. |
psi Set Name: Unit |
|
|
Process Variable |
When commanded to Control, this is the variable under control. This variable is typically connected to the Zone Temperature |
10 psi |
|
|
Setpoint |
Indicates the desired setpoint for the process variable being controlled (when commanded to Control). |
10 psi |
|
|
State |
G |
Indicates the state of the device. |
Control Set Name: Off/Max/Control |