Attributes (Flow Setpoint [VAV Dual Duct]) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 16.0

Controller Tool Help

Brand
Johnson Controls
Metasys
Product name
Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
16.0
Revision date
2023-10-02
Language
English

The following table describes the attributes used by the Flow Setpoint (VAV Dual Duct) modules.

Table 1. Flow Setpoint (VAV Dual Duct) Attributes

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

1 C - Configuration Mode Only, G - Default Element (Generated State, if applicable), SC - Simulation and Commissioning Modes Only, V - Calculated Value (Outputs)