Attributes (Damper Control with Low Limit) - 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 Damper Control with Low Limit module.

Table 1. Damper Control with Low Limit Attributes

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

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