Attributes (Heat Recovery Wheel) - 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 Heat Recovery Wheel modules.

Table 1. Heat Recovery Wheel Attributes

Name

Type 1

Description

Default Value

Cooling Control Status

V

PID Status. The possible values are Normal, Overridden, Disabled, Low, Timing Low, High, and Timing High.

Normal

Set Name: Control Status

Cooling Mode

 

Desired cooling mode of operation.

Off

Set Name: AHU HR Cl EW

Heat Recovery OnOff

V

Binary signal to the Enthalpy Wheel.

Off

Set Name: Off/On

Heat Recovery Percent Cmd

V

Contains the analog signal sent to the Enthalpy Wheel.

0%

Heat Recovery Suitability

 

Indicates if the heat recovery may be used for cooling control, heating control, or unsuitable for either control. The enumeration set is Heat, Cool, or None.

None

Set Name: AHU HR Suit

Heating Control Status

V

PID Status. The possible values are Normal, Overridden, Disabled, Low, Timing Low, High, and Timing High.

Normal

Set Name: Control Status

Heating Mode

 

Desired heating mode of operation.

Off

Set Name: AHU HR Ht EW

HR-MAXOUT (Max Wheel Speed)

 

Defines the maximum wheel speed which provides maximum heat transfer.

65%

HR-OUTSTATE (State)

V, G

Indicates the current operational mode of the output controller.

Off

Set Name: AHU HR Ht EW

Limited Max Speed

 

Defines the wheel speed when the module is in the Limited Max state.

65%

Low Limit Process Variable

 

Low limit temperature process variable, normally connected to a sensor located in the exhaust duct after the Heat Recovery device.

4 °C, 39 °F

Low Limit Setpoint

 

Low limit temperature setpoint.

4 °C, 39 °F

Output Overridden

 

Indicates when the actual output that is controlled by this output controller 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 ID

 

Specifies the type of process that this output controller is controlling when the mode is T Control.

DA-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, °F

Set Name: Unit

Process Variable

 

Control temperature, and it may be connected to either Zone temperature, discharge air temperature, or exhaust air temperature. The latter signal is expected to come from a sensor in the exhaust duct upstream of the enthalpy wheel.

13 °C, 55 °F

Setpoint

 

Desired setpoint for the process variable to be controlled to when the mode is T Control.

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)