Attributes (Heat Pump Staged Compressors) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 15.0

Controller Tool Help

Brand
Johnson Controls
Metasys
Product name
Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
15.0
Revision date
2022-11-18
Language
English

The following table describes the attributes used by the Heat Pump Staged Compressors modules.

Table 1. Heat Pump Staged Compressors Attributes

Name

Type 1

Description

Default Value

Action

 

Controls the action of the reversing valve. The On for Htg state energizes the reversing valve output when in heating mode.

On for Htg

Set Name: On For Htg/On For Clg

CLG-ABSEFFORT (Cooling 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: %

CLG-ABSERROR (Cooling Absolute EWMA Error)

 

Provides an EWMA based on the absolute value of (Cooling Setpoint - Process Variable). The PID computes this value.

0.0

Display Units: °C, °F

CLG-ERROR (Cooling EWMA Error)

 

Provides an EWMA based on the difference of (Cooling Setpoint - Process Variable). The PID computes this value.

0.0

Display Units: °C, °F

CLG-EWMA (Cooling EWMA Present Value)

 

Provides an EWMA of the Present Value. The PID computes this value.

0.0

Display Units: %

COMPCLG-O (Cooling Percent Cmd)

V

Contains a representative analog percent output for cooling on a scale of 0% to 100%. This typically is connected to the three speed or proportional fan output. This value does not exactly match the staged outputs due to PMAC and the status of min on and min off timers.

Display Units: %

COMPHTG-O (Heating Percent Cmd)

V

Contains a representative analog percent output for heating on a scale of 0% to 100%. This typically is connected to the three speed or proportional fan output. This value does not exactly match the staged outputs due to PMAC and the status of min on and min off timers.

Display Units: %

COMP-MINOFF (Minimum Off Time)

 

Min Off Duration for all stages.

120 Seconds

COMP-MINON (Minimum On Time)

 

Min On Duration for all stages.

120 Seconds

COMP-OUTSTATE (State)

G, V

Current operational state of the output controller.

Set Name: HP Discrete Out State

Control Band

V

Control band for the MSC.

Display Units: °C, °F

Cooling Control Status

V

Current cooling saturation status of the controller.

Set Name: Control Status

Cooling Mode

 

Cooling mode requested by State Selection.

Off

Set Name: HP Cooling Mode

Cooling Setpoint

 

Contains the desired cooling setpoint for the process variable to be controlled to when the cooling mode is set to Control.

22 °C, 72 °F

Eff Minimum Off Time

V

Specifies the minimum off time used by the MSC.

Display Units: Seconds

Eff Minimum On Time

V

Specifies the minimum on time used by the MSC.

Display Units: Seconds

Eff Process Time Const

V

Contains the effective process time constant that is used by the MSC.

Display Units: Seconds

Eff Process Variable

V

Process Variable used by the MSC.

Display Units: °C, °F

Heating Control Status

V

Current heating saturation status of the controller.

Set Name: Control Status

Heating EWMA Present Value

 

Provides an EWMA of the Present Value. The PID computes this value.

0.0

Display Units: %

Heating Mode

 

Heating mode requested by State Selection.

Off

Set Name: HP Heating Mode

Heating Setpoint

 

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

22 °C, 72 °F

HTG-ABSEFFORT (Heating 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: %

HTG-ABSERROR (Heating Absolute EWMA Error)

 

Provides an EWMA based on the absolute value of (Heating Setpoint - Process Variable). The PID computes this value.

0.0

Display Units: °C, °F

HTG-ERROR (Heating EWMA Error)

 

Provides an EWMA based on the difference of (Heating Setpoint - Process Variable). The PID computes this value.

0.0

Display Units: °C, °F

Instant Shutdown

V

Triggers the MSC to shut off all outputs instantly.

 

Max Capacity Fraction

 

Contains the ratio of the largest pulsable stage to the sum of all the stages.

1

Off Time

 

Specifies the delay in the Off state before switching the reversing valve.

6 Seconds

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%

Percent Cmd

V

Contains a representative analog percent output on a scale of 0% to 100%.

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

PMAC Period

V

Specifies the period used by the PMAC algorithm portion of the MSC.

Display Units: Seconds

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 the cooling or heating mode are set to Control, this is the variable that is controlled. This value typically is connected to the Zone Temperature.

22 °C, 72 °F

Proof of Airflow

 

Specifies that when set to Fault, the module goes to the Off state.

True

Set Name: False/True/Fault

Reversing Valve

V

Specifies the on/off command to the reversing valve.

Set Name: Off/On

System Mode

 

Current System Mode. This is used to lock out heating when in cooling only system mode, and to lock out cooling when in heating only system mode.

Auto

Set Name: System Mode

Transition Time

 

Specifies the delay before commanding on the compressor, which allows the reversing valve to switch into position.

6 Seconds

1

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