Attributes (Cascaded DA Setpoint Determination) - 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 these modules.

Table 1. Cascaded DA Setpoint Determination Attributes

Name

Description

Default Value

Discharge Air Setpoint Indicates discharge air temperature setpoint as determined by this module based on the zone air temperature error. 13 °C (55 °F)
Discharge Air Setpoint Heating Max Indicates maximum heating DA-T setpoint. 40 °C (105 °F)
Discharge Air Setpoint Zone Satisfied Indicates minimum heating DAT setpoint and the maximum cooling DAT setpoint. 21 °C (70 °F)
Heating Absolute EWMA Effort Represents Exponentially Weighted Moving Average (EWMA). It is computed by the PID primitive and is based on the Current Present Value and the Last Present Value. It is the absolute value of the difference between the two. 0.0 %
Heating Absolute EWMA Error Represents EWMA based on the absolute value of (Setpoint - Process Variable). 0 °C (0 °F)
Heating EWMA Error Represents EWMA based on the difference of (Setpoint - Process Variable). 0 °C (0 °F)
Heating EWMA Present Value Represents EWMA of the current Present Value. It is based on the difference of (Present Value - Last Present Value). 0.0 %
Heating Percent Cmd Indicates output of the Heating Reset PID. 0.0 %
Heating Setpoint Indicates desired heating setpoint for the zone. 21 °C (72 °F)
Heating Zone Control Status Indicates zone heating PID status:
  • 0 = Normal
  • 1 = Low
  • 2 = Timing Low
  • 3 = High
  • 4 = Timing High
  • 5 = Disabled
  • 6 = Overridden
0 = Normal
Mode Indicates which state is active:
  • 0 = Off: Discharge Air Temperature (DAT) does not reset. DAT is held constant at Discharge Air Setpoint Zone Satisfied.
  • 1 = Hold: Outputs are held at the current value.
  • 2 = Htg DA-T Reset: DAT is reset between the minimum and maximum heating limits based on the control temperature and the Heating Setpoint.
0 = Off
PID Tuning Reset Causes the PID objects to reset their tuning parameters to the default based on the appropriate Process ID.
  • 0 = Normal
  • 1 = Reset 1st PID
  • 2 = Reset 2nd PID
  • 3 = Reset 3rd PID
  • 4 = Reset 4th PID
0 = Normal
Process Units Specifies the units for the PID. °C, °F
Process Variable Indicates the control temperature. Either Zone temperature or return air temperature may be connected to this input. 22 °C (70 °F)
State Represents the current module mode of operation.
  • 0 = Off: Discharge Air Temperature (DAT) does not reset. DAT is held constant at Discharge Air Setpoint Zone Satisfied.
  • 1 = Hold: Outputs are held at the current value.
  • 2 = Htg DA-T Reset: DAT is reset between the minimum and maximum heating limits based on the control temperature and the Heating Setpoint.
0 = Off