Attributes (Heating Staged Outputs with Low Limit) - 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 Heating Staged Outputs with Low Limit modules.

Table 1. Heating Staged Outputs with Low Limit Attributes

Name

Type 1

Description

Default Value

Control Band

V

Control band for the MSC.

Display Units: °C, °F

Eff Minimum Off Time

V

Minimum off time to be used by the MSC.

Display Units: Seconds

Eff Minimum On Time

V

Minimum on time to be 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

Contains the Process Variable to be used by the MSC.

Display Units: °C, °F

Heating Control Status

V

Current saturation status of the controller.

Set Name: Control Status

Heating Ramp Rate

 

Determines the time to remain in the Cold Start state (if applicable). During the cold start state, the preheat output is prevented from closing quickly to allow it to come into control without tripping the Low Limit on the unit.

20 Change per Minute

HTG-MINOFF, PH-MINOFF, or RH-MINOFF (Minimum Off Time)

 

Contains the Min Off Duration for all stages.

120 Seconds

HTG-MINON, PH-MINON, or RH-MINON (Minimum On Time)

 

Contains the Min On Duration for all stages.

120 Seconds

HTG-O, PH-O, or RH-O (Heating Percent Cmd)

V

Controls the heating device. The device is commanded from 0% to 100%.

Display Units: %

HTG-OUTSTATE, PH-OUTSTATE, or RH-OUTSTATE (State)

G, V

Current operational mode of the output controller.

Set Name: AHU Htg Staged State

Instant Shutdown

V

Contains the indication to the MSC to shut off all outputs instantly.

 

Limited Max Value

 

Defines the proportional valve position or the face and bypass damper position when the module is in the Limited Max Heating state.

100.0%

Low Limit Process Variable

 

Contains the low limit temperature process variable.

7 °C, 45 °F

Low Limit Setpoint

 

Low limit temperature setpoint.

7 °C, 45 °F

Max Capacity Fraction

 

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

1.0

Mode

 

Mode requested by State Selection.

Off

Set Name: AHU Htg Staged Out

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

PMAC Period

V

Period used by the PMAC algorithm portion of the MSC.

Display Units: Seconds

Process ID

 

Type of process that this output controller is controlling when the mode is 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. Either Zone temperature, discharge air temperature, return air temperature or preheat temperature may be connected to this input.

13 °C, 55 °F

Proof of Airflow

 

Specifies that when set to False or True, the controller operates as normal. When set to Fault, the controller transitions to an instant off state.

True

Set Name: False/True/Fault

Setpoint

 

Contains the desired setpoint for the process variable to be controlled to when the mode is 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)