Attributes (Preheat Proportional Valve with Return Water Control) - 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 Preheat Proportional Valve with Return Water Control modules.

Table 1. Preheat Proportional Valve with Return Water Control Attributes

Name

Type 1

Description

Default Value

Compensator Preheat Cmd

 

Controls the preheat valve. The valve is commanded from 0% to 100%. This output incorporates the Lead Compensator.

0.0

Display Units: %

Failsoft Value

 

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

100.0%

Flush Position

 

Defines the proportional valve position when the module is in the Water Flush state.

100.0%

Heating Control Status

V

PID status.

Normal

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

V

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

0.0%

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

G, V

Current operational mode of the output controller.

Off

Set Name: AHU Htg Valve State

Limited Max Value

 

Defines the proportional valve position when the module is in the Limited Max mode.

100.0%

Low Limit Process Variable

 

Contains the low limit temperature process variable. This input is usually the mixed air temperature or the preheat air temperature.

7 °C, 45 °F

Low Limit Proportional Band

 

Contains the range across which the valve is proportionally modulated open as the Low Limit Process Variable drops below the Low Limit Setpoint plus the Low Limit Proportional Band. This input is used only in the Remain In Control mode.

5 °C, 9 °F

Low Limit Setpoint

 

Contains the low limit temperature setpoint.

7 °C, 45 °F

Low OA Temperature Diff

 

Contains the differential for the Low OA Temperature function. When the valve is open in the Low OA Temperature Mode, the protect temperature must increase the Low OA Temperature by more than the Protect setpoint before the valve closes.

0.5 °C, 1 °F

Low OA Temperature Position

 

Defines the proportional valve position or the face and bypass damper position when the module is in the Low OA Temperature state.

100.0%

Low OA Temperature Setpoint

 

Contains the setpoint for the Low OA Temperature function. When the protect temperature is below this setpoint, the valve opens to the Low OA Temperature Position.

4 °C, 40 °F

Mode

 

Mode of operation.

Off

Set Name: AHU Htg Valve Out

OA Temperature

 

Contains the outdoor air temperature.

4 °C, 40 °F

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

Process ID

 

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. Either zone temperature, discharge air temperature, return air temperature or preheat temperature may be connected to this input.

13 °C, 55 °F

Pump OnOff

 

Controls the circulating pump.

Off

Set Name: Off/On

Setpoint

 

Contains the 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)