Attributes (2 Pipe Proportional Valve 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 2 Pipe Proportional Valve with Low Limit modules.

Table 1. 2 Pipe Proportional Valve with Low Limit Attributes

Name

Type 1

Description

Default Value

Compensator Valve Cmd

 

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

0.0

Display Units: %

Cooling Control Status

V

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

Normal

Set Name: Control Status

Cooling Mode

 

Indicates which cooling mode is active

Off

Set Name: AHU Common Valve Out

Cooling Setpoint

 

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

13 °C, 55 °F

Failsoft Cooling Value

 

Defines the proportional valve position when the module is cooling and in the Failsoft mode.

100%

Failsoft Heating Value

 

Defines the proportional valve position when the module is heating and in the Failsoft mode.

100%

Flush Position

 

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

100%

HC-OUTSTATE (State)

V, G

Indicates the current operational mode of the output controller.

Off

Set Name: AHU 2 Pipe Htg Valve State

Heating Control Status

V

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

Normal

Set Name: Control Status

Heating Mode

 

Indicates which heating mode is active.

Off

Set Name: AHU 2 Pipe Htg Valve Out

Heating Setpoint

 

Desired heating setpoint for the process variable to be controlled to when the Heating Mode is T Control.

13 °C, 55 °F

Limited Max Cooling Value

 

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

100%

Limited Max Heating Value

 

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

100%

Low Limit Process Variable

 

Contains the low limit temperature process variable. This input usually is 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

 

Low limit temperature setpoint.

7 °C, 45 °F

Low OA Temperature Diff

 

Contains the differential for the Low OA Temperature function. Once the valve has been opened to protect the coil, the protect temperature must increase Low OA Temperature Diff more than the Protect setpoint before the valve can close.

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%

Low OA Temperature Setpoint

 

Specifies that when the protect temperature is below this setpoint, the valve is opened.

4 °C, 40 °F

OA Temperature

 

Specifies that the module supports a Low Temperature response where the valve may be opened if OA Temperature drops below a defined setpoint. This input is used for the Low OA Temperature input 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

 

Determines the type of process that this output controller controls 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. Zone temperature, discharge air temperature, return air temperature, or preheat temperature may be connected to this input.

13 °C, 55 °F

Pump OnOff

V

Controls the circulating pump.

Off

Set Name: Off/On

SummerWinter

 

Used to determine if the module should heat or cool. If the input is Summer, cooling is allowed, and heating is unavailable. If the input is Winter, heating is allowed, and cooling is unavailable.

Winter

Set Name: Summer/Winter

Valve Percent Cmd

V

Used to control the single actuator that is modulating the valve.

0%

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