Attributes (Fan Determination [VAV Parallel Temp Based]) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 16.0

Controller Tool Help
Product
Controls > Control Tools > Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
16.0
Revision date
2023-10-02

The following table describes the attributes used by the Fan Determination (VAV Parallel Temp Based) module.

Table 1. Fan Determination (VAV Parallel Temp Based) Attributes

Name

Type 1

Description

Default Value

Cooling Percent Cmd

  

Contains the current cooling command.

0.0%

Fan Off Threshold

  

Percent output required to disable the fan. This value is compared to the Cooling Percent Cmd and the Heating Percent Cmd. Both must be less than this to turn the fan off due to heating or cooling requirements.

0.1%

Fan On Threshold

  

Percent output required in order to enable the fan. This value is compared to the Cooling Percent Cmd and the Heating Percent Cmd. If either is greater than this value, the State output is on.

5.0%

FAN-STATE (State)

G, V

Contains the desired Status for the Fan.

Off

Set Name: Off/On

Heating Percent Cmd

  

Contains the current heating command.

0.0%

HTG-PURGETIME (Heating Purge Duration)

  

Specifies that when a call for heating is ended, the fan continues to operate for this period of time. Although this input can accept any value, it is connected to the timer’s duration input. The Timer clamps the duration value at its min value or its max value if the write is outside of this range.

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