Attributes (Fan Three Speed) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 13.1

Controller Tool Help

Brand
Johnson Controls
Metasys
Product name
Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
13.1
Revision date
2019-12-04
Language
English

The following table describes the attributes used by the Fan Three Speed modules.

Table 1. Fan Three Speed Attributes

Name

Description

Default Value

Cooling Percent Cmd

Percent cooling, typically connected from the cooling output module. In Auto Low and Auto Medium Modes, the value is used to determine fan speed based on threshold values.

 

Fan OnOff

Indicates that the fan is off or on.

Set Name: Off/On

Fan OnOff 1

Contains the output for fan speed 1.

Set Name: Off/On

Fan OnOff 2

Contains the output for fan speed 2.

Set Name: Off/On

Fan OnOff 3

Contains the output for fan speed 3.

Set Name: Off/On

Fan Speed Status

Contains the feedback to zone sensor and/or other display to indicate the current control state (auto/off) and speed (off/low/medium/high) of the fan.

Set Name: Three Speed Status

FAN-OUTSTATE (State)

Current operational state of the output controller.

Set Name: Off/On/Max

See Primary States (Fan Three Speed).

Heating Percent Cmd

Contains the percent cooling, typically connected from the heating output module. In Auto Low and Auto Medium Modes, this value is used to determine fan speed based on threshold values.

 

Mode

Mode requested by State Selection.

Off

Set Name: Off/On/Max

Speed 2 Off Threshold

Used when Mode = Auto-Low to determine whether to decrease fan speed to Low (done if the larger of the cooling and heating percentages is less than or equal to this value).

30.0%

Speed 2 On Threshold

Used when Mode = Auto-Low to determine whether to increase fan speed to Medium (done if the larger of the cooling and heating percentages is greater than this value).

35.0%

Speed 3 Off Threshold

Used when Mode = Auto-Low or Auto-Medium to determine whether to decrease fan speed to Medium (done if the larger of the cooling and heating percentages is less than or equal to this value).

65.0%

Speed 3 On Threshold

Used when Mode = Auto-Low or Auto-Medium to determine whether to increase fan speed to High (done if the larger of the cooling and heating percentages is greater than this value).

70.0%

Stage Down Delay

Specifies the time that all outputs are turned off when the requested speed is decreased one stage before the next lower stage is turned on. This time allows the motor to slow down before re-engaging the motor at the lower speed. If the speed is decreased two stages (from High to Low), the outputs are held off for twice the time.

1 Second