Attributes (Occupied Sequencing [AHU MASD]) - 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 Occupied Sequencing (AHU MASD) module.

Table 1. Occupied Sequencing (AHU MASD) Attributes

Name

Description

Default Value

AHU-STATE (State)

Represents the current state generated by the sequence.

Satisfied

See Primary States (Occupied Sequencing [AHU MASD]).

Cooling Control Status

Value fed back from the mechanical cooling PID controller necessary for the sequencer to determine what actions to take.

Normal

Set Name: Control Status

Cooling Setpoint

Contains the setpoint the state generator attempts to control when cooling.

13 °C, 55 °F

Damper Control Status

Value fed back from the economizer PID controller necessary for the sequencer to determine what actions to take.

Normal

Set Name: Control Status

Fan Ready

Comes from the Start/Stop Sequencer and indicates that the fans and dampers have been sequenced properly

False

Fast Sequence Enabled

Indicates if a change to a Satisfied state should occur if a setpoint changes as described in the Setpoint Threshold input.

False

Free Cooling Available

Contains the output of the Economizer Availability module.

False

Heating Percent Cmd

Indicates the current command from the heating controller that operates first. This signal comes directly from the PID in the output controller module.

0.0

Display Units: %

Heating Setpoint

Contains the setpoint the state generator attempts to control when heating.

13 °C, 55 °F

Preheat Control Status

Contains the value fed back from the preheat PID controller necessary for the sequencer to determine what actions to take.

Normal

Set Name: Control Status

Process Variable

Contains the value compared to the setpoint and is used to determine whether heating or cooling is required.

13 °C, 55 °F

Reheat Control Status

Value fed back from the reheat PID controller necessary for the sequencer to determine what actions to take.

Normal

Set Name: Control Status

Setpoint Threshold

Indicates how much Cooling Setpoint must increase/Heating Setpoint must decrease to cause a change to a Satisfied state from a Cooling/Heating state.

1 °C, 2 °F

Zone Control

Contains a Boolean input that should be True when the unit is Zone Control without Cascaded DA-T setpoint reset.

False