Attributes (Occupied Zone Sequencing [VAV]) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 16.0

Controller Tool Help

Brand
Johnson Controls
Metasys
Product name
Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
16.0
Revision date
2023-10-02
Language
English

The following table describes the attributes used by the Occupied Zone Sequencing (VAV) module.

Table 1. Occupied Zone Sequencing (VAV) Attributes

Name

Description

Default Value

Box Heating Control Status

Value fed back from the box heating controller necessary for the sequencer to determine what actions to take.

Overridden

Set Name: Control Status

Cooling Setpoint

Desired setpoint for the zone temperature when under cooling control.

23 °C, 74 °F

Fast Sequence Enabled

Specifies whether the state machine is allowed to proceed directly to Satisfied on large setpoint changes.

True

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 Priority

Contains the value that determines whether supplemental or box heat should be the first level of heat.
Note: This is a configuration input. Resulting state changes do not take place until they move through the Satisfied state.

Supplemental

Set Name: VAV Heating Priority

Heating Setpoint

Desired zone temperature when under heating control.

21 °C, 70 °F

Primary Cooling Control Status

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

Overridden

Set Name: Control Status

Setpoint Threshold

Specifies that setpoint changes larger than this value cause the state machine to proceed directly to the Satisfied state when the temperature is reliable, the Fast Sequence Enabled input is True and the change is associated with making the satisfied temperature band larger.

1 °C, 2 °F

Supp Heating Control Status

Value fed back from the supplemental heating controller necessary for the sequencer to determine what actions to take.

Overridden

Set Name: Control Status

ZNT-STATE (State)

Indicates the current operational mode of the controller.

See Primary States (Occupied Zone Sequencing [VAV]).

Satisfied

Zone Temperature

Contains the value that is to be compared to the setpoints and is used to determine whether it is necessary to proceed from the satisfied state.

22 °C, 72 °F