Attributes (Heat Recovery Low Limit Sequencing) - 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 Heat Recovery Low Limit Sequencing module.

Table 1. Heat Recovery Low Limit Sequencing Attributes

Name

Description

Default Value

Delay

When Heat Recovery Modulated is False, this input defines the amount of time the Low Limit Temperature must be greater than the Low Limit Temperature Setpoint before the unit can return to the T Control state.

120 Seconds

Heat Recovery Control Status

Contains the value fed back from the output controller PID. This is needed for the sequencer to determine what actions to take.

Normal

Set Name: Control Status

Heat Recovery Modulated

Contains a configuration input used to tell the state machine if the heat recovery is modulated or not. True means modulated, and False means not modulated.

False

HRLL-STATE (State)

Represents the current operational mode of the state generator.

T Control

See Primary States (Heat Recovery Low Limit Sequencing).

Low Limit Process Variable

Contains the value that is compared to the limit setpoint and used to determine whether it is necessary to switch from T Control to LL-T Control.

4 °C, 39 °F

Low Limit Setpoint

Contains the limit setpoint used to determine whether it is necessary to switch from T Control to LL-T Control.

4 °C, 39 °F