Primary States (Damper Control with Low Limit) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 15.0

Controller Tool Help

Brand
Johnson Controls
Metasys
Product name
Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
15.0
Revision date
2022-11-18
Language
English
  • Open: Sets the output for maximum outdoor air. The Percent Cmd is set to 100%.

  • Close: Sets the output for zero outdoor air. The Percent Cmd is set to 0%.

  • Min: Sets the output for minimum outdoor air. The Percent Cmd is set to Minimum OA Pos.

  • Hold: Keeps the outputs at their current position. If the Output Overridden is true, then the Output Position input is passed to the Cooling Percent Cmd.

  • Control Econ: Adjusts the output to control the Process Variable. The Percent Cmd is adjusted between Minimum OA Pos and 100%.

  • Control Econ Limit: Adjusts the output to control the Low Limit Process Variable. The Percent Cmd is adjusted between Minimum OA Pos and 100%.

Table 1. Damper Control with Low Limit Command Hierarchy

FSCS OAD Cmd

Proof Of Airflow

Process Variable Is Reliable

Mode

PID Tuning Reset

State

Open

*

*

*

*

Open

Close

*

*

*

*

Close

Auto

*

*

Hold

Reset 1st PID

Control Econ Limit

Fault

*

*

*

Close

FALSE

*

*

*

Close

TRUE

TRUE

Close

*

Close

Open

*

Open

Min

*

Min

Hold

*

Hold

Control Econ

*

Control Econ

Control Econ Limit

*

Control Econ Limit

FALSE

*

*

Close

Table 2. Damper Control Command Hierarchy

Mode

State

Close

Close

Open

Open

Min

Min

Hold

Hold

Control Econ

Control

Control Econ Limit

Control

Table 3. Limit Control Command Hierarchy

Mode

State

Control Econ Limit

Close

Hold

Hold

Close

No Limit Control

Open

No Limit Control

Min

No Limit Control

Control Econ

No Limit Control