Primary States (Damper Control [VAV Supply]) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 15.0

Controller Tool Help
Product
Controls > Control Tools > Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
15.0
Revision date
2022-11-18

  • Bypass: Issue a fixed value to the Damper Percent Cmd (Shutdown, Box Flow Test, or Failsoft values).

  • Hold: Hold the Percent Cmd output at its current value.

  • Control Flow Unreliable: Adjust the Percent Cmd output using a pressure dependent mode of operation while either flow input is unreliable.

  • Control Flow Reliable: Adjust the Percent Cmd output to maintain the flow difference at the value of the Flow Differential SP.

Table 1. Damper Control (VAV Supply) Command Hierarchy

Mode

Flow Reliable

Non-Zero SP

State

Open

*

*

Bypass

Close

*

*

Bypass

Hold

*

*

Hold

Control

*

False

Bypass

False

True

Control Flow Unreliable

True

True

Control Flow Reliable

Box Flow Test

*

*

Bypass

Failsoft

*

*

Bypass