Primary States (Fan RF or EF BSP for UL-864-UUKL) - 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
  • Off: The fan is off when the module is in the Off mode of operation.

  • Min: The analog fan output (Return Fan Percent Cmd) is zero, and the fan control output (Return Fan OnOff) is on when the module is in the Min mode of operation.

  • BS-P Control: The return fan controls the building static pressure when the module receives the BS-P Control command. The module operates in the BS-P Control mode if the building static pressure is reliable. If the pressure sensor is unreliable, the module operates in the Failsoft state.

  • Failsoft: The return fan tracks the supply fan while in this mode of operation. Failsoft is a fault mode entered only if the pressure sensor is unreliable.

  • Emergency BS-P Control: The relief fan controls the Emergency BSP Setpoint when the module receives this command. If the PID Tuning Reset is true, the Reset Tuning input to the PID is set true causing the PID to recalculate its tuning parameters. While that is occurring, the Return Fan Percent CMD is held at its last value. The module operates in the Emergency On state if the pressure sensor is unreliable and the Emergency On Percent Cmd is issued to the Fan Percent Cmd output.

  • Emergency Off: The fan is off and the priority is set to 1 or 2 depending on the FSCS status.

  • Hold: Hold the outputs at their current position. If the Output Overridden input is true, then the Output Position input is passed to the Return Fan Percent CMD. The module operates in this state when the output priorities are not 16.

The following table describes the attributes used by the Fan RF or EF BSP for UL-864-UUKL modules.

Table 1. Fan RF or EF BSP for UL-864-UUKL Command Hierarchy

Mode

BSP Is Reliable

FSCS RF Cmd

PID Tuning Reset

State

*

*

Off

*

Off

*

TRUE

On

*

BS-P Control

*

FALSE

On

*

Emergency On

Off

*

Auto

*

Off

Min

*

Auto

*

Min

Min

*

Auto

Reset 1st PID

BS-P Control

Min

*

Auto

*

Hold

BS-P Control

TRUE

Auto

*

BS-P Control

FALSE

Auto

*

Failsoft

Emergency BS-P Control

TRUE

Auto

*

BS-P Control

FALSE

Auto

*

Emergency On

Emergency BS-P Control

*

Auto

*

Off