Primary States (Fan Supply Duct Static for UL-864-UUKL) - 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
  • Off: The fan is off when the module is in this mode of operation.

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

  • Emergency On: When the mode is Emergency S-P and the pressure sensor is not reliable, the module enters this state and turns on the fan while retaining its last value for the fan percent command.

  • Ramp: The supply fan slowly changes from its initial speed to 100% at a rate defined by the ramp rate input. This mode may be used during the Start/Stop sequence to start the fan in a controlled fashion.

  • S-P Control: The module controls the supply duct static pressure to the duct static pressure setpoint while the module is in this mode of operation. If the pressure sensor is not reliable, the fan turns off.

  • Emergency S-P Control: The module controls the supply duct static pressure to the Emergency Duct Static Pressure Setpoint while the module is in this mode of operation. If the pressure sensor is not reliable, the fan stays on at the Emergency On Percent Cmd.

  • Emergency Off: The mode turns off.

  • Hold : Holds the outputs at their current position. If the Output Overridden input is true, 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 State Output dependencies on FSCS SF Cmd, Mode, and Duct Static Pressure, and PID Tuning Reset reliability inputs.

Table 1. Fan Supply Duct Static for UL-864-UUKL Command Hierarchy

Mode

FSCS SF Cmd

Duct Static Pressure Reliable

PID Tuning Reset

State

*

Off

*

*

Off

*

On

TRUE

*

S-P Control

*

On

FALSE

*

Emergency On

Off

Auto

*

*

Off

Min

*

*

Min

Hold

*

Reset 1st PID

S-P Control

Hold

*

*

Hold

Ramp

TRUE

*

Ramp

FALSE

*

Off

S-P Control

TRUE

*

S-P Control

FALSE

*

Off

Emergency S-P Control

TRUE

*

S-P Control

FALSE

*

Emergency On

Emergency Off

*

*

Off