Primary States (Fan RF or EF BSP for UL-864-UUKL) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 16.0

• 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.