OPL    OutPhaseLoss
Enables output phase loss protection.
Set to No if there is a contactor between the drive controller and the motor, or if multiple motors are used on the output of the drive controller. Also, set to No if the motor load is less than 25% of the drive controller current rating (In).
IPL    Input Phase Loss
Allows activation of the Input Phase Loss fault.
This fault is not configurable on single-phase input drive controllers (ATV58•U09M2, ATV58•U18M2). Disable IPL when operating the 208/230 Vac drive controllers with single-phase input.
tHt    ThermalProType
Defines the type of thermal protection.
- No: No motor thermal protection.
- ACL: Self-cooled motor. The drive controller takes into account a derating as a function of the rotation frequency.
- FCL: Force-cooled motor. The drive controller does not take into account a derating as a function of the rotation frequency. No - ACL - FCL    ACL
Notes:

    OPL (OutPhaseLoss): It is important to configure this parameter correctly based on the motor and drive controller setup to ensure proper protection and operation.
    IPL (Input Phase Loss): Be cautious when disabling this feature, as it can lead to unprotected operation under certain conditions.
    tHt (ThermalProType): Choose the appropriate thermal protection type based on the cooling method of the motor to prevent overheating.

LFL    LossFollower
Allows activation of a loss of 4–20 mA follower fault. This fault can only be configured if the minimum and maximum reference parameters for AI2 (CrL and CrH) are greater than 3 mA. If CrL > CrH, LFL is automatically set to Yes.
Choices:
- No: Disabled
- Yes: Immediate fault
- STT: Stop without fault, restart on return of signal
- LSF: Stop followed by fault signal from R1 and LFF display on the keypad
- LFF: Run at the preset speed set by the LFF parameter
- RLS: Run at last speed on loss of follower without fault. Follow analog input upon return of analog signal. STT - LSF - LFF - RLS   
LFF    4-20 Flt Spd
Pre-set speed in the event of the loss of the 4–20 mA signal. 0–HSP    0
FLr    Catch On Fly
Allows a smooth restart after:
- Brief loss of input power
- Fault reset or automatic restart
- Freewheel stop or DC injection braking with a logic input
- Momentary interruption of the drive controller output
If relay R2 is assigned to the Brake Logic function, FLr will always be set to No.
Notes:

    LFL (LossFollower): Configuring this parameter is crucial for applications that rely on a 4–20 mA signal for speed reference. It determines the drive's response to a loss of this signal.
    LFF (4-20 Flt Spd): This parameter sets the speed at which the drive will operate in the event of a loss of the 4–20 mA signal.
    FLr (Catch On Fly): Enabling this feature allows the drive to restart smoothly after certain types of interruptions, ensuring minimal downtime and reducing mechanical stress.


StP    Cont. Stop Controlled stop upon loss of input phase. This function is only operational if the IPL parameter (Input Phase Loss) is set to No. If IPL is set to Yes, leave StP set to No. Choices:
- No: Loss of input phase causes drive controller to trip
- MMS: Maintenance of DC bus
- FRP: Following a ramp No - MMS - FRP    No
Sdd    RampNotFoll Locks the drive controller if a speed error is detected (difference between the stator frequency and the measured speed). This function can be accessed if feedback via tachogenerator or pulse generator is programmed.    Yes - No    No
EPL    External fault
Determines the response to an external fault.
- Yes: Immediate fault
- Stt: Stop according to Stt setting    Yes - Stt    -
Notes:

    StP (Cont. Stop): Configuring this parameter allows for a controlled stop of the drive in case of a loss of input phase, which can help in preventing sudden stops and reducing mechanical stress.
    Sdd (RampNotFoll): This parameter is useful for applications where precise speed control is required, as it allows the drive to lock if there is a discrepancy between the commanded and actual speeds.
    EPL (External fault): This parameter determines how the drive responds to external faults, allowing for immediate stopping or stopping according to a predefined setting.