If we lose RC communication, the receiver if set up properly, will drop to the lowest known throttle value of ~900. This value falls bellow the THR_FS_VALUE and will trigger the autopilot to go into failsafe mode.
First the autopilot will go into short failsafe (FS_SHORT_ACTN, 0=Disabled, 1=Enabled) when it detects loss of signal for more than 1.5 sec. The default setting for short failsafe is Circle mode.
If the RC signal is regained during the short failsafe, the flight will return to auto mode.
If the loss of signal is longer than 20 sec the autopilot will go into long failsafe (FS_LONG_ACTN, 0=Disabled, 1=Enabled).
The default setting for long failsafe is RTL (Return to Launch).
Once the long failsafe (RTL mode) has been entered at the conclusion of the short failsafe the RTL mode will continue even if your RC signal is reacquired.
Warning: In firmware releases prior to 2.75 there is a bug where the short failsafe goes to RTL mode instead of circle mode potentially resulting in a repeating loop mode failure.
If we lose RC communication, the receiver if set up properly, will drop to the lowest known throttle value of ~900. This value falls bellow the THR_FS_VALUE and will trigger the autopilot to go into failsafe mode.
First the autopilot will go into short failsafe (FS_SHORT_ACTN, 0=Disabled, 1=Enabled) when it detects loss of signal for more than 1.5 sec. The default setting for short failsafe is Circle mode.
If the RC signal is regained during the short failsafe, the flight will return to auto mode.
If the loss of signal is longer than 20 sec the autopilot will go into long failsafe (FS_LONG_ACTN, 0=Disabled, 1=Enabled).
The default setting for long failsafe is RTL (Return to Launch).
Once the long failsafe (RTL mode) has been entered at the conclusion of the short failsafe the RTL mode will continue even if your RC signal is reacquired.
Warning: In firmware releases prior to 2.75 there is a bug where the short failsafe goes to RTL mode instead of circle mode potentially resulting in a repeating loop mode failure.
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