Problems getting Rx Failsafe to trigger RTL

@wkf94025 wrote:

I am bringing up ArduPlane 3.6 latest on PixFalcon, using Mission Planner latest. Radio is Futaba 14SG and Rx is R7008SB. Radio and Rx have good failsafe programming abilities, and I have set channel positions for all 14 channels (via good radio interface) in the event of Tx/Rx loss or Rx low battery. What I want is all channels in "neutral" state except mode switch, which I want to go RTL. Ch6 is my flight mode switch, and lowest value (-100 on servo display on radio) is programmed to be RTL via MP setup. When system is live and connected via USB to MP, I turn off radio, and I don't see flight controller go into RTL. Below are servo status screens as displayed by MP. First screen shot is with radio on, second is with radio off. note that Ch5 and Ch6 inputs change, but outputs (going to flight controller via SBus) do not. What am I doing wrong?

Kelly

EDIT: I have programmed throttle failsafe, and it appears to work, but I still don't understand why the Rx's command to output min value on ch6 isn't triggering RTL flight mode.

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Channels with radio on.jpg1163x809 59.5 KB

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Channels with radio off.jpg1163x809 59.7 KB

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