I use X9D with Access and failure is the same on turning radio OFF.
To monitor what's going on on SBUS I did add Monitor in parallel to RUD Connector.
I did configure Pitch on
RX Failsafe to max (1083us)
Spirit Failsafe to neutral (1500us) and
Radio input to minimum (1932us), to see what kicks in.
Attachment:
SOXOS600-SBUS.JPG [ 183.33 KiB | Viewed 314 times ]
After turning system on. Everything works as expected. SBSU on Chanel 6 (Pitch) is moving with Stick input.
Turning Radio OFF, Pitch goes to max. Failsafe from RX is used, SBUS reads 1083.
After 1 Sec. Pitch goes to neutral, meaning Failsafe from Spirit kicks in. But SBSU still reads 1083, Failsafe Value from RX.
Why is Failsafe from Spirit used, if Failsafe from RX is sending solid valid signal?
Is there a Information on SBUS on Failsafe operation in use?
During this Radio OFF time, sometimes I see TS jumping just a tiny little bit every 4-5 Seconds, like Spirit is evaluating SBUS but not trusting it.
After powering Radio back on. 5 out of 10 times Spirit remains in Failsafe.
SBUS Monitor always reads solid 1930. Meaning Radio recovered fully and controls are back to transmitter.
But Spirit remain in Failsafe operation.
It's sometimes also possible to recover by starting Lua Spirit scripts like the log view.
Telemetry from Frsky like RSSI und RxBat is always recovered.
Hope this helps.
regards, Adrian