Taranis X9D+ Channel Issues in MP with Pixhawk 4 (RCx minimum is greater than trim)

ArduCopter Copter 3.6
1

I am having trouble getting my Pixhawk 4 to arm and I believe the issue is incorrect transmitter setup, but I do not know how to confirm that suspicion or fix the issue.

I have the following Prearm warnings in Mission Planner:
PreArm: RC16 minimum is greater than trim
PreArm: RC15 minimum is greater than trim
PreArm: RC14 minimum is greater than trim
PreArm: RC13 minimum is greater than trim
PreArm: RC12 minimum is greater than trim
PreArm: RC11 minimum is greater than trim
PreArm: RC10 minimum is greater than trim
PreArm: RC9 minimum is greater than trim

In my X9D+, I have the following setup:
CH1 - Aileron
CH2 - Elevator
CH3 - Throttle
CH4 - Rudder
CH5 - MAX
CH6 - SA (switch A)
CH7 - SB
CH8 - SC
CH9 - SD
CH10 - SE
CH11 - SF
CH12 - SG
CH13 - SH
CH14 - S1 (slider 1)
CH15 - S2 (slider 2)
CH16 - LS (left slider)
CH17 - RS (right slider)

When I calibrate the radio in Mission Planner, only channels 1-8 are coming through (i.e. flipping switches that are mapped to channels 9-17 gives no response in Mission Planner, while flipping the switches on the other channels does give a response).

I cannot figure out what I am missing. Help would be greatly appreciated.

Thanks!

2

What is the point in assigning those switches to all those channels?

3

It was a troubleshooting method. I was hoping that assigning switches to all the channels would allow me to calibrate them in MP.

I just found my issue though, it was a setup error on my part within the X9D+. I only had it set to output ch1-8 in the “Channel Range” parameter for my model.

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