FS_THR_VALUE causes PreArm check error even though throttle is higher than FS_THR_VALUE

ArduCopter Copter 4.0
1

In case of ArduCopter, changing FS_THR_VALUE from 975 to 995, it causes PreArm check error even though throttle is 1030 on SITL.
However, in ArduPlane, following operation was okay.

  • param set THR_FS_VALUE 1100
  • rc 3 1110
  • arm throttle <- okay

What makes this different between ArduCopter and ArduPlane?
Thanks.

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2

I have also noticed this in ArduCopter where my throttle was at 980-ish and the FS value was set to 975 - resulted in PreArm check. Lowered the FS value to 950 and was good to go.

3

Thanks for sharing your experience.
Did you use a real RC transmitter?

4

Yeah. I am using a FrSky Taranis QX7S transmitter and an X8R receiver.

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