MP 1.2.92 build 1.1.5111.11703 (and MP1.2.91) with AMP 2.0 running AC 3.1 Hex, Windows XP SP3, German Version
Problem: THR_ACCEL_P and THR_ACCEL_I are showing way out of range data after touching Basic Pids: “Throttle Accel” Slider. Copter jumping up and down accordingly.
Details: Config/Tuning -> Basic Pids: “Throttle Accel” Slider. Changing it to value “0,5” seems to write wrong data and data ranges for THR_ACCEL_P and THR_ACCEL_I which I never touched. Instead of THR_ACCEL_P at 0,75 I got 75 (range should be 0,5 - 1,5). THR_ACCEL_I shoots up from 1,5 to 150 (normal range 0 - 3,0). The effects were quite obvious: copter jumping up and down massively as soon I switched into Alt Hold or Loiter even with Sonar disabled.
Entering the correct parameters in the “Full Parameter List” using “0,75” and “1,5” with a comma and not “0.75” with a dot did the trick to set them back to normal. After this the parameters were also shown corretly in the Basic Pids and AMP:Copter Pids again.
Interstingly enough loading an earlier parameter file in the Full Paramter List did not fix the problem.
Best Wishes,
Brad
Here are some screen shots with comments:
[attachment=4]1 Basic Pids before change Throttle Accel range 0,5 - 1,5.jpg[/attachment]
[attachment=3]2 APM copter Pids before change Throttel Accel p 0.75 I 1.5.jpg[/attachment]
[attachment=2]3 Full Para before Thr Accel I 1.5 Thr Accell P 0.75.jpg[/attachment]
[attachment=1]4 basic pids Throttl Accel 75.jpg[/attachment]
[attachment=0]5 APM Copter Pids Throttle Accel I 150.jpg[/attachment]