NetOne is referring to the fact that you cannot set the speed value in the animations editor higher than 60, even if you have 600 frames in your animation you want to be played over the duration of one second.
I'm hypothesizing the solution is to manually advance the frames via events, dividing by DT. When at regular speed, intermediate frames will be skipped, and when you set .1 timescale, you'll have your 60 fps, or 6 fps at .01 ect.