I have tried this as well, and it functions the exact same way. Once pressed it initiates the brake function and will not allow you to turn it off. It does not control the slow/fast leslie functionfunction.
I can’t fnd a way to control it. And the fact that the switch only initiates the brake function, and won’t let you turn the brake off, leads me to believe there might be a bug somewhere.
You should be able to direct your switch to the BRK (BRaKe) function – this is the one you want.
Edit: I’m confusing myself – on H9 this is called PSW (Performance SWitch), as it can be different things for different algorithms.
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