[Kevin Sevcik]

All Victors except the SC (Spin Control) versions are capable of running motors forward and reverse. PWM values* of 128-254 run a motor forward, values of 126-0 run the motor in reverse. Yes, running a motor in the opposite direction that it's turning will rapidly stop the motor. Of course it won't just stop at zero speed, it'll start turning in the opposite direction unless you put it in neutral.

Also, if a motor is turning full power full speed in one direction, and you instantly change it to full power in the opposite direction, you run a good chance of blowing a fuse or breaker somewhere. This draws a LOT of current.

*There's a deadband of 12 or so around 127 where it's still in neutral, but I can't remember the exact size. It's probably actually 134-254 and 122-0.