The question is, if i go hardwired, how can i make the motor rotate slow Foward and reverse ??
Typically you'd set up the drive for two wire mode which menas the discrete signals are maintained rather than momentary.
You will have a stop signal (think enable), a run forward signal, and a run reverse signal. These are digital inputs to the drive, and commonly outputs from your PLC, although the stop signal may be also interrupted by other relay logic.
You will also have an analog speed reference.
You hold the drive stop input true to allow it to run, and make the forward or reverse bits true to choose a direction. When the stop input and a direction input are true, the drive will ramp to the speed reference supplied by the analog signal at the programmed accel rate.
With the default ramp stop mode, if the run forward or reverse input turns off, the drive will decelerate to zero at the programmed decel rate, as long as the stop input remains on.
If you take away the stop signal, the drive will coast to a stop.
If you want a custom accel or decel rate, then you simply ramp the analog signal as you wish.
In some cases it might be preferred to use a bipolar speed reference to control both speed and direction with an analog signal, and a single drive digital input for Run/Stop.