Thank you for explanation, that solve my same problem, with a little plc 20khz output frequency.
Your suggestion are perfetc, now the motor (BLDC,1kw, max 2500 rpm) run perfectly.
Only one question, if there are particular setup to fix for correct rotation, CW and CCW, because now, with your setup and same pulse generator, the motor run only in CW direction.. From the manual, very bad, seem not be particular setup are requestd for the rotation, in both direction.