A: Active function by P19.37=1, P19.37 can be used together with P05 group input terminal function 60 (Operating lever zero-point position signal) to conduct operating lever zero-point position detection. When the VFD stops, if the operating lever zero-point position signal is enabled (operating lever zeroing), timing starts. At this moment, if operating lever upward or downward running command exits, the VFD does not respond to the command, but  if P19.38  is reached, an operating lever  fault  (StC)  will be reported. If the counting time reaches P19.38, it indicates that the zero position is detected uccessfully.  The zero position signal  is released, and  the VFD responds only after being given with  the operating lever  upward/downward command. In the situation that the zero position signal is not  released, if the operating lever upward/downward command is given, an  operating lever fault  (StC)  will be reported. After the VFD stops, the operating lever zeroing starts timing andlasts until P19.38  is reached. Valid running command can be given again only when the zero position is detected successfully.