Sin: Three-wire control; FWD: Forward running;
REV: Reverse running
3: Three-wire control 2. This mode defines Sin as
the enabling terminal, and the running command
is generated by FWD or REV, but the direction is
controlled by both FWD and REV. During
running, the Sin terminal needs to be closed, and
terminal FWD or REV generates a rising edge
signal to control the running and direction of the
VFD; the VFD needs to be stopped by
disconnecting terminal Sin.