generates a rising edge signal, then the VFD starts
to run in the direction set by the state of terminal
REV; the VFD needs to be stopped by
disconnecting terminal Sin.
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.