Using PLC to realize any of the input signal frequency
Frequency pulse signal applied on the X0 side, in the first pulse arrives, a scanning cycle pulse M100, M100 normally open camp, closed a scanning cycle. Determine the condition that Y0 Y0 State set to 0, M100 set to 1.
Y0 in the conditions of work in two branches, 1th slip roads connecting, disconnect 2nd branch, Y0 reset 1.
First pulse comes after a scan cycle, M100 for 0, Y0 reset 1, Y0 in such conditions, the second slip road keep Y0 reset 1.
When the second pulse arrives, a single scan cycle pulse M100, Y0 reset 1, M100 is set to 1, this makes Y0 changed its status from 1 both set to 0.
Second pulse comes after a scan cycle, 0 and M100 Y0 reset set to 0 until the third when it comes to scanning Y0 and M100 and exactly the same when it comes to first pulse, Y0 will repeat the procedure discussed in front of state changes.
Through the above analysis, the X0 sent two pulses, Y0 produces a pulse, complete the input signal frequency
PLC ONE 