Timer may constitute a pulse generator with two timers generate a pulse duty cycle of the signal frequency can be set. When the input I0.0 is 1, Output Q0.0 is 0 or 1 alternatelyPeriodic pulse signal for 3s, the pulse width is 1s.

When X0 is turned on, Y0 bright lights;After 5s,Y0 lights off,Y1 bright lights;After 5s,Y1 lights off,Y2 bright lights,After another 5s,Y2 lights off,Y0 bright lights,Cycle through this sequence

Oscillation circuit analysisX0 turns T1 coil excited,4s after T1 delay normally open contact closure,While T2, Y1 coil excited, Y1 output.After T2 coil excited 2s produce a series of actions in the following order (note the timing chart corresponding analysis). ①T2 normally closed contacts disconnect② make T1 energized coil,③ T1 coil power loss and enable T1 normally … Continue reading PLC oscillation circuit Ladder Logic

Enter Ⅹ0 termination without delay self-locking button opens the circuit Ladder Logic.When the input terminal is turned Ⅹ0, R0 internal relay coil is turned on, its normally open contact closure output Y0 R0 is turned on, and the timer T0 start time, the delay 5s, T0 normally closed contacts open, the output Y0 is OFF … Continue reading PLC off delay circuit Ladder Logic

Input Ⅹ0, X1 is not connected with self-locking button controlled device connected to the output terminal Y0. When the input signal is turned Ⅹ0 terminal, enter the relay coil Ⅹ0 turned on, its normally open contact Ⅹ0 closed, internal relay R0 is turned on, its normally open contact closure R0, ON timer T0, T0 is set … Continue reading PLC ON delay circuit Ladder Logic