Question

6. Consid shown in the discharge pump to show when they are on and off. er the ladder program shown. The graph below shows a 35 second interval of e run switch is closed at 5 seconds and opened back up at 25 seconds as graph. On the graph, add a line for the heat coil, stir motor, and RUN SWITCH T4:2 HEAT COIL STIR MOTOR Timer On Delay Timer Time Base T4:2 1.0 10 TOF Timer Off Delay Timer Time Base 0.01N T4:3 500 T4:3 DN Run_Switch Heat_Coll off Stir Motor arge Pump 0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 27.5 30 32.5 35

Answer 1

When the RUN_SWITCH is turned on it will turn on both the timers T4:2 and T4:3 .and the output STR_MOTOR will be turned on . As the NC contact of timer 4:2 has been used the output HEAT_COIL will remain high for 10 seconds as after 10 seconds the timer will be on which activates T4:2 DN and turns it into NO.in between the output DISCHARGE_PUMP is on till the output T4:3 DN goes low . As T4:3 is delay off counter ( total time = base time * preset time in seconds)it will be turned on initially means turn T4:3 DN into nc and after 5 seconds it will be off making the contact no again . After the RUN_SWITCH is off all the outputs remains off as the timers are loaded with the preset values . on again pressing RUN_SWITCH it will again process again .​​​​​​​
classmate Date Page un Salitch Heat Cou Stir_Motpr 15 as 30 35 1o