westnsa.blogg.se - 2 way traffic light plc in logixpro

To further extend, it can be used for controlling the traffic signal.

This project is a small demo to control the signals.

When both the Red Lamp and Yellow Lamp goes off, Green Lamp gets on for the 15 seconds.

When Red Lamp goes off, Yellow Lamp gets ON for the 10 seconds.

Only Red Lamp gets ON for the 5 seconds.

Step 5: If any interrupt or emergency occurred, in between, the system will be shut off for the particular duration. Step 4: The process continues by using the NC contact timer T3 which is again connected to the first rungs. red lamp (Q1) and a yellow lamp (Q2) gets OFF. After that, the time T3 is been set for 15 seconds. Step 3: When the timer T2 (NO contact) gets NC, timer T3 gets activated. So, the yellow lamp (Q2) gets ON for 10 seconds and the red lamp gets (Q1) OFF. Step 2: As soon as the timer T1 (NO contact) get NC, timer T2 gets activated. The red lamp (Q1) gets ON and it glows for 5 seconds.

This memory coil’s supply set the timer T1 for 5 seconds. Step 1: When PB1 is pressed, the memory coil gets energized by using the latching process. But they provide different addresses, features, and functions. These three (ABB, AB, and Delta) brands of PLC software has the same input and output. Let’s check the LD program on other two PLC software brands. I have already shown the PLC program on ABB software above. I have written this traffic control system program on ABB, AB and Delta compact PLC software. But, you should know the rules of writing LD program. You can write a program on the different PLC software. Running Program on Different PLC Softwares And T3 is connected to the green lamp (Q3) for the 15 seconds.T2 is connected to the yellow lamp (Q2) for the 10 seconds.T1 is connected to the red lamp (Q1) for the 5 seconds.There are three timers (T1, T2.and T3) is connecting with the three output as per the duration or time requirement. This memory depicts input or output functions (or coil). It is used for latching process and to store extra energy supply. These three lamps (Q1, Q2, and Q3) are connected with the different timers (T1, T2, and T3), respectively. And Q3 is considered as the green lamp.The Q2 is considered as the yellow lamp.

In the LD programming, there are three outputs (Q1, Q2, and Q3), considered as lamp or output coil. And PB2 is used for the stop the signal or emergency off purpose.īoth the inputs are connecting with the timers (T). The PB1 (I1) get NO (Normally Open) contact and PB2 (I2) get NC (Normally Closed) contact. In the PLC programming, the input (I) expresses as the push button (PB). Explaining each connected LD diagram components one by one.