sajjad.hussain
Junior Member level 1
The traffic light controller should have 4 states in total:
The circuit diagram implemented in profilab is shown in the image given below:
I have been trying since last week and i have successfully implemented 3 states in profilab expert4.0 but i am unable to execute the 4th state. if i implement the 4th state, the whole program stops working.
the content of the ROM for my working example (for only 3 states) is:
If someone helps me with this problem and guide me what should be the contect of the ROM for first 16 locations. Regards
- at start , the green traffic light and the red footwalker light is active
- when pushbutton is pressed the yellow light of traffic lights becomes active and the red footwalker light still remains active while the timer starts for 3 seconds.
- in next state, the traffic light turns to red while the footwalker light turns to green and another timer starts for 20 seconds.
- in next state, after the timer expires the traffic light becomes yellow again and the footwalker light becomes red and the first timer runs again for 3 seconds. the program returns to its initial state after the completion.
The circuit diagram implemented in profilab is shown in the image given below:
I have been trying since last week and i have successfully implemented 3 states in profilab expert4.0 but i am unable to execute the 4th state. if i implement the 4th state, the whole program stops working.
the content of the ROM for my working example (for only 3 states) is:
If someone helps me with this problem and guide me what should be the contect of the ROM for first 16 locations. Regards