LogixPro Silo Simulation Help

I am a Journeyman Electrician that is currently enrolled in school trying to expand my possibilities. I need help with one of the questions in the PLC book released by Petruzella.

Modify the continuous filling Silo simulation program. The modification calls for:
- A 2 second time delay period preceding the filling of the box after the conveyor has stopped.
- A 4 second time delay period preceding the starting of the conveyor after the box is filled.

I have the 4 second timer installed and it works, I have been messing with this problem for about 3 hours trying different combination's and instructions, I can seem to get the 2 second timer to work properly. Could someone help. I'm looking for any suggestions I'm super frustrated!

Answer

Here is the answer for those who didn't know.

Thanks for posting that! Did it take the full month to figure out?

Here is another version.

Honga said:

Thanks for posting that! Did it take the full month to figure out?

Click to expand...

Not quite...close lol Good Times!

My Solution to Silo Simulation - Exercise #3

Hey guys,

I'm pretty new to PLC programming. I started last week and im teaching my self as I will be needing the skills later in my apprenticeship. This is my Solution to Silo Simulation - Exercise #3. I'm pretty happy with it but if any one has a more elegant solution i'd love to see it.

Cheers

This video shows one way to come up with a program by looking at it as a state machine:

http://www.youtube.com/watch?v=rCa_U6YATTA