Hi, I am new in Siemens Logo!, I have to create a program that alternates five pumps in order, but only the selected pumps can be activated, the cycle times will be between 1 day to 7 days, adjustable and the same for every pump, the following pump in the order must start before the one that is operating stops. If the pump that is operating is de-selected the following selected pump must start. Another request is that in case the energy fails the pump that was running before the failure must re-start when the energy returns and complete its duty time.

I am asking for an example or a good guidance, but in case I have to pay for the development I am willing to do it only if the program really works well, thank you, very very much

Thanks again

What if I ask to cycle four pumps in order, but only the selected ones will start? cycle time measured in days. Is it still too complex?

Hello Chantecler,

If you are looking for examples and possible solutions, then take a look at the German part of the forum. There are lots of examples and different solutions. Search under “Pumpensteuerung” or “Lastwechsel”.

Here are examples 1, example 2, example 3

Greetings Ella_68

(translated with Google)

Thank you, very much Ella_68,

I also found this on the Internet https://www.youtube.com/watch?v=V812ZnHbt48 which gave good ideas, this one is not directly expandable to four nor five pumps but got me on the right track. I already have my own program being tested in my client's site.

Thanks again, bye