I want to simulate an earthquake using a solenoid valve. The simulation should occur over a 10-second period, with the solenoid valve turning on and off in two or three intervals. Specifically, the timing should follow this pattern:

• Phase 1: 50 ms ON and 25 ms OFF.
• Phase 2: 18 ms ON and 17 ms OFF.
• Phase 3: 37 ms ON and 47 ms OFF.

All of these phases should occur within the 10-second window, with a total of 2 or 3 intervals for each phase. How can I program this in Logo to control the solenoid valve with these  on/off timings?

 thanks for  your attention.

I have provided these times only for a better understanding of the issue; what matters to me is the programming logic. 

I revised time in the question

ixo65

It is not a good form to edit a post after you have received a response.

No one will then be able to read the original text that was there at the beginning.

You're right, though this is a bug in your system that can be fixed. I have reverted the first post to the original numbers. For your convenience, you can multiply the original numbers by 10. Thank you for your help

Thanks indeed.

To address Part 2 of my previous question:

I wrote a program with your help that randomly turns the output on or off (for a maximum of 3 seconds). How can I use the Data log instruction (or any other way) to store how long the output is on?

thank you 

How can I extract data from Data log in simulation mode?