How can I model a 48 hr pump Pattern using water cad

Mohamamad,

Based on your post it looks like your pump On/Off schedule is based on a clock time. What you could do is create your controls to be based on "Time from Start", which is similar to clock time, but just based on the time from start of the simulation.

The first two controls for day one would look as follows:

1. IF Time From Start >= 6.000 hours And Time From Start <= 10.000 hours THEN Pump-1 Pump Status = On

2. IF Time From Start > 10.00 hours And Time From Start <= 14.000 hours THEN Pump-1 Pump Status = Off

The first two controls for day two would look as follows:

1. IF Time From Start >= 30.00 hours And Time From Start <= 34.00 hours THEN Pump-1 Pump Status = On

2. IF Time From Start > 34.00 hours And Time From Start <= 38.000 hours THEN Pump-1 Pump Status = Off

If you need to know how to create controls you can refer to this wiki solution:

communities.bentley.com/.../2567.creating-controls-conditions-actions-and-control-sets-tn

For you tank elevation or level controls here is what you should do in order to create a high or low level control:

If your tank maximum is at an elevation of 90 ft. you might want to set your pump to shut down at 89.9 ft. (just below the maximum elevation) or if your tank empties at a level of 80 ft. you might set your pump control to shut down at 80.1 ft.)

And an example control would look like this:

IF tank T-1 Elevation >= 89.9 ft. THEN pump P-1 STATUS = OFF

The reason you'd do this is to prevent the built in altitude valve from triggering and closing the adjacent pipe to the tank. This is described in more detail in the wiki below:

communities.bentley.com/.../13135.what-happens-when-a-tank-becomes-empty-or-full

You'd have to decide when to have the pump control turn the pump back on based on the data that you have for what levels to keep your tank between. That might be just below the maximum elevation of the tank and right above the minimum elevation of the tank, but that varies from system to system.

Regards,
Mark

Thank you MPachlhofer !

It works with the controls but for the set times only i.e. for the maximum time from start ( which is in my example 48 hrs) how can it repeat the cycle ( 1st and 2nd day ) for a unlimited duration ( let say 300 hrs).

Thank you MPachlhofer !

It works with the controls but for the set times only i.e. for the maximum time from start ( which is in my example 48 hrs) how can it repeat the cycle ( 1st and 2nd day ) for a unlimited duration ( let say 300 hrs).

Regards,

In my testing, a pump pattern can extend to 48 hours and will repeat. See example below.

If you want to use controls instead, you could incorporate a variable using a "dummy" pipe that you close and open, similar to what you see in this article. Basically day 1's controls would include a condition of the pipe being open, and then have an action for the last control of the day to close the pipe, then day 2's controls would have a condition of the pipe being closed and have an action for the last control of that day to open the pipe.