Controls with conditions based on hydraulic parameters (e.g., tank level) do not need any alteration. Controls based on time depend on whether they are based on simulation time (time from start [of the analysis]) or clock time. Clock time controls have the advantage that they repeat, so this would be the type of control that you would use if you wanted it to apply at the same times every day for simulations longer than 24 hours. Depending on your demand variation (and the variation of other patterns) in the second and subsequent days you may need to tweak your controls for the system to operate properly (some controls might not handle different hydraulic extremes as well as they appeared to in the first 24 hours, for example). Using 24 hour patterns and clock based (and hydraulic condition based) controls is the most expedient way to running simulations that last longer than 24 hours. Note that when running an EPS run the Simulation Start Date and Start Time are important settings in the calculation options. These settings control how clock time based controls work and also how the daily and monthly multipliers for patterns work. Regards, Wayne Hartell
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