IMO as a general guide for Remote that would make sense. Some programs have only one or two frequencies and will cycle in 3-6 minutes with the default dwell of 180 seconds. For chronic issues it would make sense to me to cycle more often than 2-4 hours.
I wouldn't reduce the dwell time to make my program cycle faster. It would be more effective to share the load across multiple generators.
I'm not aware of any limit to the number of programs you can run at one time, however, you may need to consider if it makes sense to run certain programs before running other programs.
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