Ok @MaxMarschall I checked with OpenStudio team about this issue, there were some updates on dealing with ScheduleFile and ExternalFile object. I just updated the ironbug for this, and did some tests:
Ironbug.20200429.zip (288.9 KB)
20200429_ScheduleFile_Example.gh (562.0 KB)
Here is the daily schedule in csv to control system’s availability, and below is the hourly cooling results that matches the csv schedule.
Let me know if this works.