A building management system includes building equipment operable to affect a physical state or condition of a building, a system manager, and a cloud-based data platform. The system manager is coupled to the building equipment via a system bus and configured to obtain alarm data from the building equipment and generate a timeseries sample including the alarm data. The cloud-based data platform includes a timeseries service configured to receive the timeseries sample from the system manager, extract the alarm data from the timeseries sample, and store the alarm data as a sample of an alarm timeseries.