REMOTE MONITORING SYSTEM STATE MACHINE

摘要

A plurality of different types of operating systems in buildings (12) organized in geographical groups, each group having a local service office (14), are monitored at both the local offices (14) and central office (16) for the presence of performance conditions and conditions indicative of an alarm condition. The operating systems are monitored by a signal processor in a master unit (18) which receives and stores sensed parameter signals, determines transitions in the operating condition of the systems and counts the number of transitions to provide signals indicative of system performance, and also provides alarm signals on a transition to an alarm condition.