Programmed alarm call generator - compares counter contents at short periodic intervals with alarm time in read-write store

摘要

The programmed alarm call generator for a hotel etc, comprises a microprocessor, a programme store, a read-write store, containing the alarm times and the required alarm signals, a counter recording the time and an alarm source. The contents of the counter are compared at short periodic intervals with each alarm time in the read-write store and the corresponding alarm signal data supplied from the store to the alarm source upon coincidence. The alarm source uses the received data to provide secondary alarm signals supplied to signal lines leading from the call generator to each room etc.