Quick Help when there is a Jam - Elevator and Escalator Monitoring at the Hamburger Hochbahn
	If you are stuck in an elevator in Hamburg, help is not far behind - provided you are in one of the 39 underground railway stations connected to the powerful elevator and escalator monitoring system of the Hamburger Hochbahn AG. 143 SIMATIC S7-200 devices are integrated in a PROFIBUS and ATM network that was configured by the WinCC Professional Grey Logix of Flensburg. Their data is combined on a central server, where it is analyzed, archived and processed for the operations management system by WinCC.
	Download of case study, approx. 0.5 MB, published in GO 3/2001