关键词: 现场总线, Profinet, 工业以太网, 站台门系统, 屏蔽门系统

Abstract: This paper introduces the system composition and working principles of the platform door systems, as well as two mainstream fieldbus control systems in the platform door industry of urban rail transit at home and abroad: the systems  with the first generation of fi eldbus as the core, represented by CAN-BUS or Modbus; and the systems with the second generation fi eldbus as the core, represented by Profinet industrial Ethernet. Their network composition, topology, and system advantages and disadvantages are detailed in this paper. Aiming at solving the problems of complex communication network and a large number of nodes in the existing systems, an improved scheme is proposed, which is enhancing the DCU function through integration and adopting dual-master redundancy. The scheme has good engineering applications and guiding signifi cance in the fi eld of the industrial upgrading of the platform door systems and the popularization and application of industrial Ethernet in such systems. 

Key words: fieldbus, profinet, industrial Ethernet, platform door system, platform screen door system