The working principles for L 1's optical fiber circle network(MDWS-600S1) and L 2's Ethernet network,and the data interfaces of L 1,L 2 and L 3 are introduced on the basis of the computer network technology.
This article introduces a designation of CAN/Internet gateway based on embedded real-time μC/OSII,which utilizes the 32bits microprocessor LPC2294 with 4 CAN-bus on the hardware,TJA1050T is CAN interface,RTL8019AS is the ethernet controller.
OPC Data eXchange(DX) makes it possible by defining a set of interfaces that provides interoperability and allows data exchange among devices and controllers connected to Ethernet networks using different fieldbus protocols.
The measuring channels are connected to a computer using the Ethernet technique.
This is intended to be an idealization of what happens in multiple access networks, such as the Ethernet.
The broadcast model captures the idea of a broadcast communication medium, such as the Ethernet, in which messages, if delivered, are delivered immediately and in order but not necessarily to all processes.
VME processors under VxWorks, a real time operating system, manage the fieldbus, concentrate the accelerator information and transmit it to the supervisory software through the ethernet network.
The two subsystems are connected through the Ethernet and are operated using the VxWorks real-time package.