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In a bus network, every station will receive all network traffic, and the traffic generated by each station has equal transmission priority. [3] A bus network forms a single network segment and collision domain. In order for nodes to share the bus, they use a medium access control technology such as carrier-sense multiple access (CSMA) or a bus ...
Four PCI Express bus card slots (from top to second from bottom: ×4, ×16, ×1 and ×16), compared to a 32-bit conventional PCI bus card slot (very bottom). In computer architecture, a bus (historically also called a data highway [1] or databus) is a communication system that transfers data between components inside a computer or between computers. [2]
EtherNet/IP – IP stands for "Industrial Protocol". An implementation of CIP, originally created by Rockwell Automation; Ethernet Powerlink – an open protocol managed by the Ethernet POWERLINK Standardization Group (EPSG). FINS, Omron's protocol for communication over several networks, including Ethernet.
In telecommunication and data transmission, serial communication is the process of sending data one bit at a time, sequentially, over a communication channel or computer bus. This is in contrast to parallel communication , where several bits are sent as a whole, on a link with several parallel channels.
Modbus or MODBUS is a client/server data communications protocol in the application layer. [1] It was originally designed for use with programmable logic controllers (PLCs), [2] but has become a de facto standard communication protocol for communication between industrial electronic devices in a wide range of buses and networks.
Token Bus was standardized by IEEE standard 802.4. It was mainly used for industrial applications. Token Bus was used by General Motors for their Manufacturing Automation Protocol (MAP) standardization effort. [4] This differs from Token Ring networks in that the endpoints of the bus do not meet to form a physical ring.
Protocols for industrial Ethernet include EtherCAT, EtherNet/IP, PROFINET, POWERLINK, SERCOS III, CC-Link IE, and Modbus TCP. [1] [2] Many industrial Ethernet protocols use a modified media access control (MAC) layer to provide low latency and determinism. [1] Some microprocessors provide industrial Ethernet support.
In some applications there is an advantage to being able to designate one station having a higher priority. Token Ring specifies an optional scheme of this sort, as does the CAN Bus, (widely used in automotive applications) – but Ethernet does not. In the Token Ring priority MAC, eight priority levels, 0–7, are used.