Networks,Signals,IObyEdRed.pptVIP

Profibus fieldbus in EAAL The Profibus API set is a set of C/C++ functions provided with the Synergetic DP card software that can be embedded into a user-customizable software interface provided with CIMServer. Once compiled and linked to make a customized CIMServer version, CODE client processes can directly communicate with the Profibus-DP card for I/O data exchange. . Wago I/O modules The digital input module receives signals from digital field devices (sensors, etc). The physical connection of the WAGO module is shown. The middle two wires are for the sensor power supply. The other two wires are signal input/output and signal ground. ME 486 - Automation Networks, Signals, I/Oby Ed Red Networks Computers in a factory use Local Area Networks (LANs), ranging from feet to miles, to communicate with each other. Devices like PLCs, CNC machines, robots, data collection devices, vision systems, etc., communicate maintenance and monitoring data, schedules, process programs, and I/O. Reference site: /PennWeb/Academic/ArtsTech/CompSci/Networks/LAN-Overview/Lanover.html Network topologies Star network - Central station handlesall communications between computer stations. Ring network ? Stations are connected in continuous ring, requiring that messages be relayed between stations until the message gets to the right station. Messages must carry a station address. Bus network ? Consists of a single transmission line to which stations attached. This type is used in Ethernets, and most commonly used in factories today. Network access Star network access - central station coordinates communication Ring and bus access - two access methods: 1) token passing 2) carrier?sensed multiple access with collision detection (CSMA/CD). In the token method a token (code) is passed from station to station, with only those stations knowing the code having the right to access the message. In the CSMA/CD method each station waits until the network is clear until it s