information about programmable logic controller(PLC) network topology ( star , ring ,network)?
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What exactly are you trying to do? \n\nYour ? is not very specific\n\nMany PLCs, including Z-World's, have RS-232 serial ports that can communicate with other computers.\n\nFree free to e-mail me - Chris
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Since you are asking for a lot of information, I will give you a pointer instead of typing it all in.  This should help you quite a bit.\n\nhttp://en.wikipedia.org/wiki/Network_routers#Types_of_routers\n\nGood luck,\nJeffrey
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In computer networking and telecommunications, Multiprotocol Label Switching (MPLS) is a data-carrying mechanism which emulates some properties of a circuit-switched network over a packet-switched network. MPLS operates at a OSI Model layer that is generally considered to lie between traditional definitions of Layer 2 (data link layer) and Layer 3 (network layer), and thus is often referred to as a "Layer 2.5" protocol. It was designed to provide a unified data-carrying service for both circuit-based clients and packet-switching clients which provide a datagram service model. It can be used to carry many different kinds of traffic, including IP packets, as well as native ATM, SONET, and Ethernet frames.
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This is extremely detailed to write down in an answer here. There is plenty of reference material out there. Go to http://www.cisco.com
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Simple :) chk out:\n\nhttp://www.realnetworks.com/resources/samples/embedded.html\n\nhttp://www.realnetworks.com/resources/howto/embedded/iechanges/\n\nhope it will help u :)\n\n--\nBalakumar Muthu\nhttp://i5bala.blogspot.com
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http://www.argospress.com/Resources/CommunicationsSystems/yringtopolo.htm\nPlease Click the above link to know in detail.
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Communication network protocols used for Building, Industrial and machine automation applications.\n\nBACnet - for building automation, designed by committee ASHRAE.\n\nCC-LINK, supported by Mitsubishi Electric.\n\nControlNet\n\nDeviceNet - originally by Allen-Bradley\n\nEGD (Ethernet Global Data) - General Electric Fanuc PLCs (see also SRTP)\n\nEtherNet/IP - IP stands for "Industrial Protocol" Created by Rockwell Automation.\n\nFINS, Omron's protocol for communication over several networks, including ethernet.\n\nHost Link, Omron's protocol for communication over serial links.\n\nInterbus, Phoenix Contact's protocol for communication over serial links, now part of PROFINET IO.\n\nMelsecNet/10, supported by Mitsubishi Electric.\n\nModbus\n\nModbus-NET - Modbus for Networks\n\nModbus/TCP\n\nOptomux - Serial (RS-422/485) network protocol originally developed by Opto 22 in 1982. The protocol was openly documented and over time used for industrial automation applications.\n\nProfibus - by Siemens.\n\nPROFINET IO\n\nGE SRTP - General Electric Fanuc PLCs\n\nController Area Network and CANopen\n\nIndustrial Ethernet\n\nEtherCAT\n\nLonTalk - protocol for LonWorks technology by Echelon Corporation\n\nSinec H1 - Siemens
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Advantages:\n* Share hardware such as printers e.g. 12 computers in a room, instead of 12 printers for each computer, just one is needed\n* Share software and opearting system (Multi-user licence)\n\nDifferent methods of networks are:\nRing:\nA local-area network (LAN) whose topology is a ring. That is, all of the nodes are connected in a closed loop. Messages travel around the ring, with each node reading those messages addressed to it. One of the advantages of ring networks is that they can span larger distances than other types of networks, such as bus networks, because each node regenerates messages as they pass through it. \n\n\nStar:\nA local-area network (LAN) that uses a star topology in which all nodes are connected to a central computer. The main advantages of a star network is that one malfunctioning node doesn't affect the rest of the network, and it's easy to add and remove nodes. The main disadvantage of star networks is that they require more cabling than other topologies, such as a bus or ring networks. In addition, if the central computer fails, the entire network becomes unusable. \n\n\nBus:\nA network in which all nodes are connected to a single wire (the bus) that has two endpoints. Ethernet 10Base-2 and 10Base-5 networks, for example, are bus networks. Other common network types include star networks and ring networks. ]\n\n\nMesh:\nAlso called mesh topology or a mesh network, mesh is a network topology in which devices are connected with many redundant interconnections between network nodes. In a true mesh topology every node has a connection to every other node in the network. \n\nThere are two types of mesh topologies: full mesh and partial mesh. \n\nFull mesh topology occurs when every node has a circuit connecting it to every other node in a network. Full mesh is very expensive to implement but yields the greatest amount of redundancy, so in the event that one of those nodes fails, network traffic can be directed to any of the other nodes. Full mesh is usually reserved for backbone networks. \n\nPartial mesh topology is less expensive to implement and yields less redundancy than full mesh topology. With partial mesh, some nodes are organized in a full mesh scheme but others are only connected to one or two in the network. Partial mesh topology is commonly found in peripheral networks connected to a full meshed backbone. \n\nDiagrams from http://www.webopedia.com/quick_ref/topologies.asp
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This is a networking problem - look up 'Linear Bus', 'Star' or 'Hub', 'Token Ring' and 'Fully Connected Mesh'.\n\nYou need 21 for a fully connected topology, but you could do it with far less.
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They are completely different as it was explained above. But other important difference is that a PLC could accept Analog Signals, Microcontroller is digital.
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Allen Bradley has PLC simulator software.  I believe it will simulate the usual SLC500 and micrologix line of PLCs.  As for a book, start at www.AB.com and check out their knowledge base.
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One of various network topologies. A Bus network is one in which all of the computers on the network are connected to the main wire of the network.
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www.faqs.org/ftp/rfc/pdf/rfc1230.txt.pdf \nieeexplore.ieee.org/iel1/2207/3411/00119114.pdf?arnumber=119114 \nwww.nicemice.net/eecs122/lectures/lan-token-rings.pdf.gz \n\nI did a search in google for IEEE 802.4 (Tokenbus and then did a search of the current search for pdf  Easy to do... Try it
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I found 1 here.\nhttp://katz.ws/search/embedded+systems
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http://www.lightcomputers.com/support/downloads/modems.htm\n\nUse the above link, since u was vague about the actual modem,\ni couldnt give link to your exact one, but the link lists 'em all.
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There are a few type. Serial Bus topology are computers connect in serial. the request for data are passed on to the next computer till it find the one with the data.weakness if one computer is down or out that ring will not be completed.Star topology: more versatile but take more time to trace problem if one computer is producing error. Ring topology bidirectional takes up more processing.
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Kindly go through Tennanbaum Networking book, they ask most questions from it.\n\nSome of the ques i know are:\n1.7 layers of the network\n2.TCPIP protocol\n3.cables,fibres,etc\n4.encryption and cryptography\nand other topics in the above book