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called “transceiver”. The MAU may be built into the DTE or it may be a separate unit that attaches to the DTE through an AUI.
Modbus A data transfer protocol. Called Modbus/TCP when Ethernet media is used, called Modbus/RTU (or simply “Modbus”) when serial media is used.
Multicast The transmission scheme in which a limited group of multiple receivers are the intended target of a transmission.
Multicast Address A LAN group address that identifies a subset of the network nodes on a Local Area Network.
Multiple Gateway Routing The capability of an Ethernet Interface to route a received message to either the default gateway or one of additional gateways configured at the Ethernet Interface.
Name Resolution A “hidden” process that permits application programs to address network nodes using a symbolic name (Network Address Name) in lieu of a numeric IP address.
Netid The netid is the part of the IP address identifying the network on which the node resides. (See also Hostid.)
Network An arrangement of nodes and interconnecting branches.
Network Adapter The device, such as the Ethernet Interface, providing communications services for a particular network.
Network Address Name A character string that is used in lieu of an IP address. The client and/or server device uses Name Resolution to resolve this symbolic name into the actual IP address. This name represents the address on the network of a particular network adapter. Also referred to as “Adapter Name”.
Network Switch An Ethernet device that dynamically connects two communicating nodes without propagating the data to other Ethernet devices also connected to the switch.
Node The physical module that connects a node to the network. The Ethernet Interface is an example of a node. It connects a station (PLC or CNC) to a network (Factory LAN). A station may contain more than one Ethernet Interface and therefore contains more than one node.
Octet A group of 8 bits operated on as a single unit. (See also Byte.)
Path The sequence of segments and repeaters providing the connectivity between two DTEs. In CSMA/CD networks, there is one and only one path between any two DTEs.
Peer Another entity at the same level (layer) in the communication hierarchy.
Physical Address The unique physical layer address associated with a particular node on the Local Area Network (LAN). Ethernet physical addresses are typically assigned by the manufacturer. (See for comparison, Internet Address.)
Producer In Ethernet Global Data, a device (such as a PLC) that periodically produces new samples of data (data exchange). (See also Consumer, Exchange.)
Producer ID In Ethernet Global Data, a
TCP/IP Ethernet Communications for the Series 90™ PLC User's Manual– May 2002 |
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