Mitsubishi Electronics ETH-1000 manual Chapter, Terminology

Chapter 7	Terminology
Implicit (I/O	Data)	Connections are established to move application-specific I/O data at regular
Messaging		intervals. These connections often are set up as one-to-many relationships in
		order to take full advantage of the producer-consumer multicast model.
		Implicit messaging uses UDP/IP resources to make multicast data transfers
		over Ethernet a reality.
Explicit Messaging		Point-to-point relationships that are established to facilitate request-response
		transactions between two nodes. These connections are general purpose in
		nature and can be used to reach any network-accessible items within a
		device. Explicit messaging connections utilize TCP/IP services to move
		messages across Ethernet.
EtherNet/IP		EtherNet/IP is the name given to the Common Industrial Protocol (CIP), as implemented
		over standard Ethernet (IEEE 802.3 and the TCP/IP protocol suite).
User Defined Data		User-defined data types allow a user to organize the data to match a machine or process.
Type		This streamlines program development and creates self-documenting code that is easier
		to maintain. A user-defined data type stores all the data related to a specific aspect of a
		system. This keeps related data together and easy to locate, regardless of its data type.
Common Industrial		The Common Industrial Protocol (CIP) is a media independent, connection-based, object-
Protocol (CIP)		oriented protocol designed for automation applications. It encompasses a comprehensive
		set of communication services for automation applications: control, safety,
		synchronization, motion, configuration and information.
Connection Object		The CIP Connection Class allocates and manages the internal resources associated with
		both I/O and Explicit Messaging Connections. The specific instance generated by the
		Connection Class is referred to as a Connection Instance or a Connection Object.
Service Object		Service is a function supported by an object and/or object class. The Service Object
		configured for a particular ICC ETH-1000 to a Mitsubishi device connection is used to
		define what data transfer functions need to be executed.

	1
	Introduction
	2
	System Overview
	3
Devices to the	Network
	4
ControlLogix PLC Project	Configuration
	5
ETH-1000	Configuration
	6
Using EtherNet/IP	Explicit Messaging

7

Terminology

7-1