Language Objects and IODDTs of Ethernet Communication

General

communication has the following :

T_COM_ETH_BMX: specific to modules with Ethernet communication

IODDTs are predefined by the manufacturer and contain input/output language objects belonging to the channel of an application-specific module.

NOTE:

IODDT variables can be created with:

the I/O objects tab
the Data Editor

Types of Language Objects

Each IODDT has a set of language objects that is used to control and check the operation of the IODDT. There are two types of language objects:

implicit: Implicit exchange objects are exchanged automatically on each cycle turn of the task associated with the module. These exchanges concern the states of modules, communication signals, slaves, etc.
explicit: Explicit exchange objects are exchanged at the request of the application, using explicit exchange instructions. These exchanges set parameters and diagnose the module.

Elsewhere in this guide are detailed descriptions for the IODDT types.

Ethernet

A LAN cabling and signaling specification used to connect devices within a defined area, e.g., a building. Ethernet uses a bus or a star topology to connect different nodes on a network.