A-5 Ethercat Terminology - Omron R88D-KN01L-ECT-L User Manual

A-5 EtherCAT Terminology
Use the following list of EtherCAT terms for reference.
Term
Object
Object Dictionary
Service Data Object
Index
Sub-index
Process Data
Process Data Object
Receive PDO
Transmit PDO
Sync Manager
Distributed Clock
Device Profile
Fieldbus Memory
Management Unit
Physical Device Internal
Interface
CAN in Automation
CAN application protocol
over EtherCAT
EEPROM
EtherCAT Technology
Group
EtherCAT slave controller
EtherCAT state machine
EtherCAT Slave
Information
Slave Information
Interface
Power Drive System
G5-series Linear Motors/Servo Drives With Built-in EtherCAT Communications
Abbreviation
– Abstract representation of a component within a device, which consists of
data, parameters, and methods.
OD Data structure addressed by Index and Sub-index that contains description
of data type objects, communication objects and application objects.
SDO CoE asynchronous mailbox communications where all objects in the object
dictionary can be read and written.
– Address of an object within an application process.
– Sub-address of an object within the object dictionary.
– Collection of application objects designated to be transferred cyclically or
acyclically for the purpose of measurement and control.
PDO Structure described by mapping parameters containing one or several
process data entities.
RxPDO A process data object received by an EtherCAT slave.
TxPDO A process data object sent from an EtherCAT slave.
SM Collection of control elements to coordinate access to concurrently used
objects.
DC Method to synchronize slaves and maintain a global time base.
– Collection of device dependent information and functionality providing
consistency between similar devices of the same device type.
FMMU Single element of the fieldbus memory management unit: one
correspondence between a coherent logical address space and a coherent
physical memory location.
PDI A series of elements to access data link services from the application layer.
CiA CiA is the international user's and manufacturer's group that develops and
supports higher-layer protocols.
CoE A CAN application protocol service implemented on EtherCAT.
EEPROM Electrically erasable PROM.
ETG The ETG is a global organization in which OEM, End Users and Technology
Providers join forces to support and promote the further technology
development.
ESC A controller for EtherCAT slave communication.
ESM An EtherCAT communication state machine.
ESI An XML file that contains setting information for an EtherCAT slave.
SII Slave information stored in the nonvolatile memory of each slave.
PDS A power drive system consisting of a Servo Drive, an inverter, and other
components.
Description
Appendices
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