A1 Appendix EtherCAT Terminology
A1 - 2
GRT1-series EtherCAT Communication Unit - Operation Manual
A1-1 EtherCAT Terminology
Use the following list of EtherCAT terms for reference.
Term
Abbrevia-
tion
Description
object
−
Abstract representation of a particular component within a device,
which consists of data, parameters, and methods.
object dictionary
OD
Data structure addressed by Index and Sub-index that contains
description of data type objects, communication objects and
application objects.
service data object
SDO
CoE asynchronous mailbox communication where all objects in the
object dictionary can be read and written.
index
−
Address of an object within an application process.
subindex
−
Sub-address of an object within the object dictionary.
Process data
−
Collection of application objects designated to be transferred
cyclically or acyclically for the purpose of measurement and control.
Process data object
PDO
Structure described by mapping parameters containing one or
several process data entities.
Receive PDO
RxPDO
A process data object received by an EtherCAT Slave.
Transmit PDO
TxPDO
A process data object sent from an EtherCAT Slave.
sync manager
SM
Collection of control elements to coordinate access to concurrently
used objects.
distributed clock
DC
Clock distribution mechanism used to synchronize EtherCAT Slaves
and the EtherCAT Master Units.
device profile
−
Collection of device dependent information and functionality
providing consistency between similar devices of the same device
type.
fieldbus memory management unit
FMMU
Function which establishes single or multiple communication
between logical address and physical memory
physical device internal interface
PDI
A series of elements to access data link services from the application
layer.
CAN in Automation
CiA
CiA is the international users' and manufacturers' group that
develops and supports higher-layer protocols.
CAN application protocol over
EtherCAT
CoE
A CAN application protocol service implemented on EtherCAT.
EEPROM
EEPROM
Electrically erasable PROM. (Writable ROM)
EtherCAT Technology Group
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.
EtherCAT slave controller
ESC
A controller for EtherCAT slave communication.
EtherCAT state machine
ESM
An EtherCAT communication state machine.
EtherCAT slave information
ESI
An XML file that contains setting information for an EtherCAT Slave.
Summary of Contents for GRT1-ECT SmartSlice
Page 3: ...GRT1 series EtherCAT Communication Unit Operation Manual Revised March 2012 ...
Page 18: ...15 GRT1 series EtherCAT Communication Unit Operation Manual ...
Page 30: ...1 EtherCAT Network 1 8 GRT1 series EtherCAT Communication Unit Operation Manual ...
Page 38: ...2 EtherCAT Communication details 2 8 GRT1 series EtherCAT Communication Unit Operation Manual ...
Page 52: ...4 GRT1 ECT Details 4 10 GRT1 series EtherCAT Communication Unit Operation Manual ...
Page 76: ...6 GRT1 ECT Troubleshooting 6 12 GRT1 series EtherCAT Communication Unit Operation Manual ...
Page 136: ...A4 Appendix Object Dictionary A4 16 GRT1 series EtherCAT Communication Unit Operation Manual ...
Page 140: ...Revision 2 GRT1 ECT series EtherCAT Slave Unit User s Manual ...