Terminology
28
NX-series Digital I/O Unit User’s Manual (W521)
Terminology
Term
Abbre-
viation
Description
application layer status, AL status
---
Status for indicating information on errors that occur in an application on
a slave.
CAN application protocol over Ether-
CAT
CoE
A CAN application protocol service implemented on EtherCAT.
CAN in Automation
CiA
CiA is the international users' and manufacturers' group that develops
and supports higher-layer protocols.
Communications Coupler Units
---
The generic name of an interface unit for remote I/O communications on
a network between NX Units and a host network master.
DC time
---
EtherCAT slaves that support distributed clock synchronization have a
clock that is shared by all slaves in the network. The time that is based
on this distributed clock is called the DC time.
device profile
---
A collection of device dependent information and functionality providing
consistency between similar devices of the same device type.
device variable
---
A variable in the NJ-series CPU Unit to which process data on an Ether-
CAT slave is allocated. Slave process data is accessed by directly read-
ing and writing device variables from user applications on the NJ-series
CPU Unit.
distributed clock
DC
Clock distribution mechanism used to synchronize EtherCAT slaves and
the EtherCAT master.
EtherCAT slave controller
ESC
A controller for EtherCAT slave communications.
EtherCAT slave information
ESI
An XML file that contains setting information for an EtherCAT slave.
EtherCAT state machine
ESM
An EtherCAT communications state machine.
EtherCAT Technology Group
ETG
The ETG is a global organization in which OEM, end users, and technol-
ogy providers join forces to support and promote the further technology
development.
I/O map settings
---
Settings that assign variables to I/O ports. Assignment information
between I/O ports and variables.
I/O port
---
A logical interface that is used by the CPU Unit to exchange data with an
external device (slave or Unit).
I/O refreshing
---
Cyclic data exchange with external devices that is performed with prede-
termined memory addresses.
index
---
Address of an object within an application process.
network configuration information
---
The EtherCAT network configuration information held by the EtherCAT
master.
NX bus
---
The NX-series internal bus.
object
---
An abstract representation of a particular component within a device,
which consists of data, parameters, and methods.
object dictionary
OD
Data structure that contains description of data type objects, communi-
cation objects and application objects.
Operational
---
A state in EtherCAT communications where SDO communications and
I/O are possible.
PDO communications
---
An acronym for process data communications.
Pre-Operational
---
A state in EtherCAT communications where only SDO communications
are possible with the slaves, i.e., no I/O can be performed.
primary periodic task
---
The task with the highest priority.
process data
---
Collection of application objects designated to be downloaded cyclically
or acyclically for the purpose of measurement and control.
process data communications
---
One type of EtherCAT communications in which process data objects
(PDOs) are used to exchange information cyclically and in realtime. This
is also called PDO communications.
Summary of Contents for NX-IA3117
Page 34: ...Sections in this Manual 32 NX series Digital I O Unit User s Manual W521...
Page 52: ...1 Features and System Configuration 1 18 NX series Digital I O Unit User s Manual W521...
Page 56: ...2 Specifications 2 4 NX series Digital I O Unit User s Manual W521...
Page 152: ...5 I O Refreshing 5 36 NX series Digital I O Unit User s Manual W521...
Page 204: ...8 Digital Mixed I O Units 8 8 NX series Digital I O Unit User s Manual W521...
Page 224: ...9 Troubleshooting 9 20 NX series Digital I O Unit User s Manual W521...
Page 230: ...10 Inspection and Maintenance 10 6 NX series Digital I O Unit User s Manual W521...
Page 337: ...I 1 I NX series Digital I O Unit User s Manual W521 Index...
Page 340: ...I 4 NX series Digital I O Unit User s Manual W521 Index...
