Terminology
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NX-series EtherNet/IP Coupler Unit User’s Manual (W536)
Terminology
Term
Abbre-
viation
Description
Common Industrial Protocol CIP The CIP (Common Industrial Protocol) is a shared industrial protocol
used in networks such as EtherNet/IP and DeviceNet.
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.
Electronic Data Sheet EDS A text file that contains setting information for an EtherNet/IP slave.
EtherNet/IP slave --- A device that outputs the data that is received from the EtherNet/IP mas-
ter through the EtherNet/IP network to a connected external device, and
sends the data that is input from a connected external device to the Eth-
erNet/IP master through the EtherNet/IP network. An EtherNet/IP slave
is also called an “adapter.” Furthermore, it refers to the “target” when
opening a connection.
EtherNet/IP master --- A device that monitors the status of the connections with EtherNet/IP
slaves and exchanges I/O data with EtherNet/IP slaves through the Eth-
erNet/IP network. OMRON EtherNet/IP masters include EtherNet/IP
Units such as CJ1W-EIP21 and CS1W-EIP21 as well as the built-in Eth-
erNet/IP ports of CPU Units. An EtherNet/IP master is also called a
“scanner” or “controller.” Furthermore, it refers to the “originator” when
opening a connection.
I/O port --- A logical interface that is used by an NJ/NX-series CPU Unit or an
NY-series Industrial PC 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 --- The address of an NX object.
Master from another manufacturer --- An EtherNet/IP master from another manufacturer.
Network Configuration Information --- The EtherNet/IP network configuration information held by the Ether-
Net/IP master.
NX Bus --- The NX-series internal bus.
NX Unit --- An I/O or System Unit connected to the bus of an NX Communication
Coupler Unit.
NX Unit message communications --- One form of NX bus communications that uses message communica-
tions to execute the functions of NX Units and access NX objects when-
ever required.
Object --- An abstract representation of a particular component within a device,
which consists of data, parameters, and methods.
Operational Op A state in which I/O refresh communications and NX message communi-
cations are possible between the communications master and the Com-
munications Coupler Unit or NX Units.
Originator --- The node that sends a request to open a connection at the time of open-
ing a tag data link connection.
PDO Communications --- An acronym for process data communications.
Pre-Operational --- A state in which NX message communications are possible between the
communications master and the Communications Coupler Unit or NX
Units, but I/O refresh communications are not possible.
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 NX bus communications in which process data objects
(PDOs) are used to exchange information cyclically and in realtime.
Process Data Object PDO A structure that describes the mappings of parameters that have one or
more process data entities.
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