15
TERMS
Unless otherwise specified, this manual uses the following terms.
Term Description
Authentication Class A class classified by CC-Link Partner Association according to functions and performance of CC-Link IE TSN-compatible
devices and switching hubs.
For details on the authentication Class, refer to the CC-Link IE TSN Installation Manual issued by CC-Link Partner
Association (BAP-C3007ENG-001).
Buffer memory A memory in an intelligent function module, where data (such as setting values and monitoring values) are stored.
Conformance testing Testing performed for communications of a CC-Link or CC-Link IE product to ensure their high reliability.
For details, refer to the CC-Link Partner Association website. (www.cc-link.org)
Control CPU A CPU module that controls connected I/O modules and intelligent function modules. In a multiple CPU system, there are
multiple CPU modules and each connected module can be controlled by a different CPU module.
Cyclic transmission A function by which data are periodically exchanged among stations on the network using slave labels
Dedicated instruction An instruction that simplifies programming for using functions of intelligent function modules
Device A memory of a CPU module to store data. Devices such as X, Y, M, D, and others are provided depending on the intended
use.
Disconnection A process of stopping data link if a data link error occurs
General-purpose hub An authentication Class A switching hub authorized by CC-Link Partner Association
Global label A label that is enabled for all program data when creating multiple program data in the project. There are two types of global
label: a module specific label (module label), which is generated automatically by GX Works3, and an optional label, which
can be created for any specified device.
Grandmaster A source device or station to synchronize clocks in the time synchronization via PTP
GX Works3 The product name of the software package for the MELSEC programmable controllers
Intelligent function module A module that has functions other than input and output, such as an A/D converter module and D/A converter module
Label A variable used in a program
Link device A device (RX, RY, RWr, or RWw) in a module on CC-Link IE TSN
Link refresh Processing of data transfer between link device of the Motion module and CPU module devices. Link refresh is performed in
"END processing" of the sequence scan of the CPU module.
Link scan (link scan time) Time required for all the stations on the network to transmit data. The link scan time depends on data volume and the number
of transient transmission requests.
Master station A station that controls the entire network. This station can perform cyclic transmission and transient transmission with all
stations. Only one master station can be used in a network.
Module label A label that represents one of memory areas (I/O signals and buffer memory areas) specific to each module in a given
character string. For the module used, GX Works3 automatically generates this label, which can be used as a global label.
Motion control station A station that updates a link device in the Motion module
Motion module Another term for the RD78G(H)
MR-J5-G MR-J5-_G_(-RJ) servo amplifier
MR-J5W-G MR-J5W_-_G servo amplifier
Object Various data of a slave device compatible with CANopen
Priority A value that is assigned to devices or stations in a network to determine the grandmaster for time synchronization. The
smaller the value, the higher the priority.
PTP Precision Time Protocol. A predefined protocol for time synchronization between devices on a network.
RD78G Another term for the MELSEC iQ-R series Motion module (compatible with CC-Link IE TSN)
RD78GH
Relay station A station that relays data link to other station with mounting more than one network modules on one programmable controller
Remote station A station that exchanges I/O signals (bit data) and I/O data (word data) with another station by cyclic transmission. This
station can perform transient transmission.
Reserved address An IP address reserved for special purposes, defined by RFC 6890. This IP address cannot be used when the
programmable controller is connected via the global IP network.
Reserved station A station which is not actually connected. It is included as a station in the network when its all number is counted.
Return A process of restarting data link when a faulty station recovers from an error
Routing A process of selecting paths for communication with other networks. There are two types of routing: dynamic routing that
auto-selects the communication routes, and static routing where communication routes are arbitrarily set.
RWr A remote register of the link device. This refers to word data input from a slave station to the master station. (For some areas
in a local station, data are input in the opposite direction.)
RWw A remote register of the link device. This refers to word data output from the master station to a slave station. (For some
areas in a local station, data are output in the opposite direction.)