
14
TERMS
Unless otherwise specified, this manual uses the following terms.
Term Description
Buffer memory A memory in an intelligent function module, where data (such as setting values and monitoring values) are
stored
CC-Link A field network system where data processing for control and information can be simultaneously performed
at high speed
CC-Link IE Field Network A high-speed and large-capacity open field network that is based on Ethernet (1000BASE-T)
Cyclic transmission A function by which data are periodically exchanged among stations on the same network using link devices
(RX, RY, RWw, and RWr)
Data link A generic term for cyclic transmission and transient transmission
Dedicated instruction An instruction that simplifies programming for using functions of intelligent function modules
Device A device (X, Y, W, or others) in a head module
Disconnection A process of stopping data link if a data link error occurs
GX Works2 The product name of the software package for the MELSEC programmable controllers
Head module The abbreviation for the LJ72GF15-T2 CC-Link IE Field Network head module
Intelligent device station
A station that exchanges I/O signals (bit data) and I/O data (word data) with the master station by cyclic
transmission. This station responds to a transient transmission request from another station and also issues
a transient transmission request to another station.
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
Link dedicated instruction
A dedicated instruction used for transient transmission with a programmable controller on another station.
This instruction allows a master/local module to communicate with programmable controllers on the same
network (CC-Link IE Field Network) and on other networks (Ethernet, CC-Link IE Controller Network, and
MELSECNET/H). In addition to CC-Link IE Field Network, Ethernet, CC-Link IE Controller Network, and
MELSECNET/H are also accessible.
Link device A device (RX, RY, RWr, or RWw) in a module on CC-Link IE Field Network
Link special register (SW) Word data that indicates the operating status and data link status of a module on CC-Link IE Field Network
Link special relay (SB) Bit data that indicates the operating status and data link status of a module on CC-Link IE Field Network
Local station
A station that performs cyclic transmission and transient transmission with the master station and other local
stations. The station is controlled by programs in the CPU module or other equivalent modules on the
station.
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.
Master/local module
A generic term for the RJ71GF11-T2, QJ71GF11-T2, QS0J71GF11-T2, LJ71GF11-T2 CC-Link IE Field
Network master/local module and the following modules when the CC-Link IE Field Network function is
used:
• RJ71EN71
• RnENCPU
Network module
A generic term for the following modules:
• CC-Link IE Field Network module
• CC-Link IE Controller Network module
• Ethernet interface module
• MELSECNET/H module
• MELSECNET/10 module
Parameter memory A flash ROM in a head module, where the parameters of the head module are stored
Programming tool Another term for GX Works2
RAS The abbreviation for Reliability, Availability, and Serviceability. This term refers to usability of automated
equipment.
Relay station A station that includes two or more network modules. Data are passed through this station to stations on
other networks
Remote device station A station that exchanges I/O signals (bit data) and I/O data (word data) with the master station by cyclic
transmission. This station responds to a transient transmission request from another station.
Remote I/O station A station that exchanges I/O signals (bit data) with the master station by cyclic transmission
Remote input (RX)
Bit data input from a slave station to the master station (For some areas in a local station, data are input in
the opposite direction.)
User's manual for the master/local module used
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