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13
TERMS
Unless otherwise specified, this manual uses the following terms.
Term Description
CPU module A generic term for the MELSEC iQ-R series CPU module
RAS The abbreviation for Reliability, Availability, and Serviceability. This term refers to usability of automated
equipment.
Ver.1-compatible slave station A slave station that supports the remote net Ver.1 mode or remote device net Ver.1 mode
Ver.2-compatible slave station A slave station that supports the remote net Ver.2 mode or remote device net Ver.2 mode
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
Intelligent device station A station that exchanges I/O signals (bit data) and I/O data (word data) with another 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.
Engineering tool Another term for the software package for the MELSEC programmable controllers
Disconnection A process of stopping data link if a data link error occurs
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 labels: module label that is automatically generated by GX Works3 and
label that can be created for the any of the specified devices.
Slave station A generic term for a remote I/O station, remote device station, local station, intelligent device station,
and standby master station
Cyclic transmission A function by which data are periodically exchanged among stations on the same system using link
devices
Dedicated instruction An instruction for using functions of the module
Data link A generic term for cyclic transmission and transient transmission
Device A device (X, Y, M, D, or others) in a CPU module
Transient transmission A function to read/write data of a programmable controller on another station by using the dedicated
instruction and test or monitor another station by using the engineering tool
Buffer memory A memory in an intelligent function module, where data (such as setting values and monitoring values)
are stored.
When using the CPU module, the memory is indicated for storing data (such as setting values and
monitored values) of the Ethernet function and data used for data communication of the multiple CPU
function.
Return A process of restarting data link when a station recovers from an error
Master/local module The abbreviation for the RJ61BT11 CC-Link system master/local module
Master station A station that controls the entire system. This station can perform cyclic transmission and transient
transmission with all stations. Only one master station can be used in a system.
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.
Label A label that represents a device in a given character string
Remote I/O net mode A mode used to perform high-speed communications in a system consisting of a master station and
remote I/O station(s) only
Remote I/O station A station that exchanges I/O signals (bit data) with the master station by cyclic transmission This station
cannot perform transient transmission.
Remote station A generic term for a remote I/O station and a remote device station
Remote output (RY) Bit data output from the master station to a slave station (For some areas in a local station, data are
output in the opposite direction.)
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 cannot perform transient transmission.
Remote device net Ver.1 mode A mode used to configure a system only with a master station and Ver.1-compatible remote stations.
More remote device stations can be connected compared to the remote net Ver.1 mode.
Remote device net Ver.2 mode A mode used to configure a system only with remote stations containing master stations and Ver.2-
compatible remote stations or to add Ver.2-compatible remote stations in future (a system only with
master stations and Ver.1-compatible remote stations).
More remote device stations can be connected compared to the remote net Ver.2 mode.
Remote input (RX) Bit data input from a slave station to the master station (For some areas in a local station, data are
output in the opposite direction.)