14
TERMS
Unless otherwise specified, this manual uses the following terms.
Term Description
ARP The abbreviation for Address Resolution Protocol. This protocol is used to obtain the MAC address of
Ethernet from an IP address.
Buffer memory Memory in an intelligent function module for storing data such as setting values and monitored values.
When integrated into the CPU module, this memory refers to a memory for storing data such as setting
values and monitored values of the Ethernet function, and data used for data communication of the
multiple CPU system function.
BUFRCV A generic term for the GP.BUFRCV and ZP.BUFRCV
BUFRCVS A generic term for the G.BUFRCVS and Z.BUFRCVS
BUFSND A generic term for the GP.BUFSND and ZP.BUFSND
CLOSE A generic term for the GP.CLOSE and ZP.CLOSE
Control CPU A CPU module that controls connected I/O modules and intelligent function modules.
The multiple CPU system allows the user to assign this control to any CPU module on a module-by-
module basis.
Control system A system that takes control and performs network communications in a redundant system.
CPU module A generic term for the MELSEC iQ-R series CPU modules
CPU module (built-in Ethernet port part) A built-in Ethernet port part of the CPU module (CPU part for the RnENCPU) ( MELSEC iQ-R
Ethernet/CC-Link IE User's Manual (Startup))
Dedicated instruction An instruction for using the functions of a module
Device A device (X, Y, M, D, or others) in a CPU module
Device supporting iQSS A generic term for a device which supports iQ Sensor Solution.
For details on iQ Sensor Solution, refer to the following.
iQ Sensor Solution Reference Manual
Engineering tool Another term for the software package for the MELSEC programmable controllers
ERRCLEAR A generic term for the GP.ERRCLEAR and ZP.ERRCLEAR
ERRRD A generic term for the GP.ERRRD and ZP.ERRRD
Ethernet device A generic term for the devices supporting IP communication (such as personal computers)
Ethernet-equipped module A generic term for the following modules when the Ethernet function is used:
• RJ71EN71
• CPU module
External device A generic term for the personal computer and other Ethernet-equipped modules connected over
Ethernet for data communications.
FTP The abbreviation for File Transfer Protocol. This protocol is used to transfer data files over a network.
Global label A label that is valid for all the program data when multiple program data are created 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.
ICMP The abbreviation for Internet Control Message Protocol. This protocol is used to exchange messages of
errors in an IP network or other information related to an Ethernet network.
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 label that represents a device in a given character string
MELSECNET/10 The abbreviation for the MELSECNET/10 network system
MELSECNET/H The abbreviation for the MELSECNET/H network system
MODBUS device Devices used for communications using the MODBUS protocol.
MODBUS/TCP A generic term for the protocols for using MODBUS protocol messages on a TCP/IP 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.
Network module A generic term for the following modules:
• Ethernet interface module
• CC-Link IE Controller Network module
• Module on CC-Link IE Field Network
• MELSECNET/H network module
• MELSECNET/10 network module
• RnENCPU (network part)
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