Terms - Mitsubishi Electric MELSEC iQ-R Series User Manual

TERMS

Unless otherwise specified, this manual uses the following terms.
Term
Baton pass
Buffer memory
Control CPU
Control station switching time
Control system
Cyclic transmission
Dedicated instruction
Device
Engineering tool
Global label
Group number
Intelligent function module
Link device
Link refresh
Link scan (link scan time)
Logical channel
MELSECNET/10 mode
MELSECNET/H extended mode
MELSECNET/H mode
Module label
Multiple CPU system
Normal station
Process CPU (redundant mode)
Redundant system
Relay station
Reserved station
Standby system
System A
System B
Description
A token to send data over a network
A memory in an intelligent function module, where data (such as setting values and monitoring values) are stored.
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.
A CPU module that controls connected I/O modules and intelligent function modules.
The multiple CPU system allows the user to set a CPU module to be controlled on a module-by-module basis.
Time from when the control station goes down due to power-off to when the data link is started at the sub-control station
A system that controls a redundant system and performs network communications in a redundant system
A function by which data are periodically exchanged among stations on the same network using link devices
An instruction that simplifies programming for using functions of intelligent function modules
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.
A tool used for setting up programmable controllers, programming, debugging, and maintenance
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.
Number that is assigned for transient transmission to any given stations.
By specifying a group of stations as transient transmission target, data can be sent to the stations of the same group
number.
A module that has functions other than input and output, such as an A/D converter module and D/A converter module
A device (LB, LW, LX, LY, SB, and SW) in the MELSECNET/H network module
Data transfer between a link device in a network module and a device in a CPU module. Link refresh is performed in the
END processing of the CPU module's sequence scan.
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.
An input channel that can be changed by a program. Eight channels are available. The channel number can be changed
up to 64 by changing the link special register value.
A channel number to be used when the receiving station selects send messages it receives because many types of
information is involved. The sending station corresponds to a broadcasting station distributing messages to the logical
channel, and the receiving station corresponds to a TV receiver used in general households that receives messages by
switching the logical channel.
A mode used to operate the MELSECNET/H network module in the MELSECNET/10 network
A mode in which the maximum number of link points per station in the MELSECNET/H mode is extended.
Values exceeding 2000 bytes to maximum 35840 bytes can be set.
Set this mode for the system where the number of link points per station is large.
A mode used to operate the MELSECNET/H network module in the MELSECNET/H network
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.
A system where two to four CPU modules separately control I/O modules and intelligent function modules
A station that performs cyclic transmission and transient transmission with the control station and other normal stations
A Process CPU operating in redundant mode.
A redundant system is configured with this CPU module. Process control FBs and the online module change function
can be executed even in this mode.
A system consisting of two systems that have same configuration (CPU module, power supply module, network module,
and other modules). Even after an error occurs in one of the two system, the other system takes over the control of the
entire system.
A station that includes two or more network modules. Data are passed through this station to stations on other networks.
A station reserved for future use. This station is not actually connected, but counted as a connected station.
A backup system in a redundant system
A system that is set as system A.
Redundant system consists of system A and system B. The name of system A is used to distinguish these connected
two systems.
A system that is set as system B.
Redundant system consists of system A and system B. The name of system A is used to distinguish these connected
two systems.
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