Справочник Пользователя для Mitsubishi Electronics QJ71LP21GE
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DEFINITIONS OF TERMINOLOGY
Term Description
Cyclic transmission
Function by which data communications are performed periodically between a remote master
station and remote I/O stations using link devices (LB/LW/LX/LY) of network modules.
station and remote I/O stations using link devices (LB/LW/LX/LY) of network modules.
Transient transmission
This function allows communication with another station's programmable controller when a
request is made with a link dedicated instruction or from GX Developer.
Communications can be made with programmable controllers on the same or other networks.
request is made with a link dedicated instruction or from GX Developer.
Communications can be made with programmable controllers on the same or other networks.
Link dedicated instruction
Dedicated instruction used for transient transmission.
RAS
The abbreviation for Reliability, Availability, and Serviceability.
This term is used to express the overall usability of automation systems.
This term is used to express the overall usability of automation systems.
Remote master station
Master station on a remote I/O network
Remote I/O station
Station that performs cyclic transmission according to the range assignment of the remote
master station.
master station.
MELSECNET/10 mode
A mode to operate the MELSECNET/H remote I/O module on the MELSECNET/10 remote
I/O network
I/O network
MELSECNET/H
(MELSECNET/10 mode)
remote I/O station
(MELSECNET/10 mode)
remote I/O station
A remote I/O station where the MELSECNET/H remote I/O module is being operated in
MELSECNET/10 mode
MELSECNET/10 mode
Reserved station
Station that is not actually connected to the network.
It must be included in the total number of stations in the network, since it is to be connected
in the future.
It must be included in the total number of stations in the network, since it is to be connected
in the future.
Relay station
Station that relays transient transmission data to another network.
Link device data of a network module are transferred to another network module via this
station.
Multiple network modules are connected to one programmable controller.
Link device data of a network module are transferred to another network module via this
station.
Multiple network modules are connected to one programmable controller.
Reconnection
Processing of restarting data link when a faulty station becomes normal.
Disconnection
Processing of stopping data link when a data link error occurs.
Device
Devices (X, Y, M, D, etc.) that are contained in a CPU module.
Link Device
Devices (LB/LW/LX/LY) that are contained in a network module.
Link scan time
Time required for data of each station to be sent in order and to make one rotation in the
network.
The link scan time changes depending on the data volume or transient transmission request.
network.
The link scan time changes depending on the data volume or transient transmission request.
Link refresh
On the remote master station, data are transferred between the master module's link devices
and the CPU module's devices. Link refresh means this processing.
Link refresh is performed in "END processing" of the sequence scan of the CPU module.
and the CPU module's devices. Link refresh means this processing.
Link refresh is performed in "END processing" of the sequence scan of the CPU module.
I/O refresh
On a remote I/O station, data are transferred between remote I/O module's link devices and
the following devices. I/O refresh means this processing.
• I/O module's devices
• Intelligent function module’s devices
the following devices. I/O refresh means this processing.
• I/O module's devices
• Intelligent function module’s devices
Automatic refresh
On a remote I/O station, data are transferred between remote I/O module's link devices and
intelligent function module's devices. Automatic refresh means this processing.
intelligent function module's devices. Automatic refresh means this processing.
Buffer memory
Memory area in an intelligent function module, in which data are temporarily stored.
The network module does not have any buffer memory area that is offered to the user.
The network module does not have any buffer memory area that is offered to the user.
Baton pass
A control mechanism in which transmission right (token) is passed around the network for
data transmission.
data transmission.
Group No.
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 No.
By specifying a group of stations as transient transmission target, data can be sent to the
stations of the same group No.