Mitsubishi QJ71E71-100 Series, Руководство пользователя

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MELSEC-Q
4 WHEN THE QCPU ACCESSES THE OTHER STATION PLC USING THE
DATA LINK INSTRUCTION
4
4 WHEN THE QCPU ACCESSES THE OTHER STATION PLC USING THE
DATA LINK INSTRUCTION
By using the MELSECNET/H, MELSECNET/10 relay communication function, the
Ethernet network system is regarded as the same class as the MELSECNET/H,
MELSECNET/10 network system, therefore, the QCPU can perform data
communication with the other station PLC CPUs as follows using the data link
instructions.
• PLC CPUs of other stations on the same Ethernet network system
• PLC CPUs on other Ethernet networks accessed via routers (using the router relay
function)
• PLC CPUs on other Ethernet or MELSECNET/H, MELSECNET/10 networks
accessed via the MELSECNET/H, MELSECNET/10 (using the MELSECNET/H,
MELSECNET/10 relay communication function)
In this chapter, the usage of the data link instructions, etc. are explained when the local
station QCPU performs data communication with the other station PLC CPU with the
Ethernet module via Ethernet or MELSECNET/H, MELSECNET/10.
POINT
When accessing other stations using data link instructions via Ethernet module, set
the parameters shown in Chapter 3.
4.1 Other Station Access with the Data Link Instruction
The data link instruction is an instruction to perform data send/receive, read/write of the
word device memory, and other station access such as remote RUN/STOP to the
other station QCPU connected to the MELSECNET/H, MELSECNET/10 or Ethernet.
If the initial processing of the local station, relay station, and access station's Ethernet
module is finished correctly, it will be possible to access other stations by the data link
instruction.
QCPU
Ethernet
module
(Local station)
QCPU
Ethernet
module
(Other station)
QCPU
Ethernet
module
(Other station)
QCPU
Ethernet
module
(Other station)
QCPU
(Other station)
Router
MELSECNET/H, MELSECNET/10
Other
station
access
Other station access
Other station access
Ethernet
Ethernet
Network
module
Network
module