When Communicating With Melsecnet/H, Melsecnet/10 Relay; Melsecnet/H, Melsecnet/10 Relay Communication - Mitsubishi QJ71E71-100 User Manual

3 WHEN COMMUNICATING WITH MELSECNET/H, MELSECNET/10
RELAY

3 WHEN COMMUNICATING WITH MELSECNET/H, MELSECNET/10 RELAY

3

3.1 MELSECNET/H, MELSECNET/10 Relay Communication

Function that can be
used for
communication
Communication using
the MC protocol
Communication using
the data link
instructions
Communication with
other stations using
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The Ethernet network system can be in the same class as the MELSECNET/H,
MELSECNET/10 network system. External device or Ethernet module installed QCPU
station can give access to the other stations via Ethernet networks and
MELSECNET/H, MELSECNET/10 within the MELSECNET/H, MELSECNET/10
specification range.
In this chapter, the MELSECNET/H, MELSECNET/10 relay communication functions
are described, to perform data communication with other station PLC CPUs via
Ethernet module or MELSECNET/H, MELSECNET/10 from the QCPU at external
device or Ethernet module installed QCPU station.
The MELSECNET/H, MELSECNET/10 relay communication is a function to perform
the following data communication to the other station PLC via Ethernet or
MELSECNET/H, MELSECNET/10 from the external device or Ethernet module
installed QCPU station.
By setting the parameter described in Section 3.3, the other station access becomes
possible with the MELSECNET/H, MELSECNET/10 relay communication function.
Communication range
When using this function
Possible to read/write data
from/to other station's PLC,
which is the access request
destination, from an access
source device via multiple
MELSECNET/H,
MELSECNET/10 and
Ethernet network systems.
When not using this function
Only possible to read/write
data from/to the PLCs of other
stations in the same Ethernet
or MELSECNET/H,
MELSECNET/10 network
system as that of the station
in which the Ethernet module
is installed.
(Example) Only access 1)
shown in the diagram in
Section 3.2.1 is possible.
MELSEC-Q
Communication Function reference
request source section
External device Reference Manual
Network module
installed QCPU Chapter 4
station
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