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7. PLC2Way 3-31
Serial Communications
7. PLC2Way
PLC2Way
• The “PLC2Way” function is an original network function where one V7 series can be
connected to two PLCs. Even if the manufacturers of these PLCs are not the same,
they can be connected to one V7 series.
• Connect one PLC to the CN1 connector, and the second PLC to the MJ port.
• With the PLC2Way function, it is possible to communicate with PLCs without special
program in the same way as 1 : 1 connection. Two PLCs that are connected to the V7
series are controlled at the same time, and memory read/write operations are available
with these two PLCs.
• Connection at the MJ port can be performed via RS-232C or RS-485 (2-wire). With
RS-232C, one PLC can be connected; with RS-485, a maximum of 31 PLCs can be
connected.
• Constant reading/sampling of PLC data connected to the MJ port
When read/write memory addresses are preset on the temperature control
network/PLC2Way table, background data transfer is performed at regular intervals. It
is also possible to save the read data in the V7 internal buffer, SRAM or CF card.
run
PLC
RS-232C
RS-422/RS-485
RS-232C
RS-422/RS-485
PLC
CN1
MJ2/1
PROGRAMMER
FACTORY
ACE
F1
F2
F3
F4
F5
F6
F7
SYSTEM
POWER
V7 series
(MITSUBISHI)
(2-wire connection)
(YOKOGAWA)
run
PLC
RS-232C
RS-422/RS-485
RS-422/RS-485
PLC1
CN1
MJ2/1
PROGRAMMER
FACTORY
ACE
PLC2
PROGRAMMER
FACTORY
ACE
PLCn n = 1 to 31
PROGRAMMER
FACTORY
ACE
F1
F2
F3
F4
F5
F6
F7
SYSTEM
POWER
V7 series
(2-wire connection)