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1. 1 : 1 Connection 3-1
Serial Communications
1. 1 : 1 Connection
1 : 1 Connection
• One set of the V7 series is connected to one PLC (1 : 1 connection).
• The host link unit of the PLC or the CPU port is used and the V7 series (master station)
establishes communications according to the protocol of the PLC. Consequently, it is
not necessary to have the dedicated communication program on the PLC (slave
station). The V7 series reads the PLC memory for screen display. It is also possible to
write switch data or numerical data entered through the keypad directly to the PLC
memory.
run
PLC
F1
F2
F3
F4
F5
F6
F7
SYSTEM
POWER
CN1
RS-232C or RS-422 (RS-485)
V7 series
PLC
F1
F2
F3
F4
F5
F6
F7
SYSTEM
POWER
Read
Write
V7 series