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5-18 1. MITSUBISHI PLC
Ladder Transfer Function
Up until now it was necessary to debug the data by removing and mounting two cables
repeatedly as shown below when the V7 series is directly connected to MITSUBISHI’s
QnHCPU equipped with only one RS-232C port.
• RS232C cable between the computer and the PLC that is used for monitoring data in
the PLC or writing ladder programs: MITSUBISHI’s QC30R2
• The cable between the V7 series and the PLC that is used for communications with the
V7 series: Hakko Electronics’ QCPU2
When using the ladder transfer function by connecting the computer (PLC programming
software) to the V7 series, it is possible to write ladder programs or monitor the PLC
memory using the V7 series.
Applicable PLCs
MITSUBISHI PLCs
Q02, Q02H, Q06HCPU port (Q mode)
MELSEC
RESET
disc
GPPW
F1
F2
F3
F4
F5
F6
F7
SYSTEM
POWER
V7
MITSUBISHI QnH series
MITSUBISHI’s
RS-232C connecting cable
QC30R2
Computer (PC)
V7 series
RS-232C
connector
Connecting cable
QCPU2
QCPU2
MELSEC
CN1
RS-232C
RESET
disc
GPPW
(V-SFT)
V6-CP
MJ1/2
COM
F1
F2
F3
F4
F5
F6
F7
SYSTEM
POWER
V7
V7 seriesComputer (PC)
MITSUBISHI QnH series
Communications between the
computer and the PLC
Communications between V7
and the PLC