Mitsubishi FR-A846-00023, Инструкция по эксплуатации

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Communication connectors and terminals
INSTALLATION AND WIRING
51
2
2.8.3
RS-485 terminal block
 Communication operation
The RS-485 terminals enable communication operation from a personal computer, etc. When the PU connector is connected
with a personal, FA or other computer by a communication cable, a user program can run to monitor the inverter or read and
write parameters.
Communication can be performed with the Mitsubishi inverter protocol (computer link operation) and MODBUS RTU protocol.
For the details, refer to the FR-A800 Instruction Manual (Detailed).
NOTE
• To avoid malfunction, keep the RS-485 terminal wires away from the control circuit board.
• When is used with a plug-in option, lead the wires on the left side of the plug-in option for wiring of the RS-485 terminals.
Warning
 While power is ON or when the inverter is running, do not open the front cover. Otherwise you may
get an electric shock.
Conforming standard
EIA-485 (RS-485)
Transmission format
Multidrop link
Communication speed
maximum 115200 bps
Overall length
500 m
Connection cable
Twisted pair cable (4 pairs)
+ - + TXD RXD - VCC GND
+ - + TXD RXD - VCC GND
RDA1
(RXD1+)
RDB1
(RXD1-)
RDA2
(RXD2+)
RDB2
(RXD2-)
SDA1
(TXD1+)
SDB1
(TXD1-)
SDA2
(TXD2+)
SDB2
(TXD2-)
P5S
(VCC)
SG
(GND)
P5S
(VCC)
SG
(GND)
Terminating resistor switch
Initially-set to "OPEN".
Set only the terminating resistor switch of
the remotest inverter to the "100
Ω " position.
OPEN
100 Ω