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Control circuit specifications
2
WIRING
2.3.6 RS-485 terminal block
2.3.7 Communication operation
Using the PU connector or RS-485 terminal, you can perform 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 and monitor the inverter or read and write to parameters.
For the Mitsubishi inverter protocol (computer link operation), communication can be performed with the PU connector
and RS-485 terminal.
For the Modbus-RTU protocol and BACnet MS/TP protocol, communication can be performed with the RS-485
terminal.
For further details, refer to
page 209.
⋅ Conforming standard: EIA-485(RS-485)
⋅ Transmission format: Multidrop link
⋅ Communication speed: MAX 38400bps
(76800bps for BACnet MS/TP protocol)
⋅ Overall length: 500m
⋅ Connection cable:Twisted pair cable
(4 pairs)
RXD
RDA1
(RXD1+)
RDB1
(RXD1-)
RDA2
(RXD2+)
RDB2
(RXD2-)
SDA1
(TXD1+)
SDB1
(TXD1-)
SDA2
(TXD2+)
SDB2
(TXD2-)
P5S
(VCC)
SG
(GND)
P5S
(VCC)
SG
(GND)
VCC
TXD
OPEN
100Ω
Terminating resistor switch
Factory-set to "OPEN".
Set only the terminating resistor switch of
the remotest inverter to the "100Ω" position.