Rs-485 Terminal Block - Mitsubishi Electric FR-A820-00046 Instruction Manual

Communication connectors and terminals
2.7.3

RS-485 terminal block

Communication operation
Item
Conforming standard
Transmission format
Communication speed
Overall length
Connection cable
Tab. 2-28:
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 pro-
gram 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 page 5-602.
OPEN
100Ω
Fig. 2-43:
2 - 60
Specifications of the RS-485 terminal block
Terminating resistor switch
Initially set to "OPEN".
Set only the terminating resistor switch of
the remotest inverter to the "100Ω" position.
P5S SG SDA1 SDB1 RDA1
(VCC) (GND) (TXD1+) (TXD1-) (RXD1+)
VCC GND + TXD - +
VCC GND + TXD - +
P5S SG SDA2 SDB2 RDA2
(VCC) (GND) (TXD2+) (TXD2-) (RXD2+)
RS-485 terminal block
Specification
EIA-485 (RS-485)
Multidrop link
maximum 115200 bps
500 m
Twisted pair cable (4 pairs)
RDB1
(RXD1-)
RXD -
RXD -
RDB2
(RXD2-)
Installation and wiring
I002384E