Terminal Block - Mitsubishi Electric FR-CC2-N Series Instruction Manual

2.7.2 RS-485 terminal block
 Communication operation
Conforming
standard
Transmission
format
Communication
speed
Overall length
Connection cable
The RS-485 terminals enable communication operation from a personal computer, etc. When the PU connector is used for
connection between the converter unit and a personal, FA, or other computer with a communication cable, a user program can
run to monitor the converter unit 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
Terminating resistor switch
Initially-set to "OPEN".
Set only the terminating resistor switch of
the remotest converter unit to the "100 Ω" position.
P5S SG
(VCC) (GND)
OPEN
VCC GND
VCC GND
100Ω
P5S SG
(VCC) (GND)
NOTE
• To avoid malfunction, keep the RS-485 terminal wires away from the control circuit board.
50
2. INSTALLATION AND WIRING
2.7 Communication connectors and terminals
EIA-485 (RS-485)
Multidrop link
Maximum 115200 bps
500 m
Twisted pair cable (4 pairs)
page 103.
SDA1 SDB1 RDA1 RDB1
(TXD1+) (TXD1-) (RXD1+) (RXD1-)
+ TXD - + RXD -
+ TXD - + RXD -
SDA2 SDB2 RDA2 RDB2
(TXD2+) (TXD2-) (RXD2+) (RXD2-)