Mitsubishi Electric FR-F740 EC Instruction Manual page 408

Communication operation and setting
RS485 terminal system configuration
● Connection of a computer to the inverter (1 : 1 connection)
Fig. 6-149: Connection of a computer to one inverter
Set the terminating resistor switch to the "100Ω" position.
● Combination of computer and multiple inverters (1 : n connection)
Fig. 6-150: Connection of a computer to several inverters
Set only the terminating resistor switch of the remotest inverter to the "100Ω" position.
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PC
RS485
interface
Twisted pair cable
PC
RS485
interface
Twisted pair cable
PC
RS232C
interface
Maximum
RS232C
15m
cable
Converter
Twisted pair cable
Inverter
RS485
terminal
RS232C
Station 0 Station 1
RS485 RS485
terminal terminal
Station 0 Station 1
RS485 RS485
terminal terminal
PC
Inverter
terminal
Maximum
15m
cable
Converter
Twisted pair cable
Station n
RS485
terminal
Station n
RS485
terminal
Parameter
RS485
I001214E
I001215E