Mitsubishi Electric FR-E700 Instruction Manual page 386

Communication operation and setting
Connection with RS-485 computer
● Wiring of one RS-485 computer and one inverter
Computer side terminals
Fig. 6-114: Connection to an inverter
● Wiring of one RS-485 computer and "n" inverters (several inverters)
Receive
Send
Fig. 6-115: Connection to several inverter
Make connection in accordance with the instruction manual of the computer to be used with.
Fully check the terminal numbers of the computer since they vary with the model.
The inverters may be affected by reflection depending on the transmission speed or transmission
distance. If this reflection hinders communication, provide a terminating resistor. If the PU con-
nector is used to make a connection, use a distributor since a terminating resistor cannot be fitted.
Connect the terminating resistor to only the inverter remotest from the computer. (Terminating
resistor: 100 )
NOTE Do not use pins No. 2, 8 of the FR-A5CBL cable. (Refer to page 6-229.)
6 - 232
Receive data
Receive data
Send data
Send data
Signal ground
PC
Cable connection and signal direction
0.2 mm² or more
Station 0 Station 1
Parameter
Inverter
PU connector
I001938E
Terminating
resistor
Station n
I001939E