Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 386 / 608

Communication operation and setting Parameter
6 - 232
Connection with RS-485 computer
●
Wiring of one RS-485 computer and one inverter
●
Wiring of one RS-485 computer and "n" inverters (several inverters)
햲
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.
햳
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 )
I001938E
Fig. 6-114: Connection to an inverter
I001939E
Fig. 6-115: Connection to several inverter
NOTE Do not use pins No. 2, 8 of the FR-A5CBL cable. (Refer to page 6-229.)
Computer side terminals
햲
PU connector
Cable connection and signal direction
Receive data
Receive data
Send data
Send data
Signal ground
0.2 mm² or more
Inverter
PC
햲
Station 0 Station 1 Station n
Terminating
resistor
햳
Receive
Send