Termination Resistor Setting - Mitsubishi MELSEC iQ-F FX5 User Manual

Termination resistor setting

Set or connect termination resistor of the inverter farthest from the FX5 PLC.
For details on connection, refer to Page 107 Connection diagram.
At the FX5 PLC
The built-in RS-485 port, FX5-485-BD and FX5-485ADP have a built-in termination resistor.
Set the termination resistor selector switch to 110 Ω.
■FX5U CPU module built-in RS-485 port
■FX5-485-BD
At the Inverter
Communication may be affected by noise echo depending on the transmission speed and transmission distance. If
communication is hindered by noise echo, connect a termination resistor to the inverter.
■Built-in RS-485 terminal
A built-in termination resistor is provided. Connect a 100 Ω termination resistor to the inverter farthest from the PLC.
OPEN
Termination
resistor selector
switch
100 
5 INVERTER COMMUNICATION
106
5.5 Wiring
Termination
resistor selector
switch
Termination
resistor
selector switch
■FX5UC CPU module built-in RS-485 port
■FX5-485ADP
Termination
resistor selector
switch
Termination
resistor selector
switch