5.1 Overview on RS-485 Communication
5-1
Chap. 5 RUNNING THROUGH RS-485 COMMUNICATIONS
5.1 Overview on RS-485 Communication
Using the RS-485 communications port on the FRENIC-Mini series enables the following extended
functions.
Operation from a remote keypad
Connecting a remote keypad to the RS-485 communications port on the inverter with an extension
cable allows you to mount the keypad on the easy-to-access front of a panel. The maximum length of
the extension cable is 20 m (66 ft.).
Operation by FRENIC Loader
The FRENIC-Mini can be connected to a Windows-based PC, on which you can run FRENIC Loader
(see Section 5.2 "Overview of FRENIC Loader.") to edit the function code data and monitor the
running status information of the inverter.
Operation from the host equipment
The FRENIC-Mini can be connected to host equipment (master) such as a PLC or computer. It can act
as a slave device.
Protocols for managing a network including inverters include the Modbus RTU protocol (compliant to
the protocol established by Modicon Inc.) that is widely used in FA markets and the Fuji
general-purpose protocol that supports the FRENIC-Mini and conventional series of inverters.
For the remote keypad, the inverter uses the dedicated protocol that automatically switches
the operation source to the remote keypad, so no function code setting is required.
For FRENIC loader, however, you need to set up function code H30 for some
communications conditions although the dedicated protocol is used.
To Next Page
Loading...
