Fuji Electric RS-485 Communications Card User Manual

About this manual

This manual provides installation, configuration, and operation instructions for the RS-485 communications card that expands the functionality of Fuji Electric's FRENIC series inverters. It covers safety precautions, wiring, protocol details, and data formats for Modbus RTU, Fuji general‑purpose inverter, and other supported protocols.

The document includes specifications such as transmission speed, cable length, connector types, and supported station counts, as well as detailed chapters on function codes, floor‑level network (P1) protocol, and Metasys N2 protocol.

What's inside

• Safety Precautions
• Common Specifications
• Modbus RTU Protocol
• Fuji General‑Purpose Inverter Protocol
• Function Codes and Data Formats
• Floor Level Network (P1) Protocol
• Metasys N2 Protocol

Specifications

Frequently asked questions

Which communication protocols are supported by the RS‑485 card?

The card supports FGI‑BUS, Modbus RTU, Loader commands, and Fuji general‑purpose inverter protocol.

How many inverter stations can be connected to the RS‑485 communications card?

One host device and up to 31 inverters can be connected.

What is the maximum transmission speed for the card when used with a FRENIC‑Mini inverter?

The maximum speed is 19 200 bps for FRENIC‑Mini.

What connector type is used for RS‑485 communications?

An 8‑wire RJ‑45 connector or a terminal block is used.