FL-net_Cyclic

Description

This indicates detection of the Cyclic frame in the FL-net protocol.
The FL-net network enables efficient data exchange and communication between PLC units and device from various manufacturers. Cyclic frames are transmitted using broadcast by each node when it holds the token, to send other nodes of its transmission data stored in the common memory area.

Affected Products

FL-net protocol

Impact

Unexpected network communication

Technology

Browser-Based, Network-Protocol, Client-Server, Peer-to-Peer, Cloud-Based, Mobile-Device

Behavior

• Reasonable

Application Dependencies

• FL-net

Default Ports

• TCP/55004
• UDP/55000-55004

References

• https://www.jema-net.or.jp/English/businessfields/standarization/opcn/
• https://www.jema-net.or.jp/Japanese/standard/opcn/pdf/JEM_1479e(20120927).pdf