FL-net_Message.Return

Description

This indicates detection of the Message Return request/response frame in the FL-net protocol.
The FL-net network enables efficient data exchange and communication between PLC units and device from various manufacturers. The message return request frame makes a request for message return from a source node to a destination node and is used for message transmission test.
The destination node will reply with a message return response frame with the received message.

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