FL-net_Trigger

Description

This indicates detection of the Trigger frame in the FL-net protocol.
The FL-net network enables efficient data exchange and communication between PLC units and device from various manufacturers. A trigger frame is sent by a node in the network startup state, to notify other nodes that the timer to wait for the transmission of participation request frames in each node has started.

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