EDS-516A Series User’s Manual
Featured Functions
3-18
Redundant Ring Capability (< 300 ms)
Ethernet has become the default data communications medium for industrial automation
applications. In fact, Ethernet is often used to integrate video, voice, and high-rate industrial
application data transfers into one network. MOXA EDS-516A, which comes equipped with a
redundant Ethernet protocol called Turbo Ring, gives system maintainers a convenient means of
setting up a versatile yet stable Ethernet network. With Turbo Ring, if any segment of the network
gets disconnected, your automation system will be back to normal in less than 300 ms.
NOTE
Port trunking and Turbo Ring can be enabled simultaneously to form a backbone. Doing so will
increase the bandwidth of the backbone, and also provide redundancy. For example, suppose that
two physical ports, 1 and 2, are trunked to form trunk group Trk1, and then Trk1 is set as one
Turbo Ring path, if port 1 gets disconnected, the remaining trunked port, port 2, will share the
traffic. If port 1 and port 2 are both disconnected, Turbo Ring will create the back up path within
300 ms.
The Turbo Ring Concept
The proprietary Turbo Ring protocol was developed by MOXA to optimize communication
redundancy and achieve a faster recovery time on the network.
The Turbo Ring protocol designates a switch to be the “master” and a segment to be the backup
path. During normal operation, network traffic is blocked from traveling along the backup path. In
the event that a branch of the ring is disconnected from the rest of the network, the Turbo Ring
protocol automatically uses the backup segment to restore the connection, if possible.
Initial Setup
1.
Select any two ports as redundant ports.
2.
Connect the redundant ports to form the
Turbo Ring
You do not need to set the Master to use Turbo Ring. A Master is used only to identify which
segment acts as the backup path. The actual topology of the redundant ring, i.e., which segment
will be blocked, is determined by the number of EDS-516A switches that make up the ring, and
where the “Ring Master” is located.
