5.5.2 Dual String Topology
The Dual String Topology is a variation of the String network configuration. A Dual String network is a single
SynqNet network with nodes connected to both the controller’s OUT port and IN port. Packets are sent down-
stream from the controller to the nodes via the OUT port and IN port. Each node repeats the downstream data
to the next node. Packets are also sent upstream from the nodes to the controller. Each node repeats the
upstream data to the next node. If a cable breaks, the nodes downstream from the break will no longer be able
to send/receive packets to/from the controller.
Due to the un-terminated nature of a Dual-String Topology, discovering a topology of this type requires a
timeout period to detect the end of the string. Therefore, more time is needed to discover an un-terminated
String Topology than other network types. To reduce the discovery time, add a Loop-back Connector to the
end of the topology (Dual String Topology with Termination).
The Dual String topology does NOT support fault recovery.
AKD SynqNet | 5 Installation and Setup
Kollmorgen | kdn.kollmorgen.com | October 2020
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