VFD EtherNet/IP Option Card
Option Card Application Manual
25
3.9.2 Dual-port Communication Device
Dual-port communication device can build up star, linear bus, and ring typology. A DLR function is
required to create for a ring typology.
【Linear Bus Typology】
【Star Typology】
【Ring Typology】
When using ring typology, check if the device supports DLR (Device Level Ring) function. There must
be at least one of the devices supports DLR function (Ring Supervisor) in the network. When
connecting with a switch in a typology, note that the switch also needs to support DLR function. Any
incorrect connection may cause communication errors.
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