EtherNet/IP™ was developed by Rockwell Automation in late 1990, and handed over to ODVA in 2001 which is now an open industrial protocol.

EtherNet/IP only works over TCP/IP, as such the port must be configured with IP address. Two parameters that need to be configured on device are Routing & Controller Slot .

The tag data type must be matched with the PLC according to the following table.

EtherNet/IP also supports contiguous polling like Modbus protocol to speed up communication by polling a continous list of addresses. This can be achieved by specifying the batch number for tags with same data type that being arranged contiguously. However auto-batching in Modbus is yet to be supported in EtherNet/IP. Setting value of zero (0) will make the polling separately which is highly discourage in most circumstances.

EtherNet/IP uses string in Path column instead of numerical value in Address column for tag data address. Fill in the Path entry with the device actual tag I/O addressing format. The path string must match with the tag name at Controller Tags, in RSLogix5000 for instance.

Configuring I/O in PLC

Configuring EtherNet/IP tags in SCADA

Note

Turn Input tag attribute to true for Read-Only input tag.