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Possible Cause:
This error can occur when communicating to a device with a NET-ENI module. The CIP Error 0x01 means that a connection to a module failed. The Extended Error 0x0311 means that the controller has received an error while attempting to configure a connection with the module.

Solution:
A setting must be changed in the NET-ENI module to prevent this error while communicating to a Logix5000 PLC (such as ControlLogix, CompactLogix, or FlexLogix). In Allen-Bradley's ENI/ENIW Utility, open the ENI IP Addr tab and then turn on the CompactLogix Routing option.

Note:
This was tested on an ENI module with Firmware Revision 2.31.