Manual says at page 103.
https://www.amci.com/files/8515/4886/4664/SMD23E2_Users_Manual_-_0S153.pdf
2.2c Use the AMCI Net Configurator Utility (continued)
"The factory default protocol for the SMD23E2 and SMD24E2 is EtherNet/IP. In order to use the Modbus TCP
or PROFINET protocols, simply click on the appropriate button."
https://www.amci.com/files/8515/4886/4664/SMD23E2_Users_Manual_-_0S153.pdf
2.2c Use the AMCI Net Configurator Utility (continued)
"The factory default protocol for the SMD23E2 and SMD24E2 is EtherNet/IP. In order to use the Modbus TCP
or PROFINET protocols, simply click on the appropriate button."