Hello, Thank you for contacting us.
It seems it supports the Modbus TCP/IP protocol. To connect this PLC using Modbus TCP/IP to Kepware, you need to follow the steps below:

In Kepware,
- Right click on Connectivity and Add New Channel of Modbus TCP/IP Ethernet and change name as per requirement
- Right click on Channel and Add New Device and change name and IP as per requirement(Modbus default port is 502 but you can confirm with device vendor)
- Refer this article for ID details in Kepware
- Add tags based on how it is defined in device
- Refer driver manual for Modbus Addressing here

Before start , please check if you can Powershell Test-NetConnect to the device on the port KEPServerEX is trying to use.
Powershell has a built in commandlet that can help prove or disprove TCP socket connectivity
Command Syntax: Test-NetConnection [host] -Port [port number]
Example: Test-NetConnection 255.255.255.255 -Port 502