Hi Lee Oon Keng!
Ethernet/IP is supported, check it in the listed communication procols of this post:
If you already have a DTM file from the other master/slave you want to connect, in that case PLC of Omron, then you can just add it to an interface X20IF10D1-1 (master) or X20IF10D3-1 (slave). You have just to add it previously from Tools > Manage 3rd party devices in Automation Studio.
+info: EtherNet/IP