Centum 3000 Talks Modbus TCP?

Hi,

I am trying to get a SCADA system (e.g., wonderware) to poll data from Centum CS 3000 using Modbus TCP. As far as my research goes, all I need is to install ALE 111 on the Centum CS 3000 and connect the SCADA to the ALE 111 using Ethernet. Am I correct?

Thanks.