There are several OPC servers that have been tested or are known to work through the AN-X(2)-AB-DHRIO running the DH+ bridge firmware:
RSLinx Classic using the Ethernet Devices driver
Wonderware using the DASABCIP driver
Kepware using the ControlLogix Ethernet driver
Additional OPC Servers may work with this gateway, but in order to work they must support operating through a ControlLogix hardware gateway: