Our company manufactures a gateway that supports the Mitsubishi MELSEC protocol (native to the iQ, FX and Q-series PLCs and motion controllers) and a variety of other included protocols (such as Modbus/TCP for the DCS side). It is also certified by the CLPA for CC-Link IE SLMP. Using a device such as this would allow you stay in an all-Ethernet environment for simplicity, cost and performance advantages.
