S.Sh_I&C

Dear Experts, Hi; I have S7 project with 414-5H PLC. I implemented to communicate with DCS through Modbus TCP using integrated PN interface of CPU. Also, I using from the same integrated PN interface of CPU for communication between PLC with operator/engineering workstation. Hence the communication port same for the operator station and DCS. Actually, I have to communicated PLC with operator station and DCS  using same port of CPU,  but with two different protocols, one of the  Ethernet protocol and the other with Modbus TCP.   Is this possible? What problem can come across these?   I cannot find an entry in the Siemens forum concerning simultaneous connections of Modbus TCP and Fault-tolerant connections using the integrated Profinet ports of the H-CPUs.   Thanks.