We have Solar GT controlled by turbotronic Control System using Controllogix AB PLC system with the HMI located in remote area. As our plant operators are sitting in another Place (Main Control room), then we need to transfer the operation facility to be located also in the Main Control room. There are different options to implement this, like using Modbus to communicate between AB PLC and Honeywell DCS and operate the GT from Honeywell DCS. or using Ethernet or ControlNet and install AB HMI in the Main Control room or use hardwired to connect signals from AB PLC to Honeywell DCS. DO we have to use hardwired? or Software communication is OK? which is better to use in this case Modbus and operate from DCS? or we better use remote station from Allen Bradley itself and locate in the control room where our DCS operators are sitting?