The remote operated vehicle (ROV) basically tethered underwater robot. Thus, this research to replace the current PCB based in main control pod (MCP) which are not available in the production line into the Programming Logic Control (PLC) based. The new control system by using TwinCAT software and the network connection between ROV and PLC has been developed. In revamping the control system, it will allow for the ability to connect modules together with hardware and/or software modification. The maintenance cost of new control system is inferior compared to the existing PCB card. Moreover, the time required to conduct the maintenance is more inflective buy using PLC. For a real-time data monitoring, the ROV will used graphical user interface (GUI) to controlling the operation. The new control system performance is assimilated with existing control system in MCP at ROV