INTERFACING OMNI-FLOW COMPUTER TO REMOTE OPERATION CONTROLLER (ROC) REMOTE TERMINAL UNIT (RTU) FOR SCADA NETWORK IN SPDC

Tubonimi Jenewari, Biobele Alexander Wokoma

Abstract: Remote operation is a prevalent technology in our time, this has taken deep root even in the oil and gas industry. With the emergence of wireless and wired technology, with different communication protocol ranging from parallel to serial it has made the transfer of data possible and faster. This paper is to provide way for data to be transmitted from Non-Associated Gas (NAG) location Omni-flow computer to a remote location to be used in making production management decision in Shell Petroleum Development Company (SPDC). OMNI 3000 Flow Computers is used in majority of liquid and gas flow measurement and control systems, it uses serial communication protocol RS232; 4 wire – TX, TERM, RX, GRND which has its own limitation for long distance communication, it has keypad function and local display read out, this instance does not have Ethernet port. With the help of remote operation controller (ROC) remote terminal unit (RTU) the data from omni-flow computer can get to supervisory control and data acquisition (SCADA) network via a local area network (LAN) interface. With this other devices and department can use this data points to make meaningful decision from OPC server. ROC RTU has serial communication interface to enable other RTU’s communicate with it in master slave or slave master configuration.

Keywords: omni-flow computer, remote operation controller, ROC, RTU, SCADA, serial communication, LAN, RS232, Non-Associated Gas, OPC server, SPDC, shell Nigeria

DOI: https://doi.org/10.15623/ijret.2015.0404085