In this essay we will study the using of OPC standard in adapting and removing the
incompatibility between different components and devices in the control system . The OPC
works as a third party that connect between devices (data sources) and progr
ams that
require this data , in case those programs may can't connect directly with that devices as a
result of incompatibility between them. This incompatibility happens because these
devices and programs are from different vendors or because the devices are very old and
can't connect with newer programs. OPC will be a suitable solution for communications
problems between the devices and programs in the control system, the OPC will connect to
each of them and transfer data as good as if the connection between them is direct without
any third party.
The importance of this suggested technique will be shown practically in this essay
through the implementation of it in solving one of the pumping control system problems in
the Syrian Company for Oil Transport (SCOT). the suggestion was to use a OPC Server
program (Kepware OPC Server) and a SCADA program ( WinCC flexible) instead of the
old SCADA program and keep the old PLC devices , in this way we can get rid of the
problems that appear in the old SCADA program and therefore we can ensure that the
system will work as wanted with no problem. That will bring benefits to the company and
results to high reliability in the work.
