FuelsManager Defense
90 Administrator Manual
OPC server support
OPC server support in FuelsManager provides:
• Collection of field data from remote I/O, PLC, and other devices via Varec or
3rd party OPC servers
• Access to measured and calculated tank data via LAN
• An interface to host systems (DCS), which provide an OPC client
• Easy configuration of interchanged data using one dialog box
What is OPC?
OPC (OLE for Process Control) is an open technical specification that defines a
set of standard interfaces based on Microsoft’s OLE/COM technology. The
standards are defined and maintained by the OPC Foundation – an industry group
with over 300 members from around the world, including nearly all of the world's
major providers of control systems, instrumentation, and process control systems.
The open OPC standard and the participation of the majority of the world’s key
automation and control providers makes OPC a powerful option in the inter
operability field devices, automation systems and business / office applications.
OPC Data Access
FuelsManager implements the OPC Data Access specification used to move real-
time data from PLC’s, DCS’s, and other control devices to HMI’s and other display
clients. FuelsManager currently support the following OPC specifications.
• OPC Data Access v1.0 (OPC DA 1.0)
• OPC Data Access v2.05a (OPC DA 2.05a)
The OPC DA specification defines interfaces for both OPC clients and OPC
servers. Typically clients are HMI or other data gathering / display programs, client
applications can browse OPC servers and allow the user to select which OPC
tags the client will read. OPC servers typically provide communications to/from
devices further down the system hierarchy. OPC servers encapsulate the specific
details of talking to the device(s) and provide a well defined set of OPC tags that
the client can connect to. FuelsManager can operate simultaneously as both an
OPC client and OPC server. FuelsManager can be an OPC client and
communicate with OPC server for Tank Gauges, PLC’s and other remote I/O to
gather data from the field. At the same time FuelsManager can be providing data
to DCS’s and other business systems via its OPC server interface.
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