Challenges
Communicating over a satellite network presents a unique set of challenges. Typical
SCADA networks poll in a round robin fashion, but since VSAT charges by the amount of
bandwidth is necessary to have controls of the data throughput. The solution must offer the flexibility to incorporate all existing hardware.
One of biggest problems to many of the solutions today is the economic barrier presented
by the lack of communication compatibility. This problem is compounded by the vast array
of existing equipment that often forces users to decommission and replace perfectly
adequate systems and devices prematurely. End solution must create a communication network
incorporating many different mediums among products with dissimilar protocols into one
common platform eliminating these problems faced today and retaining the capitol
investment already in place.
To achieve a protocol neutral homogenous network, conversion
of the existing protocols is required at the remote site. Thus, the addition of new
equipment or incorporation of old is a download away with a new configuration enabling
Chevron to choose and expand equipment based on technical features and cost, not on
proprietary concerns with a simple change in the remote configuration.
It is crucial that an IP network is provided, given the
capabilities of TCP/IP with multiple logic connections on the same communications port,
the end-user can Telnet into a site and diagnose problems without affecting system
performance. Real-time data captures of the actual hex values of polls sent to a device
with its corresponding response can be analyzed remotely by a dial-up connection or
through the local LAN.
The Key to Success
Arcom provided the data controls center at each remote site with an APEX. The APEX
has the ability to poll the RTU protocols, provide an IP interface, create a network with
multiple logic connectivity, increase diagnostic capabilities with the use of tolls like
TELNET and FTP. |
Year 2000
Readiness Disclosure
