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The Westinghouse Distributed Processing Family (WDPF®)
distributed control and information system provides modulating
control, sequential control, and data acquisition for a wide
variety of process applications. The modular, open nature
of the WDPF® architecture makes it well suited to both
simple and complex processes, large and small applications,
and a variety functions. Dual network architecture provides
effective and reliable communications-a deterministic network
for real-time process control data and an open Ethernet Information
Highway for file transfer, remote access, and enterprise integration.
WDPF® offers the flexibility to fully integrate plant
process control, local and wide area SCADA systems, PLC networks,
maintenance management and laboratory computer systems in
a single, unified architecture. And WDPF® allows you to
start with a small system and readily expand as your process
and information needs grow and change.
Drops performing functions such as CRT graphic updates, control
loop processing, alarm reporting, historical data collection
and log printing, all respond as fast during plant alarms
as they do under steady-state conditions. The system can be
expanded to a total of 254 drops, with no practical limitation
on the number of any one type of drop. A total of 32,000 individually
named points, devices, digital groups, and WDPFII overhead
points are allowed, with 16,000 variables updated each second
witho6/13/07
total coaxial data highway length allowed is 6,000 m or 3.7
miles, with no minimum or maximum distance specified between
drops.
System Features:
- Consists of a variety of functional units, called drops,
which communicate freely and rapidly via the WDPFII Westnet
Data Highway.
- Architecture permits all drops on the Data Highway to
have transparent access to any other drop's process point
values.
- Each drop on the Data Highway is a sophisticated microprocessor
capable of a large array of independent functions.
- Drops can be added as needed to expand the capability
of the system over its entire life.
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