Metso Automation
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278705
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Chapter 1
Introduction
Distributed Processing Unit Functionality
The Model PDP Distributed Processing Unit (DPU), which runs under the
Windows CE.net real-time multitasking operating system, is the hardware
processing engine of the maxDNA distributed control system. The DPU
performs primary data acquisition, control, and data processing functions.
The DPU, also known as maxDPU4F, is a self-contained microprocessor-
based, rack-mounted unit, which occupies a single slot in a Remote
Processing Unit cabinet using an 8-wide maxPAC backplane. It is designed
to operate with user-defined combinations of maxDNA Model IOP
Input/Output Modules, and to communicate with other devices, such as
Programmable Logic Controllers and Remote Terminal Units.
As a station on maxNET, the DPU scans and processes information for use
by other devices in the maxDNA system. Each DPU performs:
• Comprehensive alarming and calculations.
• Logging of Sequence of Events (SOE) data at 1 millisecond resolution.
• Acquisition of trend information.
• Continuous scanning of Model IOP I/O modules.
• Execution of predefined algorithms, called Function Blocks, for process
control and data acquisition.
Model Numbers
Model PDP401 – DPU4F #181550
Model PDP403 – DPU4F #181550, Backup Cable #050292
Model PDP406 – DPU4F w/IRIG & Comm. #181551
Model PDP408 – DPU4F w/IRIG & Comm #181551, Backup Cable
#050292
Summary of Contents for PDP 400 maxDPU4F Series
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