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Model PDP Series 200 maxDPU4E Hardware Guide

Control Processor

The DPU itself consists of a main board and a Control Processor daughter

card known as the Intel Embedded Pentium Processor Module. The Control

Processor interfaces with 64MByte DRAM, a PCI Bus, and 8MByte of Flash

memory.

Performance

A multispeed processing system is built into the maxDPU4E, which allows

objects to be executed in four different time classes from as fast as 20msec to

1 second. Up to 6,000 control objects (atoms) can be executed in the DPU.

Note also that Function Blocks can be combined to create libraries of

Standard and Custom Blocks. A Function Block can be as small as an

Atomic Block, such as an AND or an OR gate.

A data point management system (DPMS) keeps track of the object size and

the total execution time for each time class.

I/O Bus Interface

A Motorola 68332 32-bit I/O processor and field programmable gate array

(FPGA) are used to interface to both the Model IOP I/O bus and to the I/O

Bus Expander Module (BEM) for remote I/O applications. Up to 60 Model

IOP I/O modules can reside on the bus. See Publication 278596, maxPAC

Hardware Reference Guide, and for earlier Model 564 I/O, see 278563,

Model IOP I/O System Installation and Preparation. The maximum length of

the Model 564 I/O bus is 30 ft. The length of the remote I/O link with fiber

optic extenders is up to 2000 m.

The I/O Processor and its I/O Bus interface circuitry are known collectively

as the I/O Module (IOM).

Built-in Diagnostics

To assure reliable operation, the DPU runs diagnostic tests on itself when it

starts up and while it is running. This section describes these tests.

Control Processor Diagnostics

During Startup the CP performs the following tests:

• BIOS checksum test

• BIOS POST Tests including DRAM Memory test

• CE Integrity test of executable code via checksum test

• Configuration Database checksum test

• IP Address change test

• DPRAM integrity test

• Power supplies level checks

During normal operation the CP performs the following tests:

Metso Automation MAX Controls Inc. • 278590 •

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