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Realtime Process Equipment Control Disclosure Number: IPCOM000083720D
Original Publication Date: 1975-Jul-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 3 page(s) / 42K

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Caldwell, DL: AUTHOR


Over the years a number of approaches to high-speed realtime test and process equipment control have been suggested.

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Realtime Process Equipment Control

Over the years a number of approaches to high-speed realtime test and process equipment control have been suggested.

Traditionally, the problems have been solved by massive system configurations which are very costly and space consuming at the least. Such solutions as the minicomputers tightly coupled to larger computer, or more powerful computers with complex hardware interfaces have been suggested.

For these complex operations a grouping of less powerful computers can provide the control/monitor, data transfer and analysis tasks, and data communications at a much lower cost and require much less space.

Because of the distributed processor architecture of the central processing unit of these machines, there is a.grouping of independent satellite processors (computers) for simultaneous and independent instruction processing and input/output processing.

Each of the processors is implemented through the use of microprograms residing in discrete reloadable control storage areas. Control storage is separate from main storage. These independent processors operate concurrently, using the main storage controller to access main storage. This distributed (grouping of processors) design increases the utilization of processing resources.

Each input/output (I/O) processor can perform a different task. These tasks can range from selector channel operation to sensor based control operation, when the basic processor is combined with the proper front end (FE) circuitry and microprograms.

The digital input/output (DIO) attachment allows one or more of the processors in the CPU group to function as sensor based processors (process and/or equipment controllers). While the other processors perform other system functions.

The digital input/output attachment contains the hardware necessary to implement the following configuration: Digital Input - Up to 72 points in 9 groups. Digital Output - Up to 72 points in 9 groups.

A group in this case is defined as one eight-bit register. The above configuration provides for an equal number of digital input/output groups. Any number of digital input/output groups may be configured, as long as the total n...