Practical Process Control for Engineers and Technicians

Appendix F: Installation of Simulation Software

F.1 Hardware Requirements

This document is delivered with a simulation software package. The software is supplied on a 3.5 in. floppy disk.

F.1.1 DOS-Based Version

This software package requires an IBM compatible computer and an EGA or VGA-graphics card with a minimum of 256 k memory. This software package makes full use of the 256 k graphics memory. Unpredictable results can be expected if the VGA or EGA-graphics card has less memory than required.

This software operates in real time and requires a fast computer system. If the computer is not able to finish all calculations within a given time interval ( scan time), the message slow scan will appear on the screen. If the message slow scan is on the screen, the computer executes in slow motion instead of real time. If the slow scan message disappears, the computer has regained lost time and resumed real time processing. This software, with its present configuration for training applications (exercises), has been tested on different IBM compatible computers. Most IBM-AT computers operate successfully with 1 s scan time (default). (Most IBM-XT compatible computers require a scan time of 2 s or longer to execute in real time.) IBM-AT compatible computers with a 16-bit-bus graphics adapter are capable of operating with scan times as low as 0.4 s. It is important to note, that even on the slowest computer, all provided exercises run satisfactorily. For example, if a slow computer runs with...

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