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MSC 100 - Enciclopedia României - prima enciclopedie online despre România

MSC 100

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MSC 100 a fost un un microcalculator industrial românesc, specializat în controlul şi supravegherea proceselor de dozare discontinuă. Ca atare, putea controla maxim 16 echipamente de dozare discontinuă tip DD 116, sau 16 echipamente de dozare discontinuă monocomponentă tip MDD 101. Sistemul a fost conceput şi executat la Întreprinderea „Automatica” din Bucureşti în cursul anilor '80.

Arhitectură

MSC 100 a fost construit în jurul microprocesorului Z80, cu ceas de timp real şi întreruperi vectorizate. Dispune de o memorie EPROM de 16 kB şi de o memorie RAM de 4 kB, cu salvare pe baterie. Opţional, aceste memorii pot fi extinse cu încă 8 respectiv 16 kB.

MSC 100 are un set de drivere pentru: tastatură, ecran, imprimantă, citirea şi scrierea discurilor flexibile, ceasul sistemului şi transmisia şi recepţia echipamentelor SLAVE; de asemenea mai are un monitor standard al sistemului şi un task pentru introducerea comenzilor operator. Funcţionarea în timp real permite MSC 100 să planifice şi să sincronizeze task-urile. Prin intermediul celor două porturi seriale ale sale, care lucrează cu protocolul RS 232 / V 24 CCITT, la MSC 100 se pot conecta un videoterminalul VDT 52S şi o imprimantă serială KSR. Viteza de transmisie prin aceste porturi este configurabilă: 300, 600, 1200, 2400, 4800, 9600 sau 19200 Baud.

Unitatea de disc flexibil este de tip FDC - 8272. Programele de sistem şi aplicaţie sunt încărcate de pe dischetă şi stocate în memoria RAM, iar gestiunea materialelor şi baza de date referitoare la reţele sunt păstrate pe dischetă.

MSC 100 mai dispune de maxim 16 canale pentru intrări şi ieşiri, izolate galvanic. Prin acestea se realizează o interconectare directă la proces, conform unui program specific aplicaţiei.

Alimentarea se face la 220 V c.a., 50 ± 1 Hz. Gradul de protecţie al calculatorului este IP 30. Acesta funcţionează între 5 şi 40 °C, la o umiditate relativă maximă de 65% ± 20% la 20 °C, într-un mediu lipsit de praf şi agenţi corozivi şi la o altitudine maximă de 2000 m.

Modulul MSC 100 este un sertar de 19" cu 6 uşi, având dimensiunile de 266 × 483 × 210 mm.

Utilizare

Prin intermediul videoterminalului VDT 52S se realizează comunicarea serială full-duplex între calculator şi utilizator. Astfel, pe ecran sunt afişate datele despre starea sistemului, rapoarte de dozare, consumul de materiale, erori, alarme şi alte informaţii cerute de utilizator. Simultan, acestea pot fi tipărite la imprimanta serială. De la tastatura videoterminalului, utilizatorul poate specifica date, comenzi ori programe întregi, sau poate memora datele aplicaţiei ca fişiere pe discurile flexibile.

Bibliografie

  • Dobrescu, Sorina şi Voicu, Aldea, Echipamente şi sisteme de automatizare. Catalog de produse, Oficiul de Informare Documentară pentru Industria Construcţiilor de Maşini, Bucureşti, 1989.