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Protocole RS232
1. Introduction
Ce document décrit les spécications d'interface matérielle et les protocoles de logiciel de
l'interface de communication RS232 entre l'écran commercial Viewsonic et un PC ou une autre
unité de contrôle avec le protocole RS232.
Le protocole se divisent en trois sections :
• Régler-Fonction
• Obtenir-Fonction
• Mode pass-through télécommande
* Dans le présent document, “PC” représente toutes les unités de contrôle qui peuvent envoyer
ou recevoir la commande de protocole RS232.
2. Description
2.1 Spécications du matériel
Port de communication Viewsonic dans la face arrière
(1) Type de connecteur : DSUB 9 broches mâle
(2) Affectation des broches
2.2 Réglages de communication
Sélection du débit en bauds : 9600bps (xe)
Bits de données : 8bits (xe)
Parité : Aucune (xe)
Bits d’arrêt : 1 (xe)
2.3 Référence de message de commande
Le PC envoie au moniteur un paquet de commande suivi de "CR". Chaque fois que le PC envoie
une commande de contrôle au moniteur, le moniteur doit répondre comme suit :
1. Si le message est reçu correctement il va envoyer “+” (02Bh) suivi par “CR” (00Dh)
2. Si le message est reçu incorrectement il va envoyer “-” (02Dh) suivi par “CR” (00Dh)
Trou # Signal Remarque
1 NC
2 RXD Entrée vers l’écran
3 TXD Sortie de écran
4 NC
5 MASSE
6 NC
7 NC
8 NC
9 NC
cadre MASSE
* L'utilisation d'un câble crossover (modem nul) est requis
pour l'utilisation avec un PC.
1234
5
6789
DSUB mâle 9 broches
(vue extérieure)
42


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