Manuel d'utilisation / d'entretien du produit DS-200/300 du fabricant Quatech
Aller à la page of 38
DS-200/300 Two Channel RS-422/485 Asynchronous Enhanced Serial Adapter for ISA compatible machines User's Manual QUATECH, INC. TEL: (330) 655-9000 5675 Hudson Industrial Parkway FAX: (330) 655-9010 Hudson, Ohio 44236 http://www.
.
Warranty Information Quatech In c. w arrants th e D S- 2 00/300 to be f ree of def ect s f or on e (1) year from the date of purchase. Quatech In c. will repair or replace an y adapter that fails to perform unde r norm al opera ting conditio ns and in accordan ce with the procedures o utlined in this document during the warranty period.
© 1998, Quatech, Inc. NOTICE The information contained in this document cannot be reproduced in any form without the written consent of Qu atech, Inc. L ikewise, any software programs that might accompany this document can be used only in accordance with any license agreement(s) between the purchaser and Quatech, I nc.
(This Page Intentionally Left Blank) DS-200/300 User's Manual iii.
Table of Contents 9-1 9. Troubleshooting ......................................... 8-1 8. Specifications ............................................ 7-6 7.8 RS-422/485 Peripheral Connection ................................................. 7-6 7.7 Termination Resistors .
1. General Information The Quatech, Inc. DS-200/300 provides two RS-422/RS-485 asynchronous serial communication interfaces for IBM-compatible personal computer systems using the 16-bit ISA (Industry Standard Architecture) expansion bus.
(This Page Intentionally Left Blank) 1-2 Quatech Inc..
2. Installation If the default address and interrupt settings are sufficient, the DS-200/300 can be quickly installed and put to use. The factory defaults are listed in Figure 1 .
Figure 2 --- Photo of DS-200/300 2-2 Quatech Inc..
3. Windows 95 Configuration Windows 95 maintains a registry of all known hardware installed in your computer. Inside this hardware registry Windows 95 keeps track of all of your system resources, such as I/O locations, IRQ levels, and DMA channels.
4. A hardware types list box should appear. Find the “ Multi-function Adapters” type on the list and click it. Click the “Next” button to continue. 5. A list box opens with Manufacturers on the left and the associated board Models on the right.
10. Another dialog box will open to tell you that the installation is complete. Click the “Finish” button to end the software part of the installation. 11. Windows 95 now instructs you to shut down your computer and install the hardware. Click “Yes” to shut down your computer.
Figure 3--- Windows 95 Device Manager 4. Double click the DS-200/300 Enhanced Serial Adapter model name and a properties box should open for the hardware adapter. 5. Click the “Resources” tab located along the top of the properties box. Confirm that the resources Windows 95 has allocated for the D S-200/300 match the hardware configuration.
7. The DS-200/300 serial ports are also listed under the group Ports (Com and LPT). Windows 95 does not assign COM1 - COM4 to ports addressed at nonstandard locations. The D S-200/300 ports will be enumerated starting with COM5 (or higher) even if lower logical numbers are available.
4. Addressing Ports 4.1 Setting the address The base address of each port of the DS-200/300 is set using two DIP switch packs. When setting the address selection switches, a switch in the "ON" position specifies that the corresponding address line must be a logic 0 for the port to be selected.
Switch on bit = 0 Switch off bit = 1 Serial 0 uses SW1 and SW2 Serial 1 uses SW3 and SW4 ON 123456 78 8 82 1 F 4 8 123456 ON 02 1 3 0 00 0 0 0 SW 1 SW 2 enable/ disable ON 123456 78 8 82 1 F 4 8 12345.
The standard addresses for serial ports COM1 and COM2 are listed in Figure 7. Recommended addresses for serial ports COM3 and COM4 are also listed. The switch settings for these addresses are shown in Figure 6. 02E8 hex COM4 Recommendations only. No official standards exist for COM3 and COM4.
5. Data Rate Multiplier A standard RS-422/485 serial port operates at a clock speed of 1.8432 MHz. In order to achieve higher data rates, the DS -200/300 Enhanced Serial Adapter can operate at two times, four times (16750 UART only), or even eight times (16750 UART only) this standard clock speed .
rate register bit 0 RR0 0 rate register bit 1 RR1 1 not used OR2 2 not used OR3 3 not used OR4 4 not used OR5 5 Figure 9--- Options Register bit definitions 0 1 1 1 1 0 0 1 1 0 1 0 0 0 0 0 ID0 ID1 ID0 ID1 READ WRITE Figure 10 --- ID bit write/read table The rate register allows software applications to check and set the data rate multiplier.
(This Page Intentionally Left Blank) DS-200/300 User's Manual 5-3.
6. Interrupt Level (IRQ) The DS-200/300 allows the use of any interrupt level in the range IRQ2 to IRQ7, IRQ10 to IRQ12, IRQ14, or IRQ15, selected using jumper block J3 (for Serial 0) or J4 (for Serial 1). In Figure 12 , the factory default settings for Serial 0 and Serial 1 are shown.
6.1 Interrupt Sharing Both ports on the DS-200/300 can share the same interrupt leve l or they can share their interrupt with another Quatech adapter supporting sharable interrupts. Jumper J2 can be used to connect the UART generated interrupt directly to the selected IRQ or to enable the interrupt sharing circuit.
6.2 Interrupt Status Register The DS-200/300 is equipped with an I nterrupt Status Register (ISR) which can be used to simplify the servicing of shared interrupts. This register is located at [base address+7] along with the Options Register . Like the OR, the SP jumper must be removed to access the ISR.
(This Page Intentionally Left Blank) DS-200/300 User's Manual 6-4.
7. Output Configuration The DS-200/300 provides four differential communication signals per channel. The two output signals are Transmit Data (TxD) and Auxiliary Output (AUXOUT). The two input signals are Receive Data (RxD) and Auxiliary Input (AUXIN).
7.1 RTS/CTS handshake Transmission of RTS, combined with reception of CTS, allows for hardware handshaking (data flow control) between the UART and the external device. RTS is transmitted on AUXOUT by connecting pins 4 and 5 of the jumper pack. CTS is received on AUXIN by connecting pins 1 and 2 of the jumper pack.
This is the output clock signal used by the transmitter portion of the UART. It is generally connected to the UART's own receive clock input (RCLK). This is done by connecting pins 3 and 6 of the jumper pack. If desired, XCLK can be transmitted to an external source over the AUXOUT line by connecting pins 5 and 6 of the jumper pack.
7.5 Half Duplex/Full Duplex selection Using jumper packs J6 and J8, the channels can be configured to operate in half duplex mode. This causes the transmitters to be controlled by either the Data Terminal Ready (DTR) or the Request to Send (RTS) output from the UART.
1 3 2 5 4 6 XCL K RTS CTS RCLK DTR DSR DCD RI AUX OUT RS-422 or RS-485 Driver + - AUX IN RS-422 or RS-485 Receiver + - 1 3 2 5 4 6 -1 TXEN RXEN Figure 22 --- Output control block diagram 7.6 Factory Default Configuration of DS-200/300 The DS-200/300 is shipped from the factory with each channel configured as shown in Figure 23.
7.7 Termination Resistors Optional line termination resistors are provided for the input s ignals of each of the DS-200/300’s RS-422/485 ports. The user has the option of selecting RS-422 termination ( 100W ), RS-485 termination (120 W ), or no termination.
Auxiliary channel input (negative) AUXIN- 9 Serial data input (negative) RXD- 8 Serial data output (negative) TXD- 7 Auxiliary channel output (negative) AUXOUT- 6 Auxiliary channel input (positive) AU.
(This Page Intentionally Left Blank) DS-200/300 User's Manual 7-8.
8. Specifications BAUD RATES: 921.6 kbps with 16750 UARTs 230.4 kbps with 16550 UARTs UARTs: Two 16550 UARTs with 16-byte FIFOs or two 16750 UARTs with 64 byte FIFOs TRANSCEIVERS: MAX491 or compatible DRIVER RISE OR FALL TIME: 5 ns minimum 15 ns typical 25 ns maximum MAXIMUM DATA RATE: 2.
(This Page Intentionally Left Blank) 8-2 Quatech Inc..
9. Troubleshooting Listed here are some common problems and frequent causes of those problems. Suggestions for corrective action are given. If the information here does not provide a solution, contact Quatech Customer Service for technical support. Any unauthorized repairs or modifications will void the DS-200/300's warranty.
.
DS-200/300 User's Manual Revision 3.11 March 2004 P/N: 940-0049-311.
Un point important après l'achat de l'appareil (ou même avant l'achat) est de lire le manuel d'utilisation. Nous devons le faire pour quelques raisons simples:
Si vous n'avez pas encore acheté Quatech DS-200/300 c'est un bon moment pour vous familiariser avec les données de base sur le produit. Consulter d'abord les pages initiales du manuel d'utilisation, que vous trouverez ci-dessus. Vous devriez y trouver les données techniques les plus importants du Quatech DS-200/300 - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation Quatech DS-200/300, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le Quatech DS-200/300 va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le Quatech DS-200/300, mais vous avez pas encore lu le manuel d'utilisation, vous devez le faire pour les raisons décrites ci-dessus,. Vous saurez alors si vous avez correctement utilisé les fonctions disponibles, et si vous avez commis des erreurs qui peuvent réduire la durée de vie du Quatech DS-200/300.
Cependant, l'un des rôles les plus importants pour l'utilisateur joués par les manuels d'utilisateur est d'aider à résoudre les problèmes concernant le Quatech DS-200/300. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei Quatech DS-200/300 ainsi que les instructions sur la façon de les résoudre. Même si vous ne parvenez pas à résoudre le problème, le manuel d‘utilisation va vous montrer le chemin d'une nouvelle procédure – le contact avec le centre de service à la clientèle ou le service le plus proche.
