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Measurement Computing PCI-COM422/485 Series User Manual

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PCI-COM422/485 Series
User's Manual
Measurement Computing Corporation
Revision 1, January, 2000
© Copyright 2000

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Summary of Contents for Measurement Computing PCI-COM422/485 Series

  • Page 1 PCI-COM422/485 Series User’s Manual Measurement Computing Corporation Revision 1, January, 2000 © Copyright 2000...
  • Page 2 HM PCI-COM422-485.DOC...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1. INTRODUCTION 2. INSTALLATION 2.1 SOFTWARE INSTALLATION 2.2 FACTORY DEFAULT PORT CONFIGURATION: 2.3 HARDWARE INSTALLATION 2.4 SET UP THE COM PORT PARAMETERS 2.4.1 IF YOU ARE USING WINDOWS 95 OR 98: 2.4.2 IF YOU ARE USING WINDOWS NT: 2.4.3 TEST THE COM PORTS FOR PROPER OPERATION (COMAPP.EXE) 2.5 RS-485 AUTO-ENABLED MODE 6 2.6 EXTENDED BAUD RATE OPERATION 6...
  • Page 4 This Page is blank intentionally .

  • Page 5: Introduction

    1. INTRODUCTION The PCI-COM422/485 family consists of one and two port, RS-422 and RS-485-compatible, serial I/O boards designed to operate in computers with PCI bus accessory slots. The package includes complete software drivers for Windows 95, 98 and NT that allow the boards to be installed as a standard “COM” port in your computer.

  • Page 6: Installation

    2. INSTALLATION 2.1 SOFTWARE INSTAL LATION Insert the PCI-COM CD into your CD drive. If your systems auto-run feature is enabled the PCI-COM installation wizard will automatically launch. If the installation wizard does not auto-launch, you can initiate the software installation by running the program SETUP.EXE on the CD.

  • Page 7: Hardware Installation

    2.3 HARDWARE INSTAL LATION The PCI-COM422/485 boards are plug-and-play configured by the host operating system. There are no switches for setting the base address or interrupt level. Configuration is controlled by your systems’ BIOS. To install the board, turn off your PC, unplug it, open it, and insert your PCI-COM422/485 board into any available PCI slot.
  • Page 8 Figure 2-2. “Advanced” port settings tab for Windows 95/98. Figure 2-3. PCIcom Control Panel Applet for Windows NT.

  • Page 9: Test The Com Ports For Proper Operation (Comapp.exe)

    2.4.3 TEST THE COM PORTS FOR PROPER OPERATION (COMAPP.EXE) An application is provided that allows you to test your installation by communicating with another RS-422 or RS-485 serial port. This test application is called ComApp.exe, and was installed during your driver installation procedure.

  • Page 10: Rs-485 Auto-Enabled Mode

    Figure 2-4. TTY Settings 4. Launch the ComApp again. You will get a second ComApp window. Go to the Settings menu and configure the second port. Note that you must use the same settings on both ports for this test to work properly. 5.

  • Page 11: Windows 95 Or 98 Specific Configuration

    If the divider is set to divide by four, (the default setting) the board’s baud rate is exactly as Windows sets it. If the divider is set to divide by two, the actual board baud rates become double what Windows has set them to. If the divider is set to divide by one, the board’s baud rate is four times the baud rate set in Windows.

  • Page 12: Windows Nt Specific Configuration

    2.6.2 WINDOWS NT SPECIFIC CONFIGURATION Extended baud rate operation is set by the control panel applet PCIcom. To change to the enhanced baud rate operating modes, follow this procedure: 1. Right-click Start, then Settings on the Task Bar. 2. Click on “Control Panel”. 3.
  • Page 13 Under Windows NT: Copy the shortcut to the general Startup folder (C:\Windows\Profiles\All Users\Start Menu\Programs\Startup) To keep the ComSet32.exe window from popping up during execution, set the shortcut to execute minimized. To set this option, do the following: Right-click on the shortcut icon and select Properties. Select the shortcut tab.

  • Page 14: Hardware Connections

    3. HARDWARE CONNECTIONS The PCI-COM422/485 series provides 9-pin female “D” (DB9M) connectors that extend through the backplate of the board. 3.1 DB9F CONNECTION S The connectors on the PCI-COM422/485 boards provide the pin-out shown in Figure 3-1 below. The view shown is looking into the connector.

  • Page 15: Standard Com Port Configurations

    2. Click on Properties. 3. Click on the Device Manager tab. 4. Click on MultiFunction. 5. Click on PCI-COM. 6. Click on Resources 7. Uncheck the Automatic Settings box. Note the I/O ranges listings. There will be one more range listed than the number of ports provided on your board (e.g.

  • Page 16: Register Map

    4. REGISTER MAP Although most users will take advantage of the COM driver supplied with the PCI-COM422/485 boards, the following register map (Table 4-1) has information for users that may require it. 4.1 REGISTER MAP OVE RVIEW Table 4-1. Register Map REGISTER READ FUNCTION WRITE FUNCTION...

  • Page 17: Port 1 Clock Select / Interrupt Status

    READ/WRITE 31:8 INTPOL INTE The UART ports are 16C550 compatible. See any 16C550 data sheet for register functions. AVAILABLE PORTS: PCI-COM422/485: PORT 1 PCI-COM422/485-2: PORTS 1-2 4.2.2 PORT 1 CLOCK SELECT / INTERRUPT STATUS BADR2 + 07 hex READ PORT1 PORT1 PORT1 PORT1...
  • Page 18 READ PORT2 PORT2 PORT2 PORT2 INT2 INT1 TXSEL1 TXSEL0 CKSEL1 CKSEL0 WRITE PORT2 PORT2 PORT2 PORT2 PORT2 TXSEL1 TXSEL0 CKSEL1 CKSEL0 ECHOEN INTx Interrupt status for each port. The same signals are connected to this read register for all ports. CKSEL1:0 UART clock select.

  • Page 19: Specifications

    5. SPECIFICATIONS Typical for 25°C unless otherwise specified. OWER CONSUMPTION PCI-COM422/485 240mA typ. PCI-COM422/485-2 250mA typ. OMMUNICATIONS SECTION Number of Ports PCI-COM422/485 PCI-COM422/485-2 Port Type RS422 or RS485 (software selectable) UART 16C550 Data Rate Up to 460 kbaud, software selectable Miscellaneous RS485 mode is software programmable for RTS Enable, DTS Enable or Automatic Enable...
  • Page 20 RTS/CTS Transceiver type SP490 Data Rate 5Mbps min. RTS/CTS Transceiver Input Characteristics Input Voltage ±14V max. Data Rate 5Mbps min. Differential Threshold Voltage ±0.2V Input Current 1mA (Vin = 12V) -0.8mA (Vin=-7V) Propagation Delay 90ns typ. (tplh/tphl) RTS/CTS Transceiver Output Characteristics Differential Output Voltage GND to Vcc (unloaded) Short Circuit Current ±250mA...

  • Page 21: Troubleshooting Q/A

    6. TROUBLESHOOTING Q/A: 1) The system was working before I rebooted and now no longer works. The main issue with detecting the PCI-COM hardware involves the system-assigned base address. The PCI- COM board relies on the Plug-and-Play capabilities of the system BIOS to assign the base address for the COM ports.
  • Page 22 This page left intentionally blank...
  • Page 23 EC Declaration of Conformity We, ComputerBoards, Inc., declare under sole responsibility that the product: PCI-COM422/485 series RS-422/485 interface for the PCI Part Number Description to which this declaration relates, meets the essential requirements, is in conformity with, and CE marking...
  • Page 24 ComputerBoards, Inc. 16 Commerce Blvd., Middleboro, MA 02346 Tel: (508) 946-5100 Fax: (508) 946-9500 Web: www.computerboards.com...

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