Tektronix DAS-800 Series Users Guide

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DAS-800 Series

User’s Guide

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DAS-800 Series

User’s Guide

Revision A - December 1993

Part Number: 85790

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The information contained in this manual is believed to be accurate and reliable. However, the manufacturer assumes no responsibility for its use; nor for any infringements or patents or other rights

of third parties that may result from its use. No license is granted by implication or otherwise under any

patent rights of the manufacturer.

THE MANUFACTURER SHALL NOT BE LIABLE FOR ANY SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RELATED TO THE USE OF THIS PRODUCT. THIS PRODUCT

IS NOT DESIGNED WITH COMPONENTS OF A LEVEL OF RELIABILITY THAT IS SUITED

FOR USE IN LIFE SUPPORT OR CRITICAL APPLICATIONS.

All brand and product names are trademarks or registered trademarks of their respective companies,

0 Copyright Keithley Instruments, Inc., 1993.

All rights reserved. Reproduction or adaptation of any part of this documentation beyond that permitted by Section 117 of the 1976 United States Copyright Act without permission of the Copyright owner is unlawful.

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Table of Contents

Preface

1 Overview

Supporting Software . . . . . . . . . . . . .

Accessories

2 Functional Description

Analog Input Features ..............

Channel Configuration ...........

Input Configuration ...........

Gains and Ranges. ............

Channel Selection ............

Channel Expansion ...........

Conversion Clock Sources ........

Triggers. ......................

Gates .........................

Data Transfer. ..................

Digital I/O Features ................

8254 Counternimer Circuity ........

Interrupts ........................

Power ...........................

........

.......

. . . . l-2

. . . . 1-4

. ...2-2

. ...2-3

. . . .2-4

. ...2-5

. ...2-6

. ...2-8

. ..2-12 . ..2-14 . ..2-16 . ..2-17 . ..2-17 . ..2-25

. ..2-26

3 Setup and Installation

Installing the Software. ...............................

Installing the DAS-800 Series Standard Software Package . .3-5 Installing the ASO- Software Package

DOS Installation. ...............................

Windows Installation ............................

Unpacking the Board. ................................

Configuring the Board. ...............................

Creating a Configuration File.

Setting the Base Address ...........................

Setting the Input Contiguration ......................

Setting the Interrupt Level .........................

Installing the Board .................................

.3-4

.............. .3-6

.3-6 .3-7 .3-8 .3-8

....................... .3-9

.3-13 .3-16 .3-17 .3-19

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Cabling and Wiring

Attaching Accessory and Expansion Boards.

Attaching an STC-37 Screw Terminal Connector Attaching an STA-08 / STA-OSPGA Screw Terminal

Accessory. .....................................

Attaching an EXP-16 or EXP-16/A Expansion Board. Attaching an EXP-GP Expansion Board

Attaching an MB Series Backplane ...................

Connecting Multiple Expansion Boards.

Connecting Signals ..................................

Connecting an Analog Input Signal to a Single-Ended Input. 4-9 Connecting an Analog Input Signal to a Differential Input .4-10

Connecting Digital Signals, ........................

Connecting Counter/Timer I/O Signals Synchronizing Conversions on Multiple Boards

The Control Panel

..............

........ .4-3

...............

........ .4-13

.4-l

.4-4

.... .4-5

.4-6 .4-7 .4-7 .4-9

.4-12 .4-12

6 Calibration

Equipment Required Potentiometers Calibration Utility

Troubleshooting

Problem Isolation Troubleshooting Table. Technical Support

Specifications

Connector Pin Assignments

............................

.................................

..............................

...............................

..........................

..............................

c DAS-800 Series External Driver

Running the DAS-800 Series External Driver. . . . . . .

Accessing the DAS-800 Series External Driver

Special Characteristics.. . . . . . . . . . . . .

Pseudo-Digital Output: Extended Functions. . . . .

Analog Triggers

Data Formats . . . . . . . . . . . . .

Using Expansion

Board

Gains . . . .

.,6-l

.6-2 .6-4

.,7-l

. . l-2 . l-4

.c-2 .c-2 .c-3

. .c-3

.C-6 .c-9

.c-11

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Software Interrupt Vectors ......................

Counter/Iimer Functions .......................

Error Messages. .................................

Keithley Memory Manager

Installing and Setting Up the KMM.

Using

KMMSETUP.EXE

Using a Text Editor.

.......................

...........................

.................

Removing the KMM .............................

Index

List of Figures

Figure 2-l. DAS-800 Series Functional Block Diagram Figure 2-2. Channel Expansion

...................

Figure 2-3. Initiating Conversions .................

Figure 2-4. Initiating Conversions with a Hardware

Trigger

Figure 2-5. Hardware Gate.

.............................

......................

Figure 2-6. Pulse on Terminal Count Mode. .........

Figure 2-7. Programmable One-Shot Mode. .........

Figure 2-8. Rate Generator Mode.

.................

Figure 2-9. Square-Wave Generator Mode ..........

Figure 2- 10. Software-Triggered Strobe Mode ........

Figure 2-l 1 Figure 3-l. Figure 3-2. Figure 3-3. Figure 3-4. Figure 3-5. Figure 4-l. Figure 4-2.

Hardware-Triggered Strobe Mode. .......... .2-24

DAS-800 Board. ......................... .3-2

DAS-Sol/802 Board ...................... .3-3

Setting the Base Address. ................. .3-14

Setting the Input Configuration. ............ .3-17

Setting the Interrupt Level. ................ ,3-18

Main I/O Connector on a DAS-800 Board ..... .4-2

Main I/O Connector on a DAS-801 or

DAS-802 Board. ......................... .4-3

Figure 4-3.

Attaching an STC-37 Screw Terminal

Connector. .............................. .4-4

Figure 4-4.

Attaching an STA-08 / STA-OSPGA Screw

Terminal Accessory. ...................... .4-5

Figure 4-5.

Attaching an EXP-16 or EXP-16/A Expansion

Board .................................. .4-6

Figure 4-6. Figure 4-7.

Attaching an EXP-GP Expansion Board. ...... .4-7

Connecting Multiple Expansion Boards ....... .4-8

.c-12 .c-12 .c-13

. D-2

D-2

. D-3

D-4

. .2-2 . .2-l .2-10

.2-13 .2-15 ,2-19 .2-20 .2-21 .2-22 .2-23

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Figure 4-8. Figure 4-9.

Single-Ended Input , . . . . . . . . . . . . .4-10

Differential Input. . . . . . . . . . . .4-l 1

Figure 4-10. Synchronizing Conversions on Multiple

Boards . . . . . . , . . . . . . . . . . . . .4-13

Figure 4-l 1.

Figure 6-l. Figure 6-2. Figure B-l. Figure B-2. Figure C-l. Figure C-2. Figure C-3.

List of Tables

Table 2-1.

Table 2-2. Table 2-3.

Dividing the Rate of the Master Clock .4-14

Potentiometers (DAS-800) . . . . . . . . . .6-3

Potentiometers (DAS-801 / DAS-802) . .6-3

Main I/O Connector (DAS-800) . . . . .B-2

Main I/O Connector @AS-801 / DAS-802) . . .B-5 Analog Trigger Conditions . . .C-7

Using a Hysteresis Value. . , . . . . . .C-8

Initiating Conversions with an Analog Trigger. . .C-9

Supported Gains .........................

Sources for 8254 Documentation

...........

Expansion Board / Backplane Power

Limitations .............................

Table 3-1. Table 3-2. Table 3-3. Table 7-1. Table A- 1.

Default Configuration I/O Address Map (OOOH to 3FFH)

....................

..........

Interrupt Levels .........................

Troubleshooting Information.

...............

DAS-800, DAS-801, and DA.%802

Specifications. ...........................

Table B-l.

Main I/O Connector Pm Assignments for the

DAS-SOO................................B- 3

Table B-2. Table C- 1.

Table C-2. Table C-3.

Main I/O Connector Pin Assignments for the DAS-801 /DAS-802

Pseudo-Digital Output Channels

......................

.............

Interrupt Vectors ........................

Error/Status Codes

.......................

.2-4

.2-25 .2-27

.3-10 .3-14 .3-18

.7-2

A- 1

.B-6

.C-4 .C-12 .C-13

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Preface

The DAM00 Series User’s Guide provides the information needed to set up, install, and use DAS-800 Series boards.

The manual is intended for data acquisition system designers, engineers, technicians, scientists, and other users responsible for setting up, cabling,

and wiring signals to DA,%800 Series boards. It is assumed that users are familiar with application.

data

acquisition principles and with their particular

The

DAS-BOO Series

Chapter 1 provides an overview of the features of DA%800 Series boards, including a description of supported software and accessories.

Chapter 2 provides a more detailed description of the analog input, digital I/O, and counter/timer I/O features of DAS-800 Series boards.

Chapter 3 describes how to unpack, configure, and install DAS-800 Series boards.

Chapter 4 describes how to attach accessory and expansion boards and how to wire signals to DAS-800 Series boards.

Chapter 5 describes how to use the Control Panel to test the functions of DAS-800 Series boards.

Chapter 6 describes how to calibrate DAS-800 Series boards.

Chapter 7 provides troubleshooting information.

Appendix A lists the specifications for DAS-800 Series boards.

User’s Guide is organized as follows:

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. Appendix B lists the connector pin assignments. . Appendix C describes how to use the DAS-800 Series External

Driver. The DAS-800 Series External Driver allows you to use DAS-800 Series boards with certain data acquisition and analysis software packages.

. Appendix D describes the Keithley Memory Manager. The Keithley

Memory Manager allows you to allocate sufficient memory when running under Windowsm.

An index completes this manual. Throughout the manual, keep the following in mind: . References to DAS-800 Series boards apply to the DAS-800,

DAS-801, and DAS-802 boards. When a feature applies to a particular board, that board’s name is used.

. References to Microsoft@ QuickBasic” apply to both Microsoft

QuickBASIC (Version 4.0) and Microsoft QuickBasic (Version 4.5).

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Overview

The DAS-800 Series is a family of analog input and digital input and output (I/O) boards for an IBM@ PC/XTTM, AT’ or compatible computer. The DAS-80 Series includes the DAS-800, DAS-801, and DAS-802 boards, The major features of DAS-800 Series boards are as follows:

Eight analog input channels (single-ended on the DAS-800;

single-ended or differential on the DAS-801 and DAS-802).

Fixed f5 V analog input range for the DAS-800; nine unipolar and bipolar, software-selectable analog input ranges for the DAS-801 and

DAS-802. On-board 8254 counter/timer circuitry, which you can use as a

hardware internal clock source and/or for general-purpose counter/timer I/O operations.

Software-selectable conversion clock source. Digital trigger. Hardware gate.

Four-word FIFO to store converted data: overrun detection logic to detect lost dam points.

Software-selectable interrupt source. Three bits of digital input.

. Four bits of digital output.

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Note:

DAS-800 boards are enhancements of DAS-8 boards; DAS-801 boards are enhancements of DAS-8 PGA boards; DAS-802 boards are enhancements of DAS-8 PGA/G2 boards. You can use application programs written to support the DAS-8 with the DAS-800, application programs written to support the DAS-8 PGA with the DAS-801, and application programs written to support the DAS-8 PGA/GZ with the DAS-802.

Supporting Software

You can use DAS-800 Series boards with the following software:

DASJOO Series standard software package

DAS-800 Series boards. Includes function libraries for writing

application programs under DOS in a high-level Microsoft QuickBasic and Microsoft Visual BasicTM for DOS, support files, utility programs, and language-specific example programs. Refer to more information.

the DAM00 Series Function Call Driver User’s Guide

- Shipped with

language

such as

for

l-2

ASO-

software package - The optional Advanced Software

Option for DAS-800 Series boards. Includes function libraries for writing application programs under Windows and DOS in a high-level language such as Borland@ C/C++, Borland Turbo Pascal@

for DOS and Windows, and Microsoft Visual Basic for Windows; support files; utility programs; and language-specific example programs. Refer to the

Guide

for more information.

DA&800 Series utilities

DA&BOO Series Function Cull Driver User’s

- The following utilities are provided as part

of both the DAS-800 Series standard software package and the

ASO- software package:

Confgurarion urilify

-The configuration utility (D800CFG.EXE) allows you to create or modify a configuration tile. The configuration tile indicates the settings of switches and jumpers on the board and provides other configuration information. This information is used by the DAS-800 Series Function Call Driver and other software packages to perform the board’s I/O

Overview

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operations. Refer to page 3-9 for more information about the configuration utility.

Control Panel

-The Control Panel allows you to perform operations on DAS-800 Series boards, without programming. It provides a quick way to test your board and monitor

your I/O

operation. Two versions of the Control Panel are available:

CTL800.EXE (for DOS) and CTLBOOW.EXE (for Windows).

Refer to Chapter 5 for more information about the Control Panel.

Calibrafion uriliry

- The calibration utility (CALSOO.EXE) allows you to calibrate the analog input circuitry of DAS-800 Series boards. Refer to Chapter 6 for more information about the calibration utility.

. DAM300 Series custom controls

programs in Visual Basic for Windows. Refer to the Custom

. Data acquisition and analysis application software -

Controls User’s Guide

- Help you to write application

VisualDAS

for more information.

Many menu-driven, integrated software packages are available for DAS-800 Series boards, including VIEWDAC?, EASYEST LXa’, and EASYEST AGW. In addition, programming tools, such as the ASYST@ scientific and engineering programming

language, are

available to help you customize your own application program.

Note:

If you use VIBWDAC!, EASYEST LX / AG, or ASYST to

program your DAS-800 Series board, you must use the DA&800

Series External Driver, which is shipped as part of the DAS-800 Series standard software package. Refer to Appendix C for information on using the DAS-800 Series External Driver.

. DAS-800 Series register I/O map - If you cannot satisfy your

application’s requirements with the available software packages and you are an experienced programmer, you may be able to program

your DAS-800 Series

board

through direct register I/O instructions.

Contact the factory for more information.

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Accessories

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The following accessories are available for use with DAS-800 Series boards:

. STC-37 screw terminal connector - For

all DAS-800 Series boards, provides 37 screw terminals that allow you to access the functions of the board; connects directly to the DAS-800 Series board without a cable.

STA-08 screw terminal accessory - For the DAS-800 board

provides screw terminals that allow you to access the functions of the board; provides a breadboard area with power and additional screw terminals to access the user-designed circuitry.

. STA-08PGA screw terminal accessory

- For the DAS-801 and DAS-802 boards only, provides screw terminals that allow you to access the functions of the

board;

provides a breadboard area with

power and additional screw terminals to access the user-designed circuitry.

. EXP-16 and EXP-16/A expansion boards

- Sixteen-channel

multiplexer and signal-conditioning expansion boards; provide cold

junction compensation (CJC) for thermocouples and

switch-selectable gains ranging from 0.5 to 2000.

. EXP-GP expansion board

- An 8-channel signal-conditioning

expansion board; connects to RTDs, thermistors, strain gages, and

other variable resistance sensors; provides CJC for thermocouples and switch-selectable gains of 1, 10, 100, and 1000 or 2.5.25.250, and 2500.

only,

1-4

. MB Series modules and backplanes

- MB Series modules are high-performance, signal-conditioning modules that measure thermocouple, RTD, strain gage, voltage, and current inputs and are installed in MB Series backplanes. MB Series backplanes provide

screw terminals for connecting the high-level analog I/O signals.

Overview

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. STA-SCM8

screw terminal accessory - Allows you to

connect a DAS-800 Series board to up to four MB-02 backplanes; provides screw terminals that allow you to access the functions of the board; provides a breadboard area with power for the user-designed circuitry.

. C-1800 cable

-Unshielded, la-inch cable with a 37-pin connector on each end: allows you to connect a DAS-800 Series board to an STA-08, STA-08PGA, EXP-16, EXP-16/A, or EXP-GP.

. S-1800 cable - Shielded, la-inch cable with a 37-pin connector on

each end; allows you to connect a DAS-800 Series board to an STA-08, STA-OBPGA, EXP-16, EXP-16/A, or EXP-GP.

. CB-MB1

cable

- Cable with a 37-pin connector on one end and a 26-pin-connector on the other end; allows you to connect a DAS-800 Series board to an MB-01 or MB-02 backplane.

. C-2600 cable

- An la-inch cable with a26-pin connector at each end; allows you to connect an STA-SCM8 screw terminal accessory to an MB-02 backplane.

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Functional Description

This chapter describes the following features of DAS-800 Series boards: . Analog input features

. Digital I/O features . Counter/timer I/O features

Interrupts

. Power

A functional block diagram of a DAS-800 Series board is shown in

Figure 2- 1.

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Figure 2-1. DAS-800 Series Functional Block Diagram

Analog Input Features

DAS-800 Series boards use a 12-bit, successive approximation analog-to-digital converter (ADC) with integral sample and hold. The ADC provides 1Zbit resolution fl least significant bit (LSB), providing an effective accuracy of 11 bits. The ADC converts one sample every 25 ks, providing a maximum conversion frequency of 40 kHz.

2-2

Functional Description

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Channel Configuration

DAS-800 Series boards contain eight on-board analog input channels. The following subsections describe the input configurations supported for each channel, the gains the methods of specifying a channel or channels for an analog input operation.

On the DA%801 and DAS-802, you can configure each channel as either

single-ended or differential. The differences between a single-ended and a

differential input configuration are described as follows:

and

input ranges supported for each channel, and

. Single-ended

you are measuring relatively high-level signals (greater than 1 V), if the source of the input signal is close to the board (less than two feet), or if all input signals are referred to a common ground. This configuration does not provide common-mode noise rejection.

. Differential

are measuring low-level signals, if high source resistances (greater than 100 D) exist, or if common-mode voltages exist between the voltage source and the host’s chassis ground. In a differential configuration, a separate positive and negative terminal is provided for each channel. Any common-mode noise that is picked up equally on both inputs is rejected because the difference is zero.

You specify the input configuration by setting switches on the board. The switches connect or disconnect the inverting side of the input signal to low-level ground. Refer to page 3-16 for information on setting the switches.

Notes: On the DAS-800, the

single-ended; ah signals are referred to a single low-level ground.

- A single-ended input configuration is appropriate if

- A differential input configuration is appropriate if you

channels are always configured as

If you are using BXP-16, EXP-16/A, or EXP-GP expansion MB-02 backplanes, you must configure the on-board analog input channels associated with the expansion boards or backplanes as

single-ended.

boards or

2-3

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Gains and Ranges

A DAS-800 board measures analog input signals in the range of f5 V. Each DAS-801 or DAS-802 board contains a programmable gain

amplifier (EGA), which allows you to measure analog input signals in one of several software-selectable unipolar and bipolar ranges. For each channel on a DAS-801 or DAS-802 board, you can specify one of five bipolar and four unipolar analog input ranges.

Table 2-1 lists the gains supported by DAS-800 Series boards and the analog input voltage range for each gain.

Table 2-l. Supported Gains

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Functional Description

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Note:

with protection against signals outside the specified analog input range. All DAS-800 Series boards can tolerate voltages up to f35 V and transients of several hundred volts without damaging the board.

When measuring signals at differential inputs, DAS-801 and DAS-802 boards can tolerate common-mode voltages up to f35 V and transients of several hundred volts without damaging the board; however, for normal operation of the board, make sure that the common-mode voltage is no more than 12 V - ((C / 2) x differential input voltage.

Channel Selection

You can use DAS-800 Series boards to acquire data from a single analog input channel or from a range of contiguous, on-board analog input channels using automatic channel scanning. These two methods of channel selection are described as follows:

Analog input channels on DAS-800 Series boards are provided

V,),

Single

initiate a conversion.

channel - You use software to specify a single channel and

where G is tbe gain and

is the

. Automatic channel scanning

and last channels in a range of contiguous, on-board channels (0 to 7).

The channels are sampled in order from first to last; the hardware

automatically increments the analog input multiplexer address shortly after the start of each conversion. When the last address is reached,

the multiplexer returns to the start address and the channels are

sampled again. For example, assume that the start channel is 4, the

stop channel is 7, and you want to acquire five samples. Your program reads data first from channel 4, then from channels 5, 6, and 7, and finally from channel 4 again.

The start channel can be higher than the stop channel. For example,

assume that the start channel is 7, the stop channel is 2, and you want

to acquire five samples. Your program reads data first from channel 7,

then from channels 0, 1, and 2, and finally from channel 7 again.

When using automatic channel scanning, all contiguous, on-board

channels must have the same gain (analog input range).

- You use software to specify the first

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Note:

that includes channels on expansion boards or MB Series backplanes, you can create a group of consecutive channels through software. tn addition, if your application requires non-consecutive channels or different gains for each channel, you can create a channel-gain list through software. The DAS-800 Series Function Call Driver provides functions for creating a group of consecutive channels or channel-gain list; refer to the

User’s you to set up a group of consecutive channels or channel-gain list; refer to Chapter 5 for more information. You can also set up a group of consecutive channels or channel-gain list using DAS-800 Series custom controls; refer to

Guide

Automatic channel scanning is a hardware feature. The functions used to create a group of consecutive channels or a channel-gain list emulate automatic channel scanning through software. Therefore, the maximum attainable conversion frequency is reduced when using a group of consecutive channels or a channel-gain list.

Channel Expansion

If you want to acquire

Guide

for more information. The Control Panel also allows

the VisualDAS Custom Controls User’s

for more information.

data

from a range of multiple channels

DAM00 Series Function Call Driver

Z-6

If you require additional analog input channels or signal conditioning for transducer inputs, you can use any combination of up to eight 16-channel EXP-16 expansion boards, eight 16-channel EXP-16/A expansion boards, and/or eight X-channel EXP-GP expansion boards to increase the number of available channels to 128. You can also use up to four MB-02 backplanes to increase the number of available channels to 68.

For the EXP-16, EXP-16/A. and EXP-GP, you attach the expansion boards in a daisy-chain configuration using the S-1800 or C-1800 cable. The first expansion board in the daisy chain is associated with on-board channel 0, the next expansion board is associated with

1, and so on. You specify the associated on-board channel by setting a

jumper on each expansion board. You can access any unused on-board

channels by attaching an STA-08 or STA-OBPGA screw terminal accessory to the last expansion board in the daisy-chain configuration.

on-board

Functional Description

channel

chapOZ.frm Black 7

Figure 2-2 illustrates a daisy-chain configuration of two EXP-16 expansion boards, one EXP-GP expansion board, and an STA-08 screw terminal accessory connected to a DAS-800 board.

Omboard channel 0

I I I I r I I I

D&3-600

Board

EXP.16

Figure 2-2. Channel Expansion

On-board On-board channel 1

EXP-16

channal2 chsnnsls 3 to 7

EXPQP

For information on attaching multiple MB-02 backplanes, refer to the ME Series User’s Guide.

Notes:

You must specify a single-ended input configuration for all

on-board channels associated with channels on EXP-16, EXP-16/A. or

EXP-GP expansion boards or MB-02 backplanes.

If you are using EXP-16, EXP- 16/A, or EXP-GP expansion boards or MB Series backplanes, the digital output lines of the DAS-800 Series board select the particular channel on the expansion board or backplane to read.

On-board

STA.08

Refer to the appropriate expansion board documentation for more information about the EXP-16, EXP-16/A, and EXP-GP expansion boards. Refer

to the ME Series User’s Guide

for more information about

the MB-02 backplane.

2-7

chap02-.frm Black 8

Conversion Clock Sources

The conversion clock source determines when each analog-to-digital (A/D) conversion is initiated. DAS-800 Series boards provide the following software-selectable conversion clock sources:

. Software -When using a software conversion clock, the host

computer issues a command to initiate a conversion. The host polls the board to determine if the conversion is complete. When the conversion is complete, the host reads the data from the ADC and returns the value. If the host reads data before the conversion is complete, the data will be invalid.

Software-initiated conversions are suitable for measuring DC voltages; however, in applications where you must accurately control the sampling rate (as when measuring time-varying signals), it is recommended that you use either an internal or an external hardware conversion clock source.

At power-up or system reset, the board assumes that conversions will be initiated through software.

. Hardware (internal clock source) -The internal clock source uses

the on-board 8254 counter/timer circuitry and a crystal-controlled

I MHz time base. The 8254 counter/timer circuitry is normally in an

idle state. When you start an analog input operation, a conversion is initiated immediately. The 8254 is loaded with its initial count value

and begins counting down. When the 8254 counts down to 0, another conversion is initiated and the process repeats.

Because the 8254 counter/timer uses a 1 MHz time base, each count represents 1 ps. For example, if you load a count of 25, the time

interval between conversions is 25 ps: if you load a count of 65536, the time interval between conversions is 65.536 ms.

2-6

Functional Description

chap02Lfrm Black 9

The 8254 contains three counter/timers: C/TO, Cnl, and C/r2. If you are using a hardware internal clock source, the time base logic uses C/T1 and C/r2 in either normal or cascaded mode, as follows:

- Normal

of the 8254 counter/timer circuitry. Each time C/r2 reaches terminal count, a conversion is initiated. The time interval between conversions ranges from 25 FLS to 65.536 ms.

Cascaded Mode

C/r2 and C/r1 of the 8254 counter/timer circuitry. When CK2 counts down to 0, CR1 decrements by 1. Cn2 is reloaded with its count value and begins counting down again. Each time C/r2 counts down to 0, Cm1 decrements by 1. Each time both C/r2 and CR1 reach terminal count, a conversion is initiated. The time interval between conversions ranges from 25 ps to 1.2 hours.

Note:

system reset, the DA%800 board connects the clock input of C/r2 to the CPU bus clock divided by two. If you specify a hardware internal clock source through software, the DAS-800 board connects the clock inputs of C/T1 and CD2 to the 1 MHz time base. The DAS-801 and DAS-802 boards always connect the clock input of C/f2 to the

1 MHz time base.

Refer to page 2-17 for more information about the 8254 counter/timer circuitry.

Mode

- A software-selectable count is loaded into C/r2

- A software-selectable count is divided between

For compatibility with the DAS-8 board, on power-up or

. Hardware (external clock source) - An external clock source is

useful if you want to sample at rates not available with the 8254 counter/timer circuitry, if you want to sample at uneven intervals, or if you want to sample on the basis of an external event. An external clock also allows you to synchronize conversions on multiple boards to a common timing source.

2-9

chap02-.frm Black 10

The external clock source is an externally applied TTL-compatible signal, which you attach to the INT-IN / XCLK pin (pin 24) of the main I/O connector. When you start an analog input operation, conversions are soume (and at every subsequent falling edge of the external clock

source), a conversion is initiated.

armed.

At the next falling edge of the external clock

Note:

use the INT-IN / XCLK pin (pin 24) to generate interrupts.

Figure 2-3 illustrates how conversions are initiated when using an internal

and an external clock source. (Note that Figure 2-3 assumes that you are not using a hardware trigger; refer to Figure 2-4 for an illustration of conversions when using a hardware trigger.)

If you are using a hardware external clock source, you cannot

2-l 0

Figure 2-3. Initiating Conversions

Functional Description

chap02Lfrm Black 11

Notes: The ADC acquires data at a maximum of 40 kHz (one sample

every 25 ns). If you are using a hardware external clock, make sure that

the clock does not initiate conversions at a faster rate than the ADC can

handle.

To achieve full measurement accuracy when using a gain of 500, you

should limit me conversion frequency to a maximum of 25 kHz (one

sample every 40 its).

If you are acquiring samples from multiple channels. the maximum

sampling rate for each channel is equal to 40 kHz divided by the number

of channels.

The rate at which the computer can reliably read data from the board

depends on a number of factors, including your computer, the operating

system/environment, whether you are using expansion boards, the gains

of the channels, and software issues.

You can synchronize conversions on multiple DAS-800 Series boards to a

common, externally applied conversion clock. In addition, you can use a

DAS-801 or DAS-802 board as a timing master; the output of the OUT1 pin (pin 5) on the main I/O connector of the master board acts as an

external hardware conversion clock to any additional boards. You can use external circuitry, such as CEO on the 8254, to divide the rate of the master clock; this allows you to synchronize conversions on the

additional hoards to a rate different from that of the master board. Refer to page 4-13 for more information on synchronizing conversions on multiple

boards.

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chap02_.frm Black 12

Triggers

A trigger is an event that must occur before a DAS-800 Series board starts an analog input operation. You can use one of the following trigger

sources to trigger aa analog input operation:

. Software - When you start the analog input operation, conversions

begin

immediately.

. Hardware - You connect a digital trigger signal to the digital input

IP 1 /TRIG pin (pin 25) of the main I/O connector. The trigger event occurs when the board detects a rising edge on IP1 /TRIG.

The actual point at which conversions begin depends on whether you

are using an internal or external clock soorce. These considerations are described as follows:

Internal clock

source - The 8254 counter/timer circuitry remains idle until the trigger event occurs. When the trigger event occurs, the

board

initiates the first conversion immediately.

- Enrernal

clock

source - Conversions are armed when the trigger event occurs. At the next falling edge of the external clock source, the board initiates the first conversion.

2-12

Functional Description

chap02-.frm Black 13

Figure 2-4 illustrates how conversions are started when using a hardware trigger.

External Clock source

Figure 24. Initiating Conversions

with

a Hardware Trigger

2-13

chap02-.frm Black 14

Hardware Gates

A hardware gate is an externally applied digital signal that determines whether conversions occur. You connect the gate signal to the IPl /TRIG pin (pin 25) on the main I/O connector. DAS-800 Series boards support a positive gate only. Therefore, if the hardware gate is enabled and the

signal to IPl /TRIG is high, conversions occur; if the signal to IPl /

TRIG is low. conversions are inhibited.

Note:

You cannot use the hardware gate with a hardware trigger. However, the gate signal itself can act as a trigger. If the gate signal is low when the software starts the analog input operation, the board waits until the gate signal goes high before conversions begin.

When using the hardware gate, the way conversions are synchronized depends on whether you are using a hardware external clock or a hardware internal clock, as follows:

. External

clock

- The signal from the external clock continues

uninterrupted while the gate signal is low; therefore, conversions are

synchronized to the external clock.

. Internal clock - The 8254 does not count while the gate signal is low.

Whenever the gate signal goes high, the 8254 is loaded with its initial count value and starts counting; therefore, conversions are synchronized to the gate signal.

Figure 2-5 illustrates how to use the hardware gate with both an external clock and an internal clock.

2-14

Functional Description

chap02-.frtn Black 15

sonware starts ths

operation -b

3rd convmsion

2nd conversion

/ /

p-r . . . . . . * . . . . .

at wnverslon , (Intcmsl clock)

Note:

analog trigger, you can program an analog trigger through software, using one of the analog input channels as the trigger channel. The DAS-800 Series Function Call Driver provides functions for an analog trigger; refer to

the DAS-800 Series Funciion Call Driver User’s Guide

information. The Control Panel also allows you to set up an analog trigger; refer to Chapter 5 for more information. You can also set up an analog trigger using DAS-800 Series custom controls; refer to the

VisualDAS

2nd mnvwston (Inkmel clock)

Figure 2-5. Hardware Gate

t 3rd l2dverslon (Internal clock)

4th converslbn (Internalclock)

A-

Although DAS-800 Series boards do not provide a hardware-based

for more

Custom

Controls Lrser’x Guide

for more information.

2-I 5

chapOZ.frm Black 16

Data Transfer

Because DAS-800 Series boards do not support DMA (Direct Memory Access), data is always transferred from a DAS-800 Series board to the host computer’s memory through an output port. Data can be transferred as either a foreground process or a background process. If data is transferred in the background, the end-of-conversion interrupt must be enabled so that the board can notify the host computer when new data is available; refer to page 2-25 for more information about interrupts. If data is transferred in the foreground, interrupts are not required.

DA%800 Series boards contain a four-word, first-in, first-out memory location (FIFO). When you initiate conversions under hardware control, using an internal or external clock source, the result of each conversion is automatically stored in the FIFO.

Note:

logic is automatically disabled and the FIFO is emptied.

The FIFO increases the maximum attainable conversion frequency by

increasing the maximum software interrupt latency allowed by a factor of four (up to the maximum conversion frequency of 40 kHz).

If the conversion frequency is too fast or if the time required to service the interrupt is too long, the hardware may perform more than four conversions before the converted data is read. The hardware can detect this condition and generate an error to indicate that unread data in the FIFO was overwritten and samples were lost.

Panel, or Custom Controls, the operation of the FIFO is transparent. The Function Call Driver, Control Panel, or Custom Controls software

When you use software to initiate conversions, the FIFO control

Note:

performs the data transfer.

When using the DAS-800 Series Function Call Driver, Control

2-I 6

Functional Description

chap02-.frm Black 17

Digital l/O Features

DAS-800 Series boards contain three digital input lines and four digital output lines. The digital input lines are associated with the IPI /TRIG, IP2, and IP3 pins on the main I/O connector; the digital output lines are associated with the OPI. OP2. OP3. and OP4 pins on the main I/O connector. Logic 1 at a pin indicates that the input/output is high (greater than 2.0 V); logic 0 at a pin indicates that the input/output is low (less than 0.8 V).

The digital input lines are compatible with TTL-level signals. If no signal is connected to a digital input line, the input appears high (logic 1).

You can use the digital input and output lines for any general-purpose task, with the following exceptions:

. If you are using an expansion board for an analog input operation, the

four digital output lines control the multiplexem on the expansion boards to determine the expansion board channel that is acquiring data; in this case, you cannot use the digital output lines for general-purpose digital output operations.

. If you are using an external digital trigger or hardware gate, you must

use the IPI /TRIG pm to attach the trigger/gate signal: in this case, you cannot use IPl /TRIG for general-purpose digital input operations.

8254 Counter/Timer Circuitrv

Each DAS-800 Series board contains 8254 counter/timer circuitry; the

8254 contains three counter/timers: C/IO, Cnl, and W2. C/IO is always available for general-purpose tasks. If you are using a

hardware internal clock source for an analog input operation, both C/T1

and C/T2 of the 8254 counter/timer circuitry are dedicated to internal functions and cannot be used for general-purpose tasks. If you are using a

hardware external clock source, ClrO, C/Tl, and C/I’2 are always

available for general-purpose tasks.

2-17

chap02-.frm Black 18

C/TO and C/T1 have a clock input pin on the main I/O connector; all counter/timers have a gate input pin and an output pin on the main I/O connector. You can attach a clock source (0 to 10 MHz) to the clock input pins (CLKO and CLKl). Pull-up resistors of 3.3 ka are provided on the three gate input pins (GATEO, GATEl, and GATE2); therefore, the gates

appear enabled if no signal is attached to the gate inputs. You can use the

output pins (OUTO, OUTl, and OUT2) for pulse or frequency outputs.

Notes: For compatibility with the DAS-8 board, on power-up or system reset, the DAS-800 board connects the clock input of CF2 to the CPU bus clock divided by two. If you specify a hardware internal clock source through software, the DA%800 board connects the clock inputs of C/T1 and C/r2 to the 1 MHz time base. The DAS-801 and DAS-802 boards

always comect the clock input of Cn2 to the 1 MHz time base. You can use the OUT1 pin of a DAS-801 or DAS-802 board to

synchronize conversions on multiple boards. Refer to page 4- 13 for more information.

The CLKl, GATEl, and GATE2 pins are provided for compatibility with

DAS-8, DAS-8 PGA, and DAS-8 PGA/G2 boards on power-up or system reset. If you specify a hardware internal clock source through software, you cannot use these pins.

2-i 6

Functional Description

chap02Lfrm Black 19

You can program the 8254 counter/timer circuitry to operate in one of the following counter/timer modes:

. Pulse on terminal count (Mode 0) - This mode is useful for event

counting or for programming a time delay. The software forces the output low. On the next clock pulse after the software writes the

initial count value, the counter is loaded. When the counter reaches zero, the output goes high and remains high until the software writes a new count value. Note that the output does not go high until n + 1 clock pulses after the initial count is written, where n indicates the loaded count.

A high gate input enables counting; a low gate input disables counting. The gate input has no effect on the output. Note that an initial count value written while the gate input is low is still loaded on the next clock pulse.

Figure 2-6 illustrates pulse on terminal count mode.

clock pulse

softwar* tomes output low --)

output

Figure 2-6. Pulse on Terminal Count Mode

2-19

chapO2Lfrm Black 20

. Programmable one-shot (Mode 1) -This

mode is useful for

providing a hardware-triggered delay or one-shot pulse. The output is

initially high. A trigger loads the initial count value into the counter. At the next clock pulse after the trigger, the output goes low and remains low until the counter reaches zero. (The one-shot pulse is n clock cycles in duration, where n indicates the loaded count.) After the counter reaches zero, the output goes high and remains high until the clock pulse after the next trigger; this makes the one-shot pulse retriggerable.

You do not have to reload the count into the counter. The gate input

has no effect on the output. Writing a new count to the counter during a one-shot pulse does not affect the current one-shot

pulse.

Figure 2-7 illustrates programmable one-shot mode.

Z-20

output

3 2 1

Figure 2-7. Programmable One-Shot Mode

chap02Lfrm Black 21

Rate generator

(Mode 2) -This mode is useful for generating a real-time clock interrupt. The output is initially high. A trigger loads the initial count value into the counter. At the next clock pulse after the trigger, the counter starts counting down. When the counter reaches one, the output goes low for one clock pulse and then goes high again. The counter is then reloaded with the initial count value and the process repeats.

A high gate input enables counting; a low gate input disables counting. If the gate goes low during an output pulse, the output is set high immediately; this allows you to use the gate input to synchronize the counter.

Writing a new count to the counter while counting does not affect the current counting sequence. In this mode, a count of 1 is illegal.

Figure 2-8 illustrates rate generator mode.

ClOdI pulse

Figure 2-8. Rate Generator Mode

2-21

chap02-.frm Black 22

. Square-wave generator (Mode 3) -This mode is useful for

square-wave generation. The output is initially high. A trigger loads the initial count value into the counter. At the next clock pulse after the trigger, the counter starts counting down. When half the initial count has elapsed, the output goes low for the remainder of the count. When the total count elapses, the counter is reloaded with the initial count value, the output goes high again, and the process repeats. If the initial count is odd, the output is high for (n + 1) / 2 counts and low for (n - 1) / 2 counts, where n indicates the loaded count.

A high gate input enables counting; a low gate input disables counting. If the gate goes low while the output is low, the output is set high immediately: this allows you to use the gate input to synchronize the counter.

Figure 2-9 illustrates square-wave generator mode.

2-22

output

1 I I

14 3

Figure 2-9. Square-Wave Generator Mode

2 1

Functional Description

chap02-.frm Black 23

Clock

. Software-triggered strobe

Writing the initial count through software loads the initial count value into the counter at the next clock pulse, but the counter does not start counting. At the next clock pulse, the counter starts counting down. When the counter reaches zero, the output goes low for one clock pulse and then goes high again. Note that the output does not go low until n + 1 clock pulses after the initial count is written, where n indicates the loaded count.

A high gate input enables counting: a low gate input disables

counting. The gate input has no effect on the output. Figure 2- 10 illustrates software-triggered strobe mode.

pulse

output

(Mode 4) -The output is initially high.

Figure 2-10. Software-Triggered Strobe Mode

2-23

chap02-.frm Black 24

Hardware-triggered strobe (Mode

A rising edge of the gate input acts as a trigger. The counter is loaded with the initial count value on the next clock pulse after the trigger, but the counter does not start counting. At the next clock pulse, the counter starts counting down. When the counter reaches zero, the output goes low for one clock pulse and then goes high again. Note that the output does not go low until n + 1 clock pulses after the trigger event occurs, where n indicates the loaded count.

After the trigger event occurs, the gate input has no effect on the output. Writing a new value during counting does not affect the counting sequence.

Figure 2- 11 illustrates hardware-triggered strobe mode,

5) - The output is initially high.

Clock

pulse

flislng edge of ate input act* as I rf gger -

output

Figure 2-11. Hardware-Triggered Strobe Mode

Refer to 8254 documentation for information on programming the 8254 counter/timer circuitry for general-purpose tasks. Table 2-2 lists several companies that provide documentation for the 8254.

Counter Is loaded wllh

flnldal CO”“t value of 3

2-24

Functional Description

chap02-.frm Black 25

Table 2-2. Sources for 8254 Documentation

Company 1 Address and Telephone Number 1

lntel Corporation Literature Sales

P.O. Box 7641 Mt. Prospect, IL 60056-7641

Interrupts

Newbridge

Microsystems

603 March Road Kanata, Ontario Canada K2K 1X3 (613) 592-0714 (800) 267-7231

DAS-800 Series boards can generate interrupts from one of the following interrupt sources:

. External interrupt

- An interrupt is generated when a rising edge is applied to the INT-IN / XCLK pin (pin 24) on the main I/O connector.

Note: If you are using an external interrupt, you cannot use the

INT-IN

/ XCLK pin (pin 24) to connect a hardware external clock

source.

. End-of-Conversion (EOC) interrupt

- An interrupt is generated

when an A/D conversion is complete.

The interrupt source is software-selectable. At power-up or system reset, the board assumes that the interrupt source is an external interrupt.

2-25

chapOZ_.frm Black 26

You can select only one interrupt at a time. If you are using an interrupt, you must select the interrupt level (2, 3,4,5,6, or 7) using a jumper on the board. If you are not using an interrupt, you can disable interrupts using a jumper on the board. Refer to page 3-17 for more information.

Power

Note:

enabled and the interrupt source must be an EOC interrunt.

If an interrupt condition is satisfied, an on-board flip-flop is set. If

interrupts are enabled (through both hardware and software), the board generates an interrupt to the host, driving the selected host interrupt line to an active state.

The analog circuitry on the DAS-800 board is powered by the f12 V of the host computer. The DAS-801 and DAS-802 boards contain a DC/DC converter to provide power to the analog circuitry.

Note:

computers do not have a -12 V power supply. If your computer does not have a -12 V power supply, you cannot use a DA%800 board.

If you are acquiring data in the background, interrupts must be

Many laptop computers and other types of battery-operated

2-26

The host computer can provide power for EXP-16, EXP- 16/A, and EXP-GP expansion boards and MB Series backplanes: however, certain power limitations exist. Table 2-3 lists the maximum number of expansion boards

and

backplanes that the host can power.

Functional Description

chap02-.frm Black 27

Table 2-3. Expansion Board / Backplane Power Limitations

Expansion Board / Maximum Number Backplane Powered by Host

If you want to use more expansion boards or backplanes than indicated in Table 2-3, you must connect an external power supply to the additional expansion boards or backplanes. Refer to the appropriate expansion board documentation for information on providing external power to EXP- 16. EXP-16/A, and EXP-GP expansion boards. Refer to theME

Guide

for information on providing external power to MB Series

Series User’s

backplanes.

2-27

chap02-.frm Black 28

chap03-.frm Black 1

Setup and Installation

This chapter describes how to install the software in your computer,

unpack and inspect the board, configure the board, and install the board in

your computer.

If you are familiar with switches and jumpers and with the items that are

configurable on DAS-800 Series boards, you can use Figure 3-1 as a

quick reference for configuring a DA%800 board and Figure 3-2 as a

quick reference for configuring a DAS-801 or DAS-802 board. If you need additional information, refer to Configuring the Board on page 3-8.

3-1

chap03-.frm Black 2

BASE ADDRESS

::I

ilOWW q 300H

I”ierrup\ level (X E disabled)

Figure 3-1. DAS-300 Board

3-2

Setup and Installation

chap03-.frm Black 3

BASE ADDRESS

’ 2 3 4 5 6 ’

~~~fjfl~~[

Base dddnss b”,“&&:“,,=d

OWWOl = WBH OWWIO z OlOH

ilOWW = 300H 1111111 s3FBH

SWlwl fhckS2

OOOOI

1 2 3 4 5 6 7

Input ConfiguratIon

(On rslngleemdsd, Switch 1 I Channel

Swllch 2 E Channel Stitch 3 = Channel Swllch 4 = Channel Switch 5 z Channel Switch 6 q Channel Switch 7 z Channel Swllch 8 = Channel

I I

Interrupt Ioval (X q disabled)

Off L dlfferenUsl)

Figure 3-2. DAS-8011802 Board

3-3

chap03-.frm Black 4

Installing the Software

This section describes how to install the DA%800 Series standard software package and how to install the ASO- software package from both DOS and Windows. The contents of these software packages are described as follows:

. DAS-800 Series standard software package

-This is tbe software package that is shipped with DAS-800 Series boards; it includes the following:

- The Control Panel, running under DOS, which allows you to test

all features of DAS-800 Series boards before programming.

Libraries of functions for Microsoft QuickBasic, Microsoft Professional Basic, and Microsoft Visual Basic for DOS.

- Support files, containing such program elements as function

prototypes and definitions of variable types, which are required by the functions.

Utility programs, running under DOS, that allow you to configure and calibrate DAS-800 Series

Language-specific example programs.

The External Driver, which is required for programming with

boards.

VIEWDAC, EASYEST LX 1 AG, and ASYST.

ASO- software package

- This is the optional Advanced

Software Option for DAS-800 Series boards. You purchase the

ASO- software package separately from the board; it includes the

following:

3-4

The Control Panel, running under DOS and Windows, which allows you to test all features of DAS-800 Series boards before programming.

Libraries of functions for Microsoft C/C++, Borland C/C++, and Borland Turbo Pascal.

Setup and Installation

chap03-.frm Black 5

Dynamic Link Libraries (TILLS) of functions for Microsoft Visual Basic for Windows, Microsoft QuickC for Windows, Microsoft Visual C++, and Borland Turbo Pascal for Windows.

Support files, containing program elements, such as function prototypes and definitions of variable types, that are required by the functions.

Utility programs, running under DOS and Windows, that allow you to configure and calibrate DAS-800 Series boards.

Language-specific example programs.

Note: To install other software packages, refer to the documentation supplied with the software package.

Installing the DAS-800 Series Standard Software Package

To install the DAS-800 Series standard software package, perform the

following steps:

1. Make a back-up copy of the supplied disks.

2. Insert disk #1 into the disk drive.

3. Assuming that you are using disk drive A, enter the following at the DOS prompt:

A:install

The installation program prompts you for your installation preferences, including the name of the directory you want to copy the software to. It also prompts you to insert additional disks, as necessary.

4. Continue to insert disks and respond to prompts, as appropriate. The installation program expands any files that are stored in a

compressed format and copies all files to the directory you specified (DAS800 directory on hard disk C if you do not specify otherwise).

3-5

chap03-.frm Black 6

Installing the ASO- Software Package

DOS Installation

5. Review the following files:

FILESTXT lists and describes all the files copied to the hard disk by the installation program.

README.TXT contains information that was not available when this manual was printed.

This section describes how to install the ASO- software package from both DOS and Windows.

To install the ASO- software package from DOS, perform the following steps:

1. Make a back-up copy of the supplied disks.

2. Insert disk #l into the disk drive.

3. Assuming that you are using disk drive A, enter the following at the DOS prompt:

A:install

4. Continue to insert disks and respond to prompts, as appropriate. The installation program expands any files that are

compressed format and copies all files to the directory you specified

(AS0800 directory on hard drive C if you do not specify otherwise).

5. Review the following files:

FIL,ES.TXT lists and describes all the tiles copied to the hard disk by the installation program.

stored in a

3-6

Setup and Installation

chap03-.frm Black 7

Windows installation

- README.TXT contains information that was not available when this manual was printed.

To install the ASO- software package from Windows, perform the following steps:

1. Make a back-up copy of the ASO-Windows disk.

2. Insert the ASO-Windows disk into the disk drive.

3. Start Windows.

4. From the Program Manager menu, choose File and then choose Run.

5. Assuming that you are using disk drive A, type the following at the command line in the Run dialog box, and then select OK:

A:SETUP

The installation program prompts you for your installation preferences, including the name of the directory you want to copy the

software to.

6. Type the path name and select Continue. The installation program expands any files that are stored in a

compressed format and copies all files to the directory you specified (ASOSOthWINDOWS directory on hard drive C if you do not specify otherwise).

The installation program also creates a DAS-800 Series family group:

this group includes example Windows programs and help tiles.

7. Review the following files:

FILES.TXT lists and describes all the files copied to the hard disk

by the installation program.

README.TXT contains information that was not available when this manual was printed.

3-7

chap03-.frm Black 8

Umackina the Board

To prevent any damage to your DAS-800 Series board, perform the following steps when unpacking the board:

1. Remove the wrapped DAS-800 Series board from its outer shipping carton.

2. Making sure that your computer is turned OFF but grounded, hold the wrapped board in one hand while placing your other hand firmly on a metal portion of the computer chassis: this discharges any static electricity.

3. Carefully remove the board from its anti-static wrapping material. (You may wish to store the wrapping material for future use.)

4. Inspect the board for signs of damage. If any damage is apparent, arrange to return the board to the factory; refer to Chapter 7 for more information.

5. Check the remaining contents of your package against the packing list to ensure that your order is complete. Report any missing items to the factory immediately.

6. Once you have determined that the configure the board. Refer to the next section for configuration options.

Configuring the Board

You can configure the following items on DAS-800 Series boards: . Board type @AS-800, DAS-801, or DAS-802). . Base address (required by the DA%800 Series Function Call Driver

and other software packages to perform DAS-800 Series board operations).

. Use of C/T2 on the 8254 (cascaded or normal).

board is

acceptable, you can

3-8

Setup and Installation

chap03-.frm Black 9

Input range type (unipolar or bipolar) for a DAS-801 or DAS-802

board.

Input configuration (single-ended or differential) for each channel on a DAS-801 or DAS-802 board.

Interrupt level. Expansion boards used (information includes the number of

expansion boards, the gains used by channels on the expansion boards, and the channel used as the CJC sensor).

Note:

must also set switches on the expansion boards to specify the gains

used by channels on the expansion boards. Refer to the appropriate

expansion board documentation for information about setting the

switches.

You must specify the base address and input configuration by setting switches on the board and the interrupt level by setting a jumper on the board. In addition, if you intend to use your DAS-800 Series board with the DAS-800 Series Function Call Driver, Control Panel, custom controls, or External Driver or with any application program that requires a

configuration file, you must indicate all your configuration options in a configuration file.

The following sections describe how to create a configuration file and how to set the base address, input configuration, and intermpt level.

For EXP-16, EXP-16/A, and EXP-GP expansion boards, you

Creating a Configuration File

A default configuration tile called DASSOO.CFG is provided in both the DAS-800 Series standard software package and the ASO- software package. The factory-default settings inDAS8OGCFG are shown in Table 3-1.

3-9

chap03-.frm Black 10

Table 3-I. Default Configuration

Attribute

Board type

8254 Clr2 usage

~~~~~~~~~~~.~~~~~~~~ ~~~~~~~~~~~~~~~~

.:.:; .,.....,.,........./....,./.......... . .._ I ..j..........j.jj....j..... :.:../,.< ,...,.,.....,...,.,,....,.... :<.:.:. :.:.:.:.:.:,.,:.:.::.‘.~ :...:.:,..: .,... I:.

Channel 0 input configuration Single-ended

Default Configuration

1 DAS-800

Cascaded

3-10

Gain of EXP-GPs

Notes

’ The setting in the configuration file must match the settings of

the switches and jumper on the board.

‘The default base address for board 0 is 300H. If you are using

multiple DAS-800 Series boards, the default base address for board 1 is 308H, the default base address for board 2 is 310H.

and the default base address for board 3 is 318H.

3 For the purposes of the configuration file, an MB-02 backplane

is the same as anEXP-16 expansion board. Therefore, if you are using MB-02 backplanes instead of EXP-16 or EXP-16/A expansion boards, specify the number of MB-02 backplanes here.

1 [N/Al

Setup and Installation

chap03-.frm Black 11

4 If you are using MB-02 backplanes instead of EXP-16 or

EXP-16/A

channels are set to 1.

If the default settings are appropriate for your application and match the settings of the switches and jumper on the board, you can skip the rest of this section and proceed directly with installing the board. Refer to page 3-19 for information on installing the board.

If the default settings are not appropriate for your application, you must create a new configuration file or modify an existing configuration file to specify the correct configuration options. The DSOOCFG.EXE configuration utility, shipped with both the DAS-800 Series standard

software package and the ASO- software package, is provided for this

purpose.

To create or modify a configuration file, perform the following steps:

1. Invoke the configuration utility from DOS or Windows, as follows:

expansion boards, make sure that the gains of all

- If you are running under DEOOCFG.EXB configuration utility, enter the following at the DOS prompt:

DBOOCFG

wherefilename is the name of the configuration file you wish to create or modify.

If you are running under Windows,

Manager File menu. Enter the following in the box and select

OK:

D800CFG

wherefilename is the name of the configuration tile you wish to create or modify.

Make sure that you enter the correct path to DSOOCFG.EXE, or use the Browse button to find this file.

If the utility finds a configuration file namedfilename, it displays the opening menu screen with the name of the existing configuration file

shown. If the utility does not fmd a configuration file named

filename

DOS,

from the directory containing the

choose Run from the Program

3-11

chap03-.frm Black 12

filename, it displays the opening menu screen withfilename shown;

this file contains the default configuration options. If you do not enter a tile name, the utility assumes that you want to modify the default configuration file DASSOO.CFG.

Note:

Series standard software package and the ASO- software package, use the default configuration file DASSOO.CFG. If you intend to use the example programs, make sure that DASSOb.CFG exists and that the settings in DASSOO.CFG match the settings of your

2. On the opening menu screen, enter the number of DAS-800 Series boards you plan to configure (1 to 4).

The utility displays the configuration options for the first board (board 0). The number of the board is shown in the upper-left corner

of the menu box.

3. To modify any of the configuration options, use the arrow keys to highlight the option you want to change, press [Enter] to display a list of available settings, use the arrow keys to highlight the appropriate setting, and press @nter]. These instructions are summarized in the Commands/Status box at the bottom of the screen.

When the configuration options for this board are correct, press [N] to display the configuration options for the next board.

The example programs, provided with both the DAS-800

board.

3-12

4. If you modify the base address, input configuration, or interrupt level, you can press [S] to display the corresponding switch or jumper settings. You can use this display as a reference when setting the switches and jumper.

Note:

provided in the following sections. Refer to page 3-13 for information on setting the base address; refer to page 3-16 for information on setting the input configuration; refer to page 3-17 for information on setting the interrupt level.

Information on setting the switches and jumper is also

Setup and Installation

chap03-.frm Black 13

Setting the Base Address

5. After you modify the appropriate configuration options for all boards, press [Esc]. The utility asks if you want to save the new settings.

6. Press [Y] to save the settings to the configuration file you specified.

DAS-800 Series boards are shipped with a base address of 300H. If any of the address locations between 300H and 307H are being used by another resource in your system (including another DAS-800 Series board), you must reconfigure the base address using the base address switch block

(labeled Sl on the DAS-800 board: labeled S2 on DAS-801 and DAS-802 boards).

Note: The default base address settings in the configuration file are 300H for board 0,308H for board 1,310H for board 2, and 318H for board 3. Make sore that the switch settings for each board match the settings in the configuration tile for each board.

The base address switch block contains seven switches, labeled 1 through

7. Switch 1 corresponds to the most significant bit (MSB) of the base address; switch 7 corresponds to the LSB of the base address. The location of the base address switch block on the DAS-800 board is shown in Figure 3-l on page 3-2, the location of the base address switch block on the DAS-801 and DAS-802 boards is shown in Figure 3-2 on page 3-3.

You place a switch in the ON position (logic 0) by sliding the switch toward the top (numbered side) of the switch block. You place a switch in the OFF position (logic 1) by sliding the switch toward the bottom (unnumbered side) of the switch block.

Figure 3-3 illustrates the setting for a base address of 280H; switches 1

and 3 are in the OFF position and switches 2,4, 5, 6, and 7 are in the ON

position.

3-13

chap03-.frm Black 14

Figure 3-3. Setting the Base Address

Table 3-2 lists I/O addresses commonly used by IBM PC/XT, AT, and compatible computers. Determine an even boundary of eight I/O

addresses within the range of OOOH to 3FSH that is not being used by another resource in your system (including another DA%800 Series

board), and set the switches to the appropriate

base address.

Table 3-2. I/O Address Map (OOOH to 3FFH)

1 Address Range 1 Use

OOOH to OOFH

OAOH to OAFH

8237 DMA #I

NM1 mask register (XT)

200H to 2FFH Game /control

3-14

Setup and Installation

chap03_.frm Black 15

Table 3-2. l/O Address Map (OOOH to 3FFH) (cont.)

Address Range U-Se

238Hto

23BH Busmouse

3-15

chap03-.frm Black 16

Notes:

The DBOOCFG.EXE configuration utility allows you to set base addresses between 200H and 3FSH‘ only. Therefore. if you are using your DAS-800 Series board with software that requires a configuration file,

you must specify an even boundary of eight I/O addresses within the

range of 200H to 3F8H. If you press [S] after you specify the base address in the configuration

file, the configuration utility illustrates the appropriate switch settings for you; refer to page 3-9 for more information about the configuration utility.

Setting the Input Configuration

DAS-801 and DAS-802 boards are shipped with the input configuration for all channels set to single-ended. If this is not appropriate for your

application, you can reconfigure the input configuration on a

channel-by-channel basis using the input configuration switch block

(labeled Sl).

Note:

single-ended for all channels. Make sure that the switch settings match the settines in the confieuration file.

The default input configuration in the configuration file is also

3-16

The input configuration switch block contains eight switches, labeled 1 through 8. Switch 1 corresponds to channel 0: switch 2 corresponds to channel 1, and so on. The location of the input configuration switch block

on the DAS-80 1 and DAS-802 boards is shown in Figure 3-2 on page 3-3. You place a switch in the ON position (single-ended) by sliding the switch

toward the top (numbered side) of the switch block. You place a switch in the OFP position (differential) by sliding the switch toward the bottom (unnumbered side) of the switch block.

Figure 3-4 illustrates the setting for channels 0. 5, and 7 configured as single-ended (switches 1, 6, and 8 are in the ON position) and channels 1, 2, 3.4, and 6 configured as differential (switches 2,3,4, 5, and 7 are in the OFF position).

Setup and Installation

chap03-.frm Black 17

Figure 3-4. Setting the Input Conflguration

Notes: Since

configuration, they do not contain an input configuration switch block.

If you press [S] after you specify the input configuration in the

configuration file, the configuration utility illustrates the appropriate

switch settings for you; refer to page 3-9 for more information about the configuration utility.

DAM00 boards always use a single-ended input

Setting the Interrupt Level

DAM00 Series boards are shipped with interrupts disabled. If you want to use interrupts, you must set an appropriate interrupt level using jumper block Jl.

Notes:

disabled. configuration file.

If you intend to acquire data in the background, you must enable interrupts by setting an interrupt level.

The default interrupt level in the configuration file is also

Make

sure that the jumper setting matches the setting in the

Jumper block Jl contains seven pairs of jumper posts, labeled 2.3,4,5,6, 7, and X (disabled). You set the interrupt level by placing the supplied

jumper clip over the appropriate posts. Note that you can set only one

interrupt level at a time.

3-17

chap03-.frm Black 18

Figure 3-5 illustrates the setting for intermpt level 5; the jumper clip is over the posts labeled 5.

2 3

Figure 3-5. Setting the Interrupt Level

5 6

7 X

Table 3-3 lists interrupt levels commonly used by IBM PC/XT, AT, and compatible computers. Select an intemtpt level that is not being used by another resource in your system (including another DAS-800 Series board), and set the jumper to the appropriate interrupt level. It is

recommended that you select intemtpt level 3.4.5, or 7, if available.

Table 3-3. Interrupt Levels

Level Use

Reserved (XT), interrupts 8 to 15 (AT)

3-I 8

Note:

If you press [S] after you specify the interrnpt level in the

configuration file, the configuration utility illustrates the appropriate

jumper setting for you; refer to page 3-9 for more information about the

configuration utility.

Setup and Installation

chap03-.frm Black 19

Installing the Board

Before installing a DA%800 Series board in your computer, make sure

that the switches and jumper on the board are set appropriately and that the jumper and switch settings match the settings in the configuration file. Refer to page 3-8 for more information,

Caution:

damage to your computer.

To install the board, perform the following steps:

1. Tnm power to the computer and all attached equipment OFF,

2. Remove the computer chassis cover.

3. Select an available slot. The DAS-800 requires a single, short slot; the

4. Loosen and remove the screw at the top of the blank adapter plate,

5. Insert and secure the board connector in tbe selected slot.

6. Replace the computer chassis cover.

7. Plug in all cords and cables

8. Tnm power to the computer ON.

Installing or removing a board with the power ON can cause

DAS-801 and DAS-802 require a single, l/2-slot.

and then slide the plate up and out to remove.

After you install the DAS-800 Series board in the computer, you can attach an expansion board, if necessary, and wire the appropriate signals

to the board; refer to Chapter 4 for information. Before writing your application program, you can test the functions of the DAS-800 Series board using the Control Panel under DOS or Windows; refer to Chapter 5 for more information.

Refer to the documentation provided with your computer for more information on installing boards.

3-19

chap03-.frm Black 20

chap04-.frm Black 1

Cabling and Wiring

This chapter describes how to attach accessory and expansion boards to a

DAS-800 Series board, how to connect signals to a DAS-800 Series board, and how to synchronize conversions on multiple DAS-800 Series boards.

Note:

make sore that power to your computer and any accessories attached to

the DAM00 Series board are OFF.

Before you make any connections to a DAS-800 Series board,

Attaching Accessory and Expansion Boards

You attach an STC-37 screw terminal connector, STA-08 or STA-08PGA

screw terminal accessory, or EXP-16, EXP-16/A, or EXP-GP expansion

board to a DAS-800 Series board through the main I/O connector, a

37-pin, D-type connector that is labeled J2 on the board. The main I/O

connector and its pin assignments on a DAS-800 board are shown in

Figure 4- I: the main I/O connector and its pin assignments on a DAS-801

or DAS-802 board are shown in Figure 4-2. Refer to Appendix B for a

more detailed description of the pins.

4-1

chap04-.frm Black 2

Top of Board (Rear View)

VREF LLCOM Pin 16 . :

LLCOM Ph17 . LLCOM Ph16 . : LLCOM Ph15 . . LLCOM Ph14

LLCOM Pill13 . LLCOM DIQCOM Pill11 . : OP4

OP3 OP2

OPI

OUT2 OUT1 CLKl OUT0 CLKO

+12v

Pill 19 .

pin12 .’ pin10 . .

Pill9 . . Pln6 . . Pln7 . .

PI” 6 Pi” 6 Ph4 . : PI”3 . .

Phi2 . ,

Phi .

: ’

Ph 37 IN0 Pln 36 IN1 Pin 35 IN2

PM 34 IN3 Pill 33 IN4

Pln 32 IN6 Pill 31 IN6 Ph 30 IN7 Pln 29

Pin 26 Pln 27 IP3 Pill 26 IP2

Pln 25 IPliTRlG

Pin 24 INT-IN/XCLK

Pln 23 QATEP Pi” 22 QATEI Pill21

Pin 20 -12v

+6 v DIG COM

GATE0

Figure 4-l. Main l/O Connector on a DAM00 Board

4-2

Cabling and Wiring

chap04Lfrm Black 3

Top of Board (Rear View)

INO-

INlIN2IN3IN4INC

INSIN7DIG COM OP4 OP3 OP2

OPl OUT2

OUWCCLK

CLKI OUT0

CLKO

+12 V

Phl9 r-h “,_..Pill19 . : ;;:,j;

Pin17 l

P’n’6 ’ . P,“34

Pl”15 l

pl”‘2 l

Pill11 . Ph 10

Pln5 I . - lb;.;;

Ph4 . : Pl”3

Pl”2 ’ . Pi”20

Ph 1 .

. Ph35 . PI”33

. PI”30

. ; Pln29

^.~~ ^^

* . . . _” Ph 22

. PI”21

INO* IN1 + IN2+ IN3+ IN4+ INS+ IN&

IN7+ +5V

InO co+4 IP3 IP2

IPl/TRlG INT-lN/XCLK OATEZ QATEI OATEO

-12 v

Figure 4-2. Main I/O Connector on a DAS-801 or DAS-802 Board

You attach an STC-37 screw terminal connector directly to the main I/O connector on the DAS-800 Series board. You attach an STA-08 or STA-OXPGA screw terminal accessory or an EXP-16, EXF-16/A, or EXP-GP expansion board to the main I/O connector on the DAS-800 Series board using either a C-1800 or S-1800 cable. The C-1800 is tbe unshielded version of the cable; the S-1800 is the shielded version of the cable.

Attaching an STG37 Screw Terminal Connector

The screw terminals on the STC-37 screw terminal connector allow you to connect field wiring to a DAS-800 Series board. The screw terminals

are labeled from 1 to 37 and correspond directly to the functions of the

pins on the main I/O connector on the board. For example, since pin 24 is

assigned to the external clock source, use screw terminal 24 to attach a

hardware external clock. Refer to Appendix B for a complete list of pin

assignments.

4-3

chap04-.frm Black 4

To connect an STC-37 to a DAS-800 Series board, directly attach the 37-pin connector on the STC-37 to the main I/O connector on the DAS-800 Series board. Figure 4-3 illustrates tbe connection of an STC-37

to a DAS-800 Series board.

I-

DAS.600 Series Board

10000000000r

L? 0 0 0 0 0

0 0

I I

I 11g

gZ-W,“,“,“w Termlnal

Figure 4-3. Attaching an STC-37 Screw Terminal Connector

Attaching an STA-08 I STA-08PGA Screw Terminal Accessory

The screw terminals on the STA-08 screw terminal accessory allow you to connect field wiring to a DAS-800

STA-OSPGA screw terminal accessory allow you to connect field wiring to a DAM01 or DAS-802 name of the board function to which it is connected, the screw terminals correspond directly to the functions of the pins on the main I/O connector on the

board.

board;

Each screw terminal is labeled with the

the screw terminals on the

4-4

Cabling and Wiring

chap04-.frm Black 5

To connect an STA-08 / STA-OSPGA to a DAS-800 Series board, attach

one end

DAS-800 Series

of the S-1800 or C-1800

board and

the other end of tbe cable to the Jl connector

cable

to the main I/O connector on the

on the STA-08 / STA-OSPGA. Figure 4-4 illustrates the connection of an STA-08 / STA-OSPGA to a DAS-800 Series board.

Cl 900 /S-1900 Cable

DAS-BW Serlss Board

Ph 1

Figure 4-4. Attaching an STA-08 / STA-OBPGA Screw Terminal Accessory

Ph 1

m-r

STA.08 / STA.OBPGA

Attaching an EXP-16 or EXP-16/A Expansion Board

Each EXP-16 or EXP-16/A expansion board provides up to 16 analog

input channels (labeled 0 to 15). The EXP-16 and EXP-16/A provide three screw terminals for each channel: low-level ground (LL GND),

positive input (CHn HI), and negative input (CHn LO), where n indicates

the number of the channel.

m-L

To connect an EXP-16 or EXP-16/A to a DAS-800 Series

board,

attach one end of the S-1800 or C-1800 cable to the main I/O connector on the DAS-800 Series board and the other end of the cable to the Jl connector on tbe EXP-16 or EXP-16/A. Figure 4-5 illustrates tbe connection of an EXP-16 to a DAS-800 Series board.

4-5

chap04Lfrm Black 6

DAS-800 Ssrlea Board

Figure 4-J. Attaching an EXP-16 or EXP-16/A Expansion Board

Refer to the EXP-16 and EXP-16/A expansion board documentation for more information about these expansion boards.

Attaching an EXP-GP Expansion Board

Each EXP-GP expansion board provides up to eight analog input channels (labeled 0 to 7). The EXF-GP provides six screw terminals for each channel: positive current excitation (+IBXC), positive input (+SENSE), negative voltage excitation (-P), negative current excitation (-IEXC), negative input (-SENSE), and positive voltage excitation (+P).

To connect an EXP-GP to a DAM00 Series board, attach one end of the S-1800 or C-1800 cable to the main I/O connector on the DAS-800 Series board

and

the other end of the cable to the Jl connector on the EXP-GP. Figure 4-6 illustrates the connection of an EXP-GP to a DAS-800 Series board.

4-6

Cabling and Wiring

chap04-.frm Black 7

C-1200 / 5.1800 Gable

Ph 1

P,” 1

DAS.SW Sarles Board

Figure 4-6. Attaching an EXP-GP Expansion Board

’ \

Refer to the EXP-GP expansion board documentation for more information about this expansion board.

Attaching an MB Series Backplane

Refer to the MB Series

DAS-800 Series boards to MB Series backplanes.

User’s

Guide for information on connecting

Connecting Multiple Expansion Boards

You can daisy-chain up to eight EXP-16, EXP-16/A. and/or EXP-GP expansion boards to provide up to 128 analog input channels. You connect the first expansion board to the DAS-800 Series board by attaching one end of an S-1800 or C-1800 cable to the main I/O connector on the DAS-800 Series board and the other end of the cable to the Jl connector on the expansion board. To connect additional expansion boards, attach one end of an S-1800 or C-1800 cable to the J2 connector on the previous expansion board and the other end of the cable to the Jl connector on the next expansion board in the chain.

4-7

chap04Lfrm Black 8

Note:

Each EXP-16, EXP-16/A, or EXP-GP expansion board is associated with an analog input channel on the DAS-800 Series board. You specify the associated on-board channel by setting a jumper on the expansion board. Make sure that you use a unique jumper setting for each expansion board you are using. Refer to your expansion board documentation for more information.

You can use the J2 connector on the last expansion board in the chain to attach an STA-08 / STA-08PGA screw terminal accessory. This allows you to access the remaining functions of the DAS-800 Series board.

Figure 4-7 illustrates how to connect two EXP-16 expansion boards, one EXP-GP expansion board, and an STA-08 screw terminal accessory to a

DAS-800 board.

Jl 52

J2 Jl

4-8

EXP-16

Figure 4-7. Connecting Multiple Expansion Boards

EXP-16

EXP-GP

STA-06

Note: You can also attach up to four MB-02 backplanes to a DAS-800 Series board using an STA-SCM8 screw terminal accessory and up to four

C-2600

cables. Refer to the ME

Series User’s Guide

for more

information.

Cabling

and Wiring

chap04Lfrm Black 9

Connecting Signals

This section describes how to wire signals to a DAS-800 Series board,

Although the illustrations in this section show a direct connection to a pin on the main I/O connector, you will actually wire your signal to a screw terminal on an accessory or expansion board or to a user-supplied, female 37-pin D connector. Appendix B lists the functions associated with each

pm on the main I/O connector.

The DAS-800 board contains both digital commons and low-level analog commons. Use a digital common for all digital signal returns and power supply returns; use a low-level analog common for all analog signal returns.

The DAS-801 and DAS-802 boards contain digital commons, but no dedicated low-level analog commons. If you are using all eight analog input channels and all eight channels are configured for differential input, you must connect a bias return path to a digital common instead of a low-level analog common. If at least one channel is unused or configured for single-ended input, you can use the negative side of the channel as a low-level analog common.

When wiring analog input signals, it is recommended that you terminate

all unused input channels to low-level ground; this prevents the internal amplifier circuitry from saturating if you select an unconnected input and

ensures the accuracy of your data.

Connecting an Analog Input Signal to a Single-Ended Input

Figure 4-8 illustrates how to connect an analog input signal to

single-ended analog input channel 0 on a DAS-800 board.

4-9

chap04-.frm Black 10

Figure 4-8. Single-Ended Input

DAS-800 Board

Connecting an Analog Input Signal to a Differential Input

For differential input configurations, you must provide a bias current return path. If at least one channel is unused or configured for single-ended input, use the negative side of that channel as the low-level

analog common; otherwise, use the digital common.

Figure 4-9 illustrates how to connect an analog input signal to differential

analog input channel 0 on a DAS-801 board for output resistances both less than and greater than 100 t2 Since analog input channel 7 is not used, the bias current return path is connected to the negative side of channel 7.

4-I 0

Cabling and Wiring

chap04-.frm Black 11

250kCl

250

Figure 4-Q. Differential Input

DAS-901 Board

DAS.901 Board

Note:

For output resistances greater than 100 Q it is recommended that

the sum of the resistors used be at least 5,000 times greater than the

source output resistor.

4-11

chap04-.frm Black 12

Connecting Digital Signals

You can connect the following digital signals to a DAS-800 Series board:

Digital input signal

- Connect a digital input signal to the IPl /

TRIG, IP2, or IP3 pin (pin 25,26, or 27) on the main I/O connector.

Digital output signal

- Connect a digital output signal to the OPl,

OP2, OP3, or OP4 pin (pin 7, 8,9, or 10) on the main I/O connector.

External conversion clock

- Connect an external conversion clock to

the INT-IN / XCLK pin (pin 24) on the main I/O connector.

Hardware digital trigger or hardware gate -

Connect a hardware digital trigger or hardware gate signal to the IPl /TRIG pin (pin 25) on the main I/O connector.

External interrupt -

Connect

an external

interrupt to the INT-IN /

XCLK pin (pm 24) on the main I/O connector.

Make sure that all digital signals are TTL-level compatible. Use the

digital common as the return for all digital signals.

Caution:

To prevent damage to DAS-800 Series boards, do not apply voltages exceeding TTL maximum levels (-0.5 V to +5.5 V) to digital input pins.

Connecting Counter/Timer I/O Signals

Refer to 8254 documentation for information on connecting counter/timer I/O signals to the clock input pin, gate input pin, and output pin of any available counter/timers on a DAS-800 Series board. Table 2-2 on page 2-25 lists several companies that provide documentation for the 8254.

4-12

Cabling and Wiring

chap04Lfrm Black 13

Synchronizing Conversions on Multiple Boards

You can use a hardware external clock source to synchronize conversions on multiple DAS-800 Series boards. In addition, you canuse the the OUT1 pin (pin 5) on a DAS-801 or DAS-802 board (acting as a timing master) to synchronize conversions on additional DAS-800 Series

boards. Figure 4- 10 illustrates how you can synchronize conversions on multiple

boards, using both an external clock source and a DAS-802 board. Note that in both cases, boards 1,2, and 3 must be configured to use an external clock.

output

Internal clock -

Board 1 Board 2

Board 1

Ph 5

Figure 4-10. Synchronlzlng Conversions on Multiple Boards

Board 2

Board 3

4-13

chap04Lfrm Black 14

Figure 4- 11 illustrates the use of CflO on the 8254 on board 1 to divide

the rate of the master clock by the programmed count; this allows you to synchronize conversions on board 1 to a rate different from that of the master master clock, C/l’0 must be configured for counter/timer mode 2 (rate generator mode). Refer to page 2-21 or to your 8254 documentation for

more information.

board.

Note that when you use C/TO to divide the rate of the

Board

Pill 24

Board 0 (Master)

Pill 5

Internal clock -

Figure 4-11. Dividing the Rate of the Master Clock

OUT1

4-14

Cabling and Wiring

chap05-.frm Black 1

The Control Panel

The Control Panel is the utility that allows you to test the functions of

DAS-800 Series boards. The Control Panel is shipped in two versions.

The DOS version (CTL800.EXE) is shipped with both the DAS-800

Series standard software package and the ASO- software package; the Windows version (CTL800W.EXE) is shipped with the ASOsoftware package only.

To use the Control Panel, perform the following steps:

1. Invoke the Control Panel from DOS or Windows, as follows:

you are running under

CTLBOO.EXE utility, enter the following at the DOS prompt:

CTLSOO

Ifyou are running under Windows,

Manager File menu. Enter the following in the box and select OK:

CTLEOOW

Make sure that you enter the correct path to CTLSOOW.EXE, or use the Browse button to find tbis file.

After you invoke the Control Panel, the software displays the Open Configuration File panel, asking you to specify the configuration options you want to use.

DOS,

from the directory containing the

choose Run from the Program

5-1

chap05-.frm Black 2

2. Select the configuration options in one of the following ways:

- Select Cancel to use the default configuration options. Refer to Table 3- 1 on page 3-10 for a list of the default configuration

options. If the software does not find a board at the default base address (300H), an error message is displayed and the Control Panel terminates.

Highlight the name of a configuration file in the File Name box and select OK. The software uses the configuration options from the selected configuration tile.

Note:

You can also specify a configuration file when you invoke the Control Panel from DOS or Windows. Use the /Ffilenume option, wherefilename is the name of the configuration file you want to use.

After you specify the appropriate configuration options, the software displays the DAS-800 TEST & CONTROL panel, which is the main control panel. This panel allows you to acquire, display, and transfer analog input data and set up and display the parameters.

3. Select the appropriate buttons to perform an analog input operation. For information about the meaning of the analog input parameters,

use the Online Help provided with the Control Panel or refer to

Chapter 2.

4. To perform a digital I/O or counter/timer I/O operation, choose Digital and Counter7Timer from the Panels menu. The software displays the DIGITAL I/O & COUNTER/TIMER panel. This panel controls the output and input of digital signals and acts as an interface to the 8254 counter/timer circuitry.

5. Select the appropriate buttons to perform a digital I/O or counter/timer I/O operation. For information about the meaning of the digital I/O or counter/timer I/O parameters, use the Online Help provided with the Control Panel or refer to Chapter 2.

5-2

6. When you have finished the digital I/O or counter/timer I/O operation, select OK or Cancel to return to the DAS-800 TEST &

CONTROL panel.

The Control Panel

chap05-.frm Black 3

7. If you are running under Windows,

Exchange (DDE) to transfer

you can use Dynamic Data

data

to another Windows program by

choosing DDE from the Panels menu.

8. When you have finished using the Control Panel, choose one or more of the options from the File menu. Choose the Exit option to terminate the program.

5-3

chap05-.frm Black 4

chap06-.frm Black 1

Calibration

The analog input circuitry of DAS-800 Series boards is calibrated in the factory. It is recommended that you check the calibration every six months and recalibrate the board, if necessary.

Note:

initial calibration within an accuracy of f0.05%. In applications where a single gain (other than 1) is used for all channels, you can achieve better accuracy by calibrating the board at the selected gain.

The following sections provide the information you need to calibrate DAS-800 Series boards.

For channels using gains other than 1, the board maintains the

Equipment Rewired

You need the following equipment to calibrate a DAS-800 Series board: . A digital voltmeter accurate to 6 l/2 digits on its f10 Vdc range. . A calibrated DC voltage source with an output voltage range of

f10 V, such as the EDC 520 from Electronic Development Corporation.

Note:

variable DC voltage source and set its output voltage level using the voltmeter.

If a calibrated DC voltage source is not available, use a

6-1

chap06-.frm Black 2

. An STA-08 or STA-08PGA screw terminal accessory and C-1800

cable, or an STC-37 screw terminal connector.

Note:

equipment is of the required accuracy.

Potentiometers

DAS-800 Series boards contain potentiometers, which you must adjust when calibrating the board. The DAS-800 board contains three

potentiometers: Rl (full scale), R2 (offset), and R3 (10 V reference). The

DAS-801 and DAS-802 boards contain four potentiometers: Rl (offset), R2 (full scale), R5 (unipolar O), and R6 (high gain 0). In addition, on DAS-801 and DAS-802 boards, you must measure the voltage between two test points (TPl and TP2) when calibrating the board.

The locations of the potentiometers on the DAS-800 board are shown in Figure 6- 1; The locations of the potentiometers and test points on the DAS-801 and DAS-802 boards are shown in Figure 6-2.

Do not attempt to calibrate a DAS-800 Series board unless your

6-2

Calibration

chap06-.frm Black 3

Figure 6-1. Potentiometers @AS-600)

Full scale

oooooooooo[

Figure 6-2. Potentiometers (DAS-601 I DAS-602)

=1 q

: 0

z n

i’

6-3

chapOb.frm Black 4

Calibration Utility

To calibrate a DAS-800 Series board, you use the CAL800.EXE

calibration utility, which is shipped with both the DAS-800 Series standard software package and the ASO- software package.

You can invoke the calibration utility from DOS or Windows, as follows:

you are CAL800,EXE calibration utility, enter the following at the DOS prompt:

If you are running under Windows,

Manager File menu. Enter the following in the box and select OK:

running

CAL800

under

DOS,

from the directory containing the

choose Run from the Program

CAL800

Make sure that you enter the correct path to CALBOO.EXE, or use the Browse button to find this file.

Follow the prompts as they appear on the screen: the program guides you through the calibration process.

6-4

Calibration

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Problem Isolation

Troubleshooting

If your DAM00 Series board is not operating properly, use the information in this chapter to help you isolate the problem. If the problem appears serious enough to require technical support, refer to page 7-4 for information on how to contact an applications engineer.

If you encounter a problem with a DA.%800 Series board, perform the following steps to determine whether the problem is in the computer, in the DAS-800 Series board, or in the I/O circuitry:

1. Remove power connections to the host computer.

2. Unplug the accessory connector(s) or cable(s) from the DAS-800 Series board(s), keeping the connections intact on the accessory or expansion board(s).

3. Remove the DAS-800 Series board(s) from the computer and visually check for damage. If a board is obviously damaged, refer to page 7-4 for information on returning the board.

4. With the DAS-800 Series board(s) out of the computer, check the computer for proper operation. Power up the computer and perform any necessary diagnostics.

5. When you are sure that the computer is operating properly, remove computer power again, and install a DAS-800 Series board that you know is functional. Do not make any I/O connections.

7-I

chap07-.frm Black

6. Apply computer power and check operation with the functional DAS-800 Series board in place. This test

checks

the computer accessory slot. If you are using more than one DAS-800 Series board, check the other slots you are using.

7. If the accessory slots are functional, check the I/O hookups. Connect the accessory and expansion boards, one at a time, and check operation.

8. If operation is normal, the problem is in the DAS-800 Series board(s) originally in the computer. Try the DAS-800 Series board(s) one at a time in the computer to determine which is faulty. Use the troubleshooting information in the next section to try to isolate the problem.

9. If you cannot isolate the problem, refer to page 7-4 for instructions on getting technical support.

Troubleshooting Table

Table 7-1 lists general symptoms and possible solutions for problems with DAS-800 Series boards. If your board is not operating properly after using this information, refer to page 7-4 for in&ructio~~ 0; gening technical support.

Table 7-1. Troubleshooting Information

Symptom

i loud

does not respond Base address is unacceptable.

Possible Cause Possible Solution

Make sure that the base address

specified in the configuration file

matches the setting of the base

address switch block on the board.

Make sure that no other

system resource is using any of

the eight memory locations starting at the specified base address. Reconfigure the base address, if necessary. Refer to

page 3-13

for instructions.

7-2

Troubleshooting

chap07-.frm Black 3

Table 7-1. Troubleshooting Information (cont.)

Symptom

respond

Possible Cause

The board configuration is unacceptable.

Possible Solution

Check the settings in the configuration file. Make sure that they match the settings of the switches and jumper on the board, where appropriate.

The board is damaged.

I Contact the factorv.

The board is overheating. Check environmental and

ambient temperature.

Analog input An open connection exists. conversion data appears

to be invalid

Electrical noise exists.

Check wiring to SCTW terminal.

Use a shielded cable for low-level

applications.

7-3

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Table 7-1. Troubleshooting Information (cont.)

Symptom

System lockup

Possible Cause Possible Solution

Another system resource is using one of the eight memory locations starting at the specified base address.

Technical Support

Before returning any equipment for repair, contact the factory.

Reconfigure the base the DAS-800 Series board: refer to page 3-13 for more information. Check the I/O assignments of other system

reaonrces and reconfigure, if

address

7-4

An applications engineer will help you diagnose and resolve your problem over the telephone. Please make sore that you have the following information available before you call:

Software package

Name Serial #

Version Invoice/order #

Compiler (if applicable)

Language Manufacturer Version

Operating system

DOS version

Windows version

mode

3.0 3.1

Standard Enhanced

Troubleshooting

chap07-.frm Black 5

Computer

DAS-800 Series board

Expansion boards

Manufacturer CPU type Clock speed (MHz) Math coprocessor Amount of RAM Video system BIOS type

Model Serial # Revision code Base address setting Interrupt level setting Input configuration Input range type 8254 C/r2 usage

8088 286 8 12 20

386 486p

25 33 _

Yes No CGA Hercules EGA VGA

800 801 802

2 3 4

5 6 7 None Single-ended Differential Unipolar Bipolar

Cascaded Normal

If a telephone resolution is not possible, the applications engineer will issue you a Return Material Authorization (RMA) number and ask you to return the equipment. Include the RMA number with any documentation regarding the equipment.

7-5

chap07-.frm Black 6

When returning equipment for repair, include the following information: . Your name, address, and telephone number. . The invoice or order number and date of equipment purchase. . A description of the problem or its symptoms, . The RMA number on the outside of the package. Repackage the equipment, using the original anti-static wrapping, if

possible, and handling it with ground protection. Ship the equipment to the factory.

Note:

If you are submitting your equipment for repair under warranty,

you must include the invoice number and

date

of purchase.

7-6

Troubleshooting

appx-a-.frm Black 1

Table A-l. DA!%800, DAS-801, and DA!%802 Specifications

Feature Attribute DAS-800 DAS-801 DAM02

Specifications

Table A-l lists the specifications for the DAS-800, DAS-801, and

DAS-802 boards.

Specifications Specifications Specifications

Analog

Input

Number of channels

Input range

selection Not applicable Software

18 18

uronrammable

Software wxrammable

A-l

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Table A-l. DAS-800, DAS-801, and DAS-802 Specifications (cont.)

:eature Attribute

\nalog Input ‘Ilxoughput vs. gain’ cont.)

coefficient of rain drift

DAS-800 Specifications

Not applicable For gains 5 100:

1 maximum

DAS-801 Swciflcatlons

40 kHz

For gain of 500:

25 kHz

f50

ppm/T,

maximum

3AS-802

Specifications

10 kHz (all gains)

i-50 ppmPC, naximum

A-2

rejection at 60 Hz

For gains 2 1:

70 dB, min. 75 dB, typical

For gain of 10:

90 dB, min. 95 dB, typical

For gains 2 100:

100 dB, min. llOdB, typical

For gains S 1:

70 dB, min. 75 dB, typical

For gains > 1:

70 dB to 90 dB

Specifications

appx-a-.frm Black 3

Table A-l. DAS-800, DAS-801, and DA-S-802 Specifications (cont.)

eature

Attribute DASIOO DAS-801 DAS-802

Specifications Specifications Specifications

Successive approximation with internal samule/hold

Resolution

I Conversion time 125 us. maximum 125 us. maximum I25 us. maximum

1 12 bits 1 12 bits 1 12 bits

Successive approximation with internal sample/hold

Successive approximation with internal samtAe/bold

Maximum conversion 40 kHz frequency

Data

transfer method l/O read IJO read JJO read

(software) (software) (software)

kHz

appx-a-.frm Black 4

Table A-l. DAS-800, DAS-801, and DAS-802 Specifications (cont.)

Feature Attribute DAS-800 DAS-801 DAS-802

Specifications Soeciflcations Soecifications

Interrupts

Levels

(cont.)

Digital I/O Number of inputs

“:‘,‘.‘.:/l> ....................... j: .. (,.,.,.,.(,,, :.~.~.:.:.~.~.~.~.:.:.;:.

Input/output levels

‘“““:.:“:.:“:i’“i’:.:‘:.:“-“lip:ir:i: .~.~.:.~:.:.:.~.:.:.:.~.:.:.~.:.:.~...:.:.~::~:~:~:::::~

:.:: .... :;;.:‘::::y:

~~~~~~u~~~~~~~ ,.~~~~~~~~~~~ ~~~~p~~~~~~ ~~~~~~~~II

..... pi .,.,

...............

. ..................... ..............

....

:E:~~~~~~

Output low voltage

to I, none;

2to1,none: 2

jumper selectable jumper selectable

(Ipl /TRIG to 3 UP1 /TRIG to

IP3) IP3)

TTL compatible

. ... I .... ‘F’.><i$ ........... (.... ......

............

TTL compatible ‘ITL compatible

:P(:~l:~;;:~:id:“:.:(“~~.:.~~:.:.:.:~:.:~ :i”:.:.<:e:.:.:.:F:.::,-:i?::. :/,:,:/,:.:/:.:,:,:,:/,

............ , ..~;il * ~I .... I

~~~~~~~~:~~ ::~~~~~:~~

...............

.( ..L.. ......... . ....

0.5 V. maximum 0.5 V, maximum at 8.0 mA at 8.0 mA

to 7, none;

~iutnper selectable

3 (IPl /TRIG to

P3)

. ........... . ...........

. ..... I ., ................

>. ... . x.5, , I ,

0.5 V, maximum at

8.0

Input low voltage

Input low current

Digital Trigger Latency from trigger to

start of first conversion

A-4

IO.8 V, maximum IO.8 V, maximum

a.4

mA, max. at -0.4 mA, max. at

0.4

200 ns, max.

0.4

200

ns, max.

IO.8 V,maximum

-0.4 mA, max. at

0.4

200ns.max.

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Table A-l. DAS-800, DAS-801, and DAS-802 Specifications (cont.)

:eature Attribute

I Number of counters I 3

External clock frequency

DAS-800

Specifications Specifications SDecifications

DAS-801 DAS-802

I3 I3 I

0 to 10 MHz

IOtolOMHz IOto~iOiii~

appx-a-.frm Black 6

Table A-l. DAS-800, DAS-801, and DAS-802 Specifications (cont.)

%ature

Attribute

DAS-800 I DAS-801 I DAS-~1 Specifications Specifications Specifications

Zounter/Timer Input, clock, and gate DTL, ‘I-I-L, and cont.)

signals CMOS

compatible

7 mA, typical

9 mA, maximum

DTL, ITL, and DTL, ‘ITL, and CMOS CMOS compatible compatible

Not used Not used

Notes

’ For DAS-801 and DAS-802 boards, the accuracy reflects gain errors introduced by the PGA. You can

adjust any range to the maximum accuracy of 0.01% of full scale by calibrating the board while set

to that range. Refer to Chapter 6 for calibration information. ‘Indicates measurement settling based on the specified accuracy. 3 Includes ADC and PGA drift.

A-6

Specifications

appx-b-.frm Black 1

Connector Pin Assignments

Figure B-l shows the main I/O connector and its pin assignments on a DAS-800 board; Table B-l contains a more detailed description of the pins. Figure B-2 shows the main I/O connector and its pin assignments on a DAN301 or DAM02 board, Table B-2 contains a more detailed description of the pins.

B-1

appx-b_.frm Black 2

Top of Board (Rear Vlewl

VAEF

Pin 19

LLCOM Pill19 . :

LLCOM

Pln17 .

LLCOM Pill 16 . :

LLCOM Pill 15 .

LLCOM

LLCOM DIG COM Pin 11

OP4

Pin 14 . : Pin 13 .

Pin 12 . .

. ,

Pin10 .

OP3 Pin 9 . :

OP2

OPl

OUT2 Pill 6

OUT1 CLKI

Ph 9 . , Pill 7 .

Pin 9 Pin 4

l l

OUT0 Pill3 ’ ,

CLKO

Figure

Pin 2 ’ .

B-l. Main l/O

Ph 37 IN0 Pln 36 IN1 Pln 39 IN2 Pln 34 IN3 Pln 33 IN4 Pin 32 IN5

Ph 31 IN6

Pln30 IN7 ml29 +JV

Pin 29 DIG COM Pin 27 IP3

Pln26 IPZ

PI” 29 IPl/TRIG

. ,

Pln 24 INTJNIXCLK

Pin 23 GATE2 Pin 22 GATE1

Ph 21 GATE0 pin20 -12v

Connector

(DAS-800)

B-2

appx-b-.frm Black 3

Table S-1. Main I/O Connector Pin Assignments

for the DAS-BOO

B-3

Tektronix DAS-800 Series Users Guide

Specifications and Main Features

Frequently Asked Questions

User Manual