Keithley DDA-06 User manual

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DDA-06
USER’S GUIDE
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DDA-06 User’s Guide
Revision B - July 1994
Part Number: 61860
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New Contact Information
Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, OH 44139
Technical Support: 1-888-KEITHLEY
Monday – Friday 8:00 a.m. to 5:00 p.m (EST)
Fax: [phone]
Visit our website at http://www.keithley.com
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Keithley MetraByte Division
Keithley Instruments, Inc.
440 Myles Standish Blvd. Taunton, MA 02780
Telephone: [phone] ●FAX: [phone]
The information contained in this manual is believed to be accurate and reliable. However, Keithley
Instruments, Inc., assumes no responsibility for its use or for any infringements of 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 Keithley Instruments, Inc.
KEITHLEY INSTRUMENTS, INC., 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
SUITABLE FOR USE IN LIFE SUPPORT OR CRITICAL APPLICATIONS.
Refer to your Keithley Instruments license agreement and Conditions of Sale document for specific
warranty and liability information.
MetraByte is a trademark of Keithley Instruments, Inc. VIEWDAC, EASYEST LX, EASYEST AG, and
ASYST are registered trademarks of Keithley Instruments, Inc.All other brand and product names are
trademarks or registered trademarks of their respective companies.
© Copyright Keithley Instruments, Inc., 1985, 1994.
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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vii
Preface
The DDA-06 User’s Guide is intended to help you understand the
installation, interface requirements, functions, and operation of the
DDA-06 board. This guide focuses primarily on describing the board and
its capabilities, setting up the board and its associated software, making
typical hookups, and operating the Control Panel software. There are also
chapters on calibration and troubleshooting. To follow the information
and instructions contained in this manual, you must be familiar with the
operation of an IBM®PC/XT™, PC AT®, or compatible computer in the
MS-DOS®and Windows™environments. You must also be familiar with
data-acquisition principles and applications.
The DDA-06 User’s Guide is organized as follows:
●Chapter 1 describes features, accessories, and software options of the
board.
●Chapter 2 summarizes operating features of the board. This chapter
contains a block diagram and brief descriptions of the features as they
relate to your options for setting up and using the boards.
●Chapter 3 contains instructions for inspection, software installation,
configuration, and board installation.
●Chapter 4 shows the preferred methods of making I/O (Input/Output)
connections, using the available accessories and cables.
●Chapter 5 provides starting instructions and a brief description of the
Control Panel program.
●Chapter 6 provides an I/O address map, some programming
information, and some programming examples.
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viii
●Chapter 7 discusses calibration requirements and gives instructions
for starting the calibration program.
●Chapter 8 contains information on isolating and determining the
source of operating problems. This chapter also contains instructions
for obtaining technical support.
●Appendix A contains specifications for the DDA-06 board.
●Appendix B contains pin assignments for the main I/O connector of
DDA-06 board.
●An index completes the manual.
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Table of Contents
iii
Preface
1Overview
Features and Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Supporting Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
2Functional Description
Digital I/O Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Analog Output Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
3Setup and Installation
Unpacking and Inspecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Installing the Software Package. . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Configuring the Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Setting the Base Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Setting the Output Range . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
Setting the Data Transfer Mode . . . . . . . . . . . . . . . . . . . . . . .3-5
Setting the Output Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
Installing the Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
4Cabling and Wiring
Attaching an STA-U, SSIO-24, or ERB-24 . . . . . . . . . . . . . . . . .4-2
Attaching an STC-37 Accessory . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Typical Output Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
5The Control Panel
6Programming
I/O Address Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Programming Examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
Example 1: Write to Any DAC . . . . . . . . . . . . . . . . . . . . . . . .6-3
Example 2: Read/Write the Digital I/O Ports . . . . . . . . . . . . .6-4
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iv
7Calibration
Equipment Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Switch, Jumper, and Potentiometer Locations. . . . . . . . . . . . . . .7-2
8Troubleshooting
Problem Isolation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Identifying Symptoms and Possible Causes . . . . . . . . . . . . . .8-1
Testing the Board and Host Computer . . . . . . . . . . . . . . . . . .8-4
Testing the Accessory Slot and I/O Connections . . . . . . . . . .8-4
Technical Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-5
ASpecifications
BConnector Pin Assignments
Index
List of Figures
Figure 2-1. Block Diagram of DDA-06 . . . . . . . . . . . . . . . . . .2-1
Figure 3-1. Switch and Jumper Locations . . . . . . . . . . . . . . . .3-3
Figure 4-1. Pin Assignments for the Main I/O Connector . . . .4-1
Figure 4-2. Attaching an STA-U, SSIO-24, or ERB-24. . . . . .4-2
Figure 4-3. Attaching an STC-37 Accessory . . . . . . . . . . . . . .4-2
Figure 4-4. Voltage Output. . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Figure 4-5. 4 to 20 mA Current Output (Floating Load) . . . . .4-3
Figure 4-6. 4 to 20 mA Current Output (Grounded Load). . . .4-4
Figure 7-1. Switch, Jumper, and Potentiometer Locations. . . .7-2
Figure B-1. Main I/O Connector Pin Assignments. . . . . . . . . B-1
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v
List ofTables
Table 3-1. Values of Base Address Switch Positions . . . . . . .3-3
Table 3-2. Standard Address Assignments . . . . . . . . . . . . . . .3-4
Table 3-3. Range Switch Settings . . . . . . . . . . . . . . . . . . . . . .3-5
Table 6-1. DDA-06 Register I/O Address Map . . . . . . . . . . .6-1
Table 6-2. DAC Data Format . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Table 6-3. Control Code Requirements for
Port I/O Settings . . . . . . . . . . . . . . . . . . . . . . .6-4
Table 8-1. Troubleshooting Information. . . . . . . . . . . . . . . . .8-2
Table A-1. Digital I/O Specifications . . . . . . . . . . . . . . . . . . A-1
Table A-2. DAC Specifications . . . . . . . . . . . . . . . . . . . . . . . A-2
Table A-3. Environmental Specifications . . . . . . . . . . . . . . . A-3
Table A-4. Power Specifications . . . . . . . . . . . . . . . . . . . . . . A-3
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1-1
1
Overview
The DDA-06 is a digital I/O and analog output board for an accessory slot
of an IBM PC/XT, PC AT, or compatible computer. This chapter lists
features and applications of the board and describes supporting software
and accessories.
Features and Applications
Features of the DDA-06 are as follows:
●24 bits of parallel, digital I/O
●Six channels of 12-bit analog output
●+5, +10, ±2.5, ±5, and ±10 V analog output ranges
●4 to 20 mA current-loop (sink) capability at the analog output
●Switch selectable, simultaneous updating on all channels
Typical applications for the DDA-06 are as follows:
●Servo control
●Programmable voltage source
●Programmable current sink
●Function generator
●Product test
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1-2 Overview
Supporting Software
The software package for the DDA-06 is provided on 3.5-inch or
5.25-inch diskettes. This package includes example programs in
Microsoft®QuickBasic™4.5, Microsoft Professional BASIC, C, Pascal,
and Microsoft Visual Basic™for Windows. The package also includes
support files and the following utility programs:
●General Utility - This utility (UTIL06.EXE) is a program for
installing, calibrating, and testing the DDA-06.
●Control Panel - The Control Panel is a stand-alone program
(CTL06W.EXE) supplied for Windows. This program provides
access to all DDA-06 board operations without programming.
Control Panel operations include acquiring analog inputs, controlling
analog outputs, and controlling digital I/O. The Control Panel is a
means of testing the board and your application; it is also a means of
performing simple applications. Refer to Chapter 5 for more
information about the Control Panel.
●PORTIO.DLL - A Dynamic Link Library providing I/O functions to
users of Visual Basic for Windows. The purpose and use of this file
are discussed in the accompanying file, PORTIO.TXT.
●Data acquisition and analysis application software- VIEWDAC®,
EASYEST LX™, and EASYEST AG™are integrated software
packages available for the DDA-06 boards. Programming tools, such
as ASYST®scientific and engineering programming language, are
also available to help you in writing your application programs. You
must use external driver part number DVRDA06 with these software
packages. Refer to the Keithley MetraByte product catalog for more
information.
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1-3
Accessories
The following accessories are available for use with the DDA-06:
Note: The main I/O connector of the DDA-06 contains no power supply
connections. Therefore you must connect all accessories requiring power
to an external source.
●STA-U - Screw terminal accessory that enables all signals of the
DDA-06 to be accessible through screw-terminal connections. Use a
C-1800 cable to connect this accessory to the DDA-06.
●C-1800 - An 18-inch ribbon cable terminated at each end with a
37-pin female type D connector.
●STC-37 - Screw terminal connector panel. This accessory connects
directly the the main I/O connector of a DDA-06 board to provide
general-purpose, screw-terminal connections in a compact form
factor.
●ERB-24 - Electrical relay board. This accessory provides 24
electromechanical double-pole, double-throw relays for controlling
and switching up to 3 A at 120 Vrms. The ERB-24 connects to the
main I/O connector of the DDA-06 through a C-1800 cable.
●SSIO-24 - 24-channel mounting panel for up to 24 solid-state,
miniature I/O modules with functions of DC input, DC output, AC
input, and AC output. The SSIO-24 connects to the main I/O
connector of the DDA-06 through a C-1800 cable.
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2-1
2
Functional Description
This chapter describes the features of the digital I/O and analog output
sections of the DDA-06 board. These descriptions are provided to
familiarize you with the operating options and to enable you to make the
best use of your board. Figure 2-1 shows a block diagram of the DDA-06
board.
Figure 2-1. Block Diagram of DDA-06
DAC
0
Out 0
Latch
12
DAC
5
Out 5
12
DAC
4
Out 4
Latch
12
DAC
3
Out 3
Latch
12
DAC
1
Out 1
Latch
12
DAC
2
Out 2
Latch
12
Digital I/O (8255 P.P.I.
PC PAPB
24 Digital I/O Lines
Data
Buffers
Address
Decode
Latch
V I V IV I V I V I V I
V = 0 to 10 V, 0 to 5 V,
±2.5 V, ±5 V, ±10 V
I = 4 to 20 mA current
loop (sink)
BaseAddress
Select
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2-2 Functional Description
Digital I/O Features
The 24 bits of digital I/O delivered to the main I/O connector are
configured as three 8-bit ports. Each of these ports can be independently
programmed as an input or an output and is TTL/CMOS compatible.
The DDA-06 uses an 8255 P.P.I. (programmable peripheral interface)
chip for digital I/O; this chip can operate in any of the 8255 modes
(modes 0 to 2), which are straight I/O, strobed I/O, and bidirectional I/O.
Analog Output Features
The DDA-06 board contains six, independent, 12-bit DACs
(digital-to-analog converters) that are individually switch-selectable for
any of the following ranges:
●0 to 10 V
●0 to 5 V
●±2.5 V
●±5 V
●±10 V
●4 to 20 mA current loop (sink)
Each DAC has a double-buffered input for single-step update, and each
occupies its own I/O location.
You can set a jumper block at each DAC for individual or simultaneous
update.
Each DAC output has its own pin on the main I/O connector.You can
jumper the output of each DAC to deliver either voltage (V) or current (I)
to this pin. In voltage mode, output settling time is typically 3 µs to 0.01%
for a full-scale step.
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3-1
3
Setup and Installation
This chapter contains instructions for installing the DDA-06 board. The
installation task includes three basic steps: unpacking and inspecting the
board, setting the configuration switches and jumpers, and installing the
board in the computer. These steps are described in the sections that
follow.
Unpacking and Inspecting
Caution: A discharge of static electricity from your hands can seriously
damage certain electrical components on any circuit board. Before
handling any board, discharge static electricity from yourself by touching
a grounded conductor such as your computer chassis (your computer
must be turned off) or by wearing an anti-static strap. Whenever you
handle a board, hold it by the edges and avoid touching any board
components.
Use the following procedure to unwrap and inspect a DDA-06 board.
1. Factory packaging of the DDA-06 board includes a final wrap of
protective, anti-static material. Remove the board from its anti-static
wrapping material.You may wish to store the wrapping material for
possible future use.
2. Inspect the board for signs of damage. If damage is apparent, arrange
to return the board to the factory (see “Technical Support” on page
8-5).
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3-2 Setup and Installation
3. Check the remaining contents of your package against the packing
list to be sure your order is complete. Report any missing items,
immediately.
4. When you are satisfied with the inspection, proceed with the software
and hardware setup instructions.
Installing the Software Package
Before you work with the DDA-06 software, copy the software package
diskette either to your computer hard drive or to another diskette. To copy
the software to your computer hard drive, make a new directory to contain
the software, such as DDA06. Store the original diskette as a backup.
After you copy the software package, read the text file FILES.TXT to
familiarize yourself with the contents of the package. Note that the DOS
program UTIL06.EXE is available to facilitate the installation,
calibration, and test of your DDA-06. Note also that the Windows
program CTL06W.EXE, the Control Panel, is available for the operation
of your DDA-06.
If you plan to use the PORTIO.DLL to write applications in Visual Basic
for Windows for operation of your DDA-06, read the text file
PORTIO.TXT for information and for prototypes of I/O functions.
Configuring the Board
The base address and the selection of range, data transfer mode, and
output mode are all specified through switch or jumper settings. Although
the factory settings may be suitable for some installations, check each of
these settings against the needs of your application and make any
necessary changes. The locations of these switches and jumpers are
shown in Figure 3-1.
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3-3
Figure 3-1. Switch and Jumper Locations
Setting the Base Address
The base address switch is preset at the factory for 300h (see Figure 3-1).
Table 3-1 lists the values for each position of the base address switch.
Table 3-1. Values of Base Address Switch Positions
Switch
Position Address Line
Value When Switch Is OFF
Decimal Hexadecimal
1 A9 512 200
2 A8 256 100
3 A7 128 80
4 A6 64 40
5 A5 32 20
6 A4 16 10
1 2 3 4 5 6
O
N
Base Address
Switch
DAC 0 DAC 1 DAC 2 DAC 3 DAC 4 DAC 5
Range
Switch
N
X
V
I
Data
Transfer
Jumper
Output Mode
Jumper
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3-4 Setup and Installation
If the default address is already assigned to some other device in your
computer, specify a different address. The address you specify must be
within the range of 200 to 3F0h (512 to 1008 decimal) and on a 16-byte
boundary. When selecting a base address, do not select an address that
conflicts with those already in use. Table 3-2 lists standard address
assignments and their corresponding devices.
Table 3-2. Standard Address Assignments
Address
(Hexadecimal) Device Address (Hexadecimal) Device
000 - 0FF Internal I/O 378 - 37F Printer
100 - 1FF Undecoded 380 - 389 Binary comm. 2
200 - 20F Joy stick Port 380 - 38C SDLC comm.
210 - 217 Expansion unit 390 - 39F Available
218 - 21F Available 3A0 - 3A9 Binary comm.
220 - 24F Reserved 3AA - 3AF Available
250 - 277 Available 3B0 - 3BF Mono disp./printer
278 - 27F Reserved 3C0 - 3CF Reserved
280 - 2EF Available 3D0 - 3DF Color/graphics
2F0 - 2F7 Reserved 3E0 - 3E7 Reserved
2F8 - 2FF Com2: 3E8 - 3EF Available
300 - 31F Available 3F0 - 3F7 Floppy disk
320 - 32F Fixed disk 3F8 - 3FF Com1:
330 - 377 Available — —
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3-5
Setting the Output Range
The output range switch for each DAC is a 3-position DIP switch located
below the DACs, as shown in Figure 3-1 on page 3-3. The settings of each
position for each available range are as shown in Table 3-3.
Setting the DataTransfer Mode
The data transfer mode jumper for each DAC is a 2-position jumper
located between the output range switches and the DACs, as shown in
Figure 3-1 on page 3-3. When the data transfer mode jumper is at position
N (normal), the adjacent DAC updates after writing the high byte. When
the data transfer mode jumper for a channel is at position X (transfer), the
DAC for that channel updates simultaneously with all other DACs
jumpered at position X on a read of any I/O address in the range of Base
Address +0h to Base Address +Bh.
Setting the Output Mode
The output mode jumper for each DAC is a 2-position jumper located
above the DACs, as shown in Figure 3-1 on page 3-3. When the output
mode jumper for a channel is at position V (voltage), the output of that
channel is voltage. When the output mode jumper for a channel is at
position I (current), the output of that channel is 4 to 20 mA.
Table 3-3. Range Switch Settings
Output
Range Position 1 Position 2 Position 3
0 to 5 V Left Right Left
0 to 10 V Left Left Left
±2.5 V Left Right Right
±5 V Left Left Right
±10 V Right Left Right
4 to 20 mA Left Right Left
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