Keithley DAS-40 Series User manual

DAS-40
Keithley Data Acquisition Keithley MetraBytdAsyst

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User Guide
for the
DAS-40Gl & DAS-40G2
A/D & D/A Data Acquisition Boards
Copyright December 1992
KEITHLEY DATA ACQUISITION - Kelthley MetraBytelAsyst
440 MYLES STANDISH BLVD.. Taunton. MA 02780
TEL. [phone]. FAX [phone]
11,

Warranty lnformatlon
AH products mnnufacturrd by Kcithlcy Data Acquisition ac warranted ngse~t
dcfcctivc malcrlals and workmanship lor a period of one year from the date of
delivcly to the orlglnnl purchnwr. Any pmduct that Is found to be defoctlvc within
the wiu-mnty pcrlod till. at the option al Keithley Data Acquisition, bc
rcpalrcd or rcplaccd. ‘IhIs warranty dots not apply to products damagud by
improper use.
Warning
Keithley Data Acquisition ~ssumcs no liability for damages coneequcnt
to the “SC of this product. Tb‘s product I. not desI@,ned4th components
of Plevel of reliability suitable for use in life support or critlca,
epplicetions.
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Contents
CHAPTER 1 INTRODUCTION
1.1 General
1.2 Distribution Software
1.3 The STA-40 Accessory
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CHAPTER 2 INSTALLATION
2.1
2.2
2.3
2.4
2.5
2.6
General . . . .
Backing Up Distribution Software
Single-Floppy-Drive Machines
Dual-Floppy-Drive Machines
Hard-Drive Machines . . . . .
Unpacking & Inspecting .
Configuration Options. . . .
Base Address . .
DMA Channel
Interrupt Level .
A/D Functions
D/A Functions
Hardware installation . . . .
Single-Ended vs. Differential Connections
Installing The DAS-40 In A PC
DAS-40 & STA-40 I/O Connections
CHAPTER 3 PROGRAMMING NOTES
3.1 General
3.2 The Language Interlace Modules .
Interface For BASIC(A) - DAS4OBIN
Interlace For QuickBASIC - DAS40.LIB. DAS40.OLB.
3.3 Loading/Unloading The DAS-40 Softv!are Driver
3.4 Changing The Factory Configuration
3.5 The Call Modes
3.6 Default Configuration . . . .
3.7 Accommodating Multiple DAS-40s In A Single System
CHAPTER 4 CALL MODES
4.1 MODE 0: Query Configuration For An Installed DAS-40
4.2 MODE 1: Specify Buffer(s) & Conversion Count(s) For ADC & DAC
4.3 MODE 2: Setup For A/D or D/A Conversions For Transfer Via DMA
4.4 MODE 3: Setup A/D Start/Stop Channels & Global Gain Value
4.5 MODE 4: Start A/D Conversions & Transfer Via DMA
4.6 MODE 5: Stan D/A Conversions & Transfer Via DMA
4.7 MODE 6: Setup A/D & D/A Conversion Pacing Clock
4.6 MODE 7: Do One A/D Conversion,
4.9 MODE 8: Do One D/A Conversion,
4.10 MODE 9: Monitor DMA Transfers For ADCs & DACs.
4.11 MODE 10: Setup For Digital I10
4.12 MODE 11: Input Byte/Word . .
4.13 MODE 12: Set/Query Current DAS-40 Card Number,
4.14 MODE 13: Terminate Current DMA Operation
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4.15
4.16
4.17
4.18
4.19
4.20
MODE 14: Output Byte/Word . . . . . .
MODE 15: Tag Channel Numbers To A/D Data Sample. .
MODE 16: A/D Triggered Block Scan MODE (DMA)
MODE 17: Transfer Data To BASIC Array . . . .
MODE 18: Allocate Memory Buffer for DMA Operations.
MODE 19: Free Memory Buffer. . .
CHAPTER 5 REGISTER STRUCTURE & FORMAT
5.1 General.
5.2 A/D Control-Status Register (ADCSR) .
5.3 Channel-Gain List Control-Status Register (CHANCSR)
5.4 A/D Data Register (ADDAT). . . . . . . . .
5.5 D/A Control-Status Register (DACSR)
5.6 D/A Data Register (DADAT). . . .
5.7 DIO Data Register (DIODAT) . .
5.8 Supervisory Control-Status Register (SUPCSR)
5.9 Pacer Clock Register (TMRCTR)
CHAPTER 6 CALIBRATION
CHAPTER 7 SPECIFICATIONS
7.1 A/D Subsystem
7.2 D/ASubsystem . .
7.3 Digital l/O Subsystem
7.4 External Trigger
7.5 Clock
7.6 Interface Characteristics
7.7 Power Requirements
7.8 Physical/Environmental
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CHAPTER 8 FACTORY RETURNS
APPENDICES
Appendix A Coding Tables
Appendix B Direct Memory Access (DMA)
Appendix C Summary Of Error Codes
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CHAPTER 1
INTRODUCTION
1.l GENERAL
The DAS40Gl and DAS4OG2 arc high-speed, 12-bit, A/D and D/A data-acquisition boards that plug
into an accessory slot of an IBM PC-AT or compatibles. The two boards differ only in A/D gains and
throughputs. The Gl version offers gains of 1, 10,103,and 500at up to 100,CCUsamples per scrond;
the G2 version offers gains of 1,2,4, and 8 with a throughput of 250,Mx)samples per second, see
specifications on Page7-2. Analog input configuration is switch-selectable, and the board is
configurable for either eight differential input channels or 16singlecndcd channels.
D/A subsections include two 12-bit, deglitched D/A converters able to provide cithcr single outputs
(the analog outputs change at different times) or simultaneous outputs (the D/A convcrtcr outputs
change at the same time). In a DMA (Direct Memory Access)transfer, digital data converts to analog
at 130KHz. The boards also feature two &?-linedigital I/O ports, which can bc set for input or output.
DAS40 models contain a programmable l’accr Clock for controlling A/D and D/A conversion rates.
Operating under program control, the PacerClock provides a usable range of 4.0~ (250KH.z) to 2s
(0.5Hz). External clocking may also be sclectcd for starting conversions, while an cxtcrnal trigger may
be selected for gating the conversions (A/D and D/A). The A/D and D/A converters can opcratc
simultaneously at the sameclock speed, or the D/A subsystem can opcratc in single-conversion mode
while the A/D subsystem operates from the pacer clock or from an extcrnnl clock.
The DMA interface accommodates 16.bit data transfers and is switch-sclcctablc for DMA Chnnncl5,6,
or 7. DMA buffers can rcsidc anywhere in the DOS640KB memory spaceof an PC/AT and may h
up to 65,536words (128KB) each.
The boards are also configurable for using two DMA channels to support Continuous Performance
DMA. Continuous Performance DMA is a sampling method for providing gap-free transfers of large
volumes of data from memory or disk (D/A conversions) or to memory or disk (A/D conversions)
with no sample losses.
Interrupt Level support is jumper-selectable for Level 3,5,7,10, or 15. Analog-input voltage
protection extends to f25V with power On or Off.
Board calibration is pcrformcd at the factory. While calibration of the A/D subsystem changes very
little with a switch to a new range, the D/A subsystem may need recalibration for any range
switching.
1.2 DISTRIBUTION SOFTWARE
The software package furnished with your board includes an installable software driver, BASIC and
QuickBASIC Language Intcrfacc modules, example programs, and various utilities. Refer to the text
file FILES.DOC on your Distribution Software diskette for a complctc listing of the files contnincd
thereon.
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DAS-40 USER GUIDE
1.3 THE STA-40 ACCESSORY
The STA-40 is a Screw Terminal Accessory Box useful for connecting to the DAS-40. All I/O
connections use screw terminals that are accessible through the side of the STA-40. Analog inputs
connect to Terminals TBl and TB2. Analog outputs, along with the external trigger and external clock,
connect to TB5. Digital port lines connect to TB3 and TB4. Five “user” lines and a +5V input line are
also available.
Two 50.pin connectors and a 26pin connector provide additional I/O interface Either 50.pin
connector acceptsa cable from the DAS-40 while the other acceptsone or several daisy-chained STA-
40s. The 2kpin connector is available for use with the “5802 Rack” of signal-conditioning modules.
When connecting an analog input to the STA-40 for adifferential mcasurcmcnt, connect the input
signal line to a HI (High) terminal of Connector TBl or TB2 (HI0 through HI7 ) and the input
ground to corresponding L (Low) terminal f LO8 through L15 ). For cxamplc, a diffcrcntial
connection for Channel 0 would use HI0 and MB, while a differential connection for Channel 1
would USC HI1 and Log. Rcfcrcncc the ground of the DAS-40 to the system ground of the
mcasuremcnt source by connecting the AGND terminal either directly or via resistor to the system
ground.
When connecting an analog input to the STA40 for a singlccndcd mcasuremcnt, connect the input
signal lint to a HI (High) or L (Low) terminal (HI0 through H17 or LO8 through LJ5 ). For single-
ondcd mcasurcmcnts, the HI and L prefixes on TBl and TB2 have no significance. Connect the
analog input return to the terminal labelled ALO, which should be tied to the ground rcfcrcncc of
your system. If you want the ground rcfercncc to be at the STA40, connect the 2-way jumper of the
STA-40 ( WI ) to the LOCAL pin. If you want to rcferencc the analog inputs to a point in your
system, connect the W1 jumper to the REMOTE pin. For single-cndcd mcasurcmcnts, connect the
AGND terminal to your system ground, either directly or through a resistor to limit any common-
mode voltage bctwcen AL0 and AGND As aguard against a situation whew one might forget to
reference the system ground to DAS-40 ground, the DAS40 lOK-Ohm Resistor R30(Figure 2-l)
connects AL0 to AGND You may remove this resistor if you use the REMOTE mcasurcmcnt
scheme.
Note that when you selecting Single-Ended or Diffcrcntial mcasurcments, rcmcmbcr to wt the DASJI)
sclcction switch.
The STA-40 also contains an area for brcadboarding an application circuit. The following patches are
available in that area:
PATCH DESCRII’TION
AGND
+15v
-15v
PGND
DGND
+5v
USERA
USERB
USERC
USERD
USERE
Analog input groundreturn
+15V fmtn theDAS-40 DC/DC Convcrtcr
-15V from theDAS-40 DC/DC Converter
Groundreturn for Al5V lines
Digital ground return
User-suppliedinput
User-suppliedinput
User-suppliedinput
User-suppliedinput
User-suppliedinput
User-suppliedinput
NOTE: Limit the ?r15Voutput current to under 20mA.
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CHAPTER 2
SETUP & INSTALLATION
2.1 GENERAL
This chapter provides instructions for the installing the DAS-40 in an IBM PC-AT or compatible. The
chapter begins with procedures for making working topics of your DA’S40 Distribution Softwarc.
Next arc instructions for unpacking and inspection, followed by descriptions of the options and
methods for setting all configurable parameters.
2.2 BACKING UP DISTRIBUTION SOFTWARE
Distribution software is furnished on 5.25”,360K floppy diskette(s). To accommodate users with 3.5”
floppy drive, the Software is also available on 720K diskette(s).
As soon as possible, make a working copy of your DAS-40 software using the procedures that follow.
Store your original software copy in a safeplace asa backup.
The following back-up procedures cover the more common computer configurations: a single-floppy
drive (with hard disk), dual-floppy drives, and a hard drive.
Single-Floppy-Drive Machines
To copy your Distribution Software to your computer’s hard disk, rcfcr to the subsection below
entitled Hard-DriveMachines To copy to another diskette in a single-floppy-drive machine (with
hard disk),
1. Turn on power to your computer and display.
2. After system boot-up, the DOS prompt should bc C >
3. Besure the DOS file DISKCOPY.EXE is in the C:\ directory. Then, type DISKCOPY A: A:
4. Insert the source diskette (your DAS-40 Distribution Software diskette) into Drive A. The system
will prompt you through the disk copying process. When the source diskette has been copied into
memory, the System will ask you to insert the tar@ diskette into Drive A. The tarpet diskette is
a formatted, blank disk that is to be your back-up disk.
5. When a copy is complete, the computer will ask COPY ANOTHER (Y/N)?. Respond by typing
Y for another diskette or N if you are finished copying. If you typed Y, repeat Steps3 and 4.
6. Put the original DAS-40 diskcttc(s) in a safeplace. Label the back-up diskcttccs) DA.540 Wurkiq
Disk and USCfor running your DAS-40 programs.
Dual-Floppy-Drive Machines
To copy your Distribution Software to thecomputer’s hard disk, refer to the next subsection, Ilard-
Drive Machines To copy to another diskcttc(s) in a dual-floppy-drive machine,
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DAS-40 USER GUIDE
1. Turn on power to your computer and display, and place your DOSdiskette in Drive A.
2. The DOS prompt should be A > If not, type A: followed by < Enter > Bc sure the diskcttc in
Drive A contains the DISKCOPY.EXE file.
3. Thcn,type DISKCOPY A: B:
4. Insert the sauce diskette (your DA’S40 diskette) into Drive A. The system will prompt you
through the disk copying process. It will ask you to insert the target diskcttc into Drive B. The
target diskette is a blank disk that is to be your back-up disk.
5. When a copy is complete, the computer will ask COPY ANOTHER (Y/N)?. Respond by typing
Y for another diskette or N if you are finished copying. If you typed Y, rcpcat Steps3 and 4.
6. When copying is complete, put the original DA!+40 diskette(s) in a safeplace. Label the back-up
diskette(s) DAS-40 Working Disk. Use this disk to run the software.
Hard-Drive Machines
To copy your DAS-40 files to a hard disk:
1. Start your computer. You should seea prompt, which indicates you arc at the DOS lcvcl (for
example, if your hard drive is dcsignatcd as C, you should seethe prompt C > ).
2. The following instructions create a special directory for the DAS-40 Distribution Software files.
At the DOS prompt, type: mkdir D40 followed by < Enter > . Change to the DAS-40 directory
by typing: CD D40 followed by < Enter >
3. Place the Distribution diskette into Floppy Drive A and type A: When the prompt chnngcs from
C> to A>,type copy *.* c: followed by < Enter >.
4. When a copy is complctc, the computer will ask COPY ANOTHER (Y/N)?. Respond by typing
Y for another diskette or N if you are finished copying. If you typed Y , rcpcat Steps3 and 4.
5. You have now copied the contents of the Distribution Software diskcttc to your hard disk. Store
the original diskcttc in a safeplace.
2.3 UNPACKING AND INSPECTING
After you remove the wrapped board from its outer shipping carton, proceed as follows:
1. Placeone hand firmly on a metal portion of the computer chassis (the computer must bc turned
Off and grounded). You place your hand on the chassis to drain off static electricity from thr
package and your body, thereby preventing damage to board components.
2. Allow a moment for static electricity discharge; carefully unwrap the board from its anti-static
wrapping material.
3. Inspect the board for signs of damage. If any damage is apparent, return the board to the factory.
4. Check the contents of your package against its packing list to bc sure the order is complctc.
Report any missing items to the manufactorcr immediately.
You may find it advisable to retain the packing material in cast the board must bc rcturncd to the
factory.
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