NI-DAQ™ Function
Reference Manual
for PC Compatibles
Version 6.1
Data Acquisition Software for the PC
NI-DAQ FRM for PC Compatibles
April 1998 Edition
Part Number 321645C-01
© Copyright 1991, 1998 National Instruments Corporation. All rights reserved.
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About This Manual
How to Use the NI-DAQ Manual Set..............................................................................xiii
Organization of This Manual................................................ ...... .....................................xiii
Conventions Used in This Manual...................................................................................xiv
MIO and AI Device Terminology.....................................................................xvii
About the National Instruments Documentation Set.......................................................xix
Related Documentation....................................................................................................xx
Customer Communication............................................................................................ ...xx
Chapter 1
Using the NI-DAQ Functions
Status Codes, Device Numbers, and SCXI Chassis IDs..................................................1-1
Variable Data Types ........................................................................................................1-2
Primary Types ...................................................................................................1-2
Arrays................................................................................................................1-3
Multiple Types............................ ...... ..... ............................................................1-3
Programming Language Considerations..........................................................................1-4
Borland Delphi..................................................................................................1-4
Visual Basic for Windows.................................................................................1-4
NI-DAQ Constants Include File .........................................................1-5
NI-DAQ for LabWindows/CVI.......................................................................................1-5
Contents
Chapter 2
Function Reference
AI_Change_Parameter..................................................................................................... 2-1
AI_Check.........................................................................................................................2-3
AI_Clear...........................................................................................................................2-5
AI_Configure...................................................................................................................2-6
AI_Mux_Config...............................................................................................................2-10
AI_Read...........................................................................................................................2-12
AI_Read_Scan ................................................................................................................. 2-14
AI_Setup..........................................................................................................................2-15
AI_VRead........................................................................................................................2-17
AI_VRead_Scan ..............................................................................................................2-19
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Contents
AI_VScale .......................................................................................................................2-20
Align_DMA_Buffer........................................................................................................2-22
AO_Calibrate...................................................................................................................2-25
AO_Change_Parameter ...................................................................................................2-27
AO_Configure.................................................................................................................2-38
AO_Update......................................................................................................................2-42
AO_VScale......................................................................................................................2-43
AO_VWrite .....................................................................................................................2-45
AO_Write........................................................................................................................2-47
Calibrate_1200 ................................................................................................................2-49
Calibrate_DSA ................................................................................................................2-55
Calibrate_E_Series..........................................................................................................2-58
Config_Alarm_Deadband................................................................................................2-63
Config_ATrig_Event_Message.......................................................................................2-67
Config_DAQ_Event_Message........................................................................................2-71
Configure_HW_Analog_Trigger....................................................................................2-83
CTR_Config....................................................................................................................2-90
CTR_EvCount.................................................................................................................2-92
CTR_EvRead...................................................................................................................2-94
CTR_FOUT_Config........................................................................................................2-96
CTR_Period.....................................................................................................................2-98
CTR_Pulse.......................................................................................................................2-100
CTR_Rate........................................................................................................................2-104
CTR_Reset ...................................................................................................................... 2-106
CTR_Restart....................................................................................................................2-107
CTR_Simul_Op...............................................................................................................2-108
CTR_Square....................................................................................................................2-110
CTR_State .......................................................................................................................2-113
CTR_Stop........................................................................................................................2-114
DAQ_Check....................................................................................................................2-115
DAQ_Clear......................................................................................................................2-117
DAQ_Config ...................................................................................................................2-118
DAQ_DB_Config............................................................................................................2-121
DAQ_DB_HalfReady......................................................................................................2-122
DAQ_DB_Transfer .........................................................................................................2-124
DAQ_Monitor .................................................................................................................2-126
DAQ_Op..........................................................................................................................2-129
DAQ_Rate.......................................................................................................................2-132
DAQ_Set_Clock..............................................................................................................2-134
DAQ_Start.......................................................................................................................2-136
DAQ_StopTrigger_Config..............................................................................................2-140
DAQ_to_Disk..................................................................................................................2-142
DAQ_VScale...................................................................................................................2-145
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Contents
DIG_Block_Check........................................................................................................... 2-147
DIG_Block_Clear............................................................................................................2-148
DIG_Block_In .................................................................................................................2-149
DIG_Block_Out...............................................................................................................2-152
DIG_Block_PG_Config...................................................................................................2-154
DIG_DB_Config..............................................................................................................2-158
DIG_DB_HalfReady ....................................................................................................... 2-160
DIG_DB_Transfer...........................................................................................................2-162
DIG_Grp_Config.............................................................................................................2-164
DIG_Grp_Mode...............................................................................................................2-166
DIG_Grp_Status ..............................................................................................................2-169
DIG_In_Grp .....................................................................................................................2-171
DIG_In_Line....................................................................................................................2-173
DIG_In_Port .................................................................................................................... 2-175
DIG_Line_Config............................................................................................................ 2-177
DIG_Out_Grp..................................................................................................................2-178
DIG_Out_Line.................................................................................................................2-179
DIG_Out_Port..................................................................................................................2-181
DIG_Prt_Config...............................................................................................................2-183
DIG_Prt_Status................................................................................................................ 2-186
DIG_SCAN_Setup...........................................................................................................2-188
DIG_Trigger_Config.......................................................................................................2-192
Get_DAQ_Device_Info...................................................................................................2-195
Get_NI_DAQ_Version....................................................................................................2-197
GPCTR_Change_Parameter............................................................................................ 2-198
GPCTR_Config_Buffer...................................................................................................2-209
GPCTR_Control ..............................................................................................................2-211
GPCTR_Read_Buffer......................................................................................................2-213
GPCTR_Set_Application.................................................................................................2-215
GPCTR_Watch................................................................................................................2-245
ICTR_Read......................................................................................................................2-248
ICTR_Reset .....................................................................................................................2-250
ICTR_Setup.....................................................................................................................2-251
Init_DA_Brds...................................................................................................................2-255
Lab_ISCAN_Check.........................................................................................................2-263
Lab_ISCAN_Op ..............................................................................................................2-266
Lab_ISCAN_Start............................................................................................................2-270
Lab_ISCAN_to_Disk.......................................................................................................2-274
Line_Change_Attribute ...................................................................................................2-277
LPM16_Calibrate............................................................................................................. 2-279
MIO_Calibrate.................................................................................................................2-280
MIO_Config.....................................................................................................................2-284
RTSI_Clear......................................................................................................................2-286
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RTSI_Clock .....................................................................................................................2-287
RTSI_Conn......................................................................................................................2-289
RTSI_DisConn................................................................................................................2-291
SC_2040_Config.............................................................................................................2-292
SCAN_Demux................................................................................................................. 2-294
SCAN_Op........................................................................................................................2-296
SCAN_Sequence_Demux...............................................................................................2-300
SCAN_Sequence_Retrieve.............................................................................................. 2-303
SCAN_Sequence_Setup..................................................................................................2-304
SCAN_Setup ...................................................................................................................2-307
SCAN_Start .....................................................................................................................2-309
SCAN_to_Disk................................................................................................................2-315
SCXI_AO_Write.............................................................................................................2-319
SCXI_Cal_Constants....................................................................................................... 2-322
SCXI_Calibrate_Setup....................................................................................................2-330
SCXI_Change_Chan.......................................................................................................2-332
SCXI_Configure_Filter...................................................................................................2-333
SCXI_Get_Chassis_Info.................................................................................................2-336
SCXI_Get_Module_Info.................................................................................................2-338
SCXI_Get_State..............................................................................................................2-340
SCXI_Get_Status ............................................................................................................2-342
SCXI_Load_Config.........................................................................................................2-344
SCXI_ModuleID_Read...................................................................................................2-345
SCXI_MuxCtr_Setup......................................................................................................2-347
SCXI_Reset.....................................................................................................................2-349
SCXI_Scale .....................................................................................................................2-352
SCXI_SCAN_Setup........................................................................................................2-355
SCXI_Set_Config............................................................................................................2-357
SCXI_Set_Gain...............................................................................................................2-360
SCXI_Set_Input_Mode...................................................................................................2-361
SCXI_Set_State ...............................................................................................................2-362
SCXI_Set_Threshold.......................................................................................................2-364
SCXI_Single_Chan_Setup..............................................................................................2-366
SCXI_Track_Hold_Control ............................................................................................2-367
SCXI_Track_Hold_Setup................................................................................................2-368
Select_Signal...................................................................................................................2-372
Set_DAQ_Device_Info ...................................................................................................2-389
Timeout_Config ..............................................................................................................2-400
WFM_Chan_Control.......................................................................................................2-402
WFM_Check ...................................................................................................................2-404
WFM_ClockRate.............................................................................................................2-406
WFM_DB_Config...........................................................................................................2-411
WFM_DB_HalfReady.....................................................................................................2-413
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WFM_DB_Transfer.........................................................................................................2-415
WFM_from_Disk............................................................................................................. 2-417
WFM_Group_Control .....................................................................................................2-420
WFM_Group_Setup......................................................................................................... 2-423
WFM_Load......................................................................................................................2-425
WFM_Op.........................................................................................................................2-434
WFM_Rate.......................................................................................................................2-437
WFM_Scale .....................................................................................................................2-439
WFM_Set_Clock............................................................................................................. 2-441
Appendix A
Status Codes
Appendix B
Analog Input Channel, Gain Settings, and Voltage Calculation
DAQ Device Analog Input Channel Settings..................................................................B-1
Valid Internal Analog Input Channels......................................................... ..... ...... .........B-2
DAQ Device Gain Settings..............................................................................................B-5
Voltage Calculation .........................................................................................................B-5
Offset and Gain Adjustment............................................................................................B-7
Measurement of Offset......................................................................................B-7
Measurement of Gain Adjustment.....................................................................B-7
Contents
Appendix C
NI-DAQ Function Support
Appendix D
Customer Communication
Glossary
Index
Figures
Figure 2-1. High Alarm Deadband.............................................................................2-65
Figure 2-2. Low Alarm Deadband.............................................................................2-66
Figure 2-3. Analog Trigger Event..............................................................................2-70
Figure 2-4. ND_BELOW_LOW_LEVEL.................................................................2-85
Figure 2-5. ND_ABOVE_HIGH_LEVEL.................................................................2-85
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Contents
Figure 2-6. ND_INSIDE_REGION........................................................................... 2-85
Figure 2-7. ND_HIGH_HYSTERESIS.....................................................................2-86
Figure 2-8. ND_LOW_HYSTERESIS......................................................................2-86
Figure 2-9. Pulse Generation Timing ........................................................................2-102
Figure 2-10. Pulse Timing for pulseWidth = 0............................................................2-103
Figure 2-11. Square Wave Timing ..............................................................................2-112
Figure 2-12. Digital Scanning Input Group Handshaking Connections ...................... 2-190
Figure 2-13. Digital Scanning Output Group Handshaking Connections...................2-191
Figure 2-14. Simple Event Counting...........................................................................2-217
Figure 2-15. Single Period Measurement....................................................................2-219
Figure 2-16. Single Pulse Width Measurement...........................................................2-221
Figure 2-17. Single Triggered Pulse Width Generation Measurement ....................... 2-224
Figure 2-18. Start-Stop Measurement..........................................................................2-226
Figure 2-19. Single Pulse Generation..........................................................................2-228
Figure 2-20. Single Triggered Pulse Generation......................................................... 2-230
Figure 2-21. Retriggerable Pulse Generation ..............................................................2-232
Figure 2-22. Pulse Train Generation ...........................................................................2-233
Figure 2-23. Frequency Shift Keying..........................................................................2-235
Figure 2-24. Buffered Event Counting........................................................................2-236
Figure 2-25. Buffered Period Measurement................................................................2-238
Figure 2-26. Buffered Period Measurement when No Source Edges Are
Present between Gate Edges...................................................................2-239
Figure 2-27. Buffered Semi-Period Measurement when No Source Edges Are
Present between Gate Edges...................................................................2-239
Figure 2-28. Buffered Semi-Period Measurement when No Source Edges Are
Present between Gate Edges...................................................................2-240
Figure 2-29. Buffered Pulse Width Measurement.......................................................2-241
Figure 2-30. Buffered Pulse Width when Gate Is High during Arming...................... 2-241
Figure 2-31. Buffered Two-Signal Edge Separation Measurement............................2-243
Figure 2-32. Mode 0 Timing Diagram ........................................................................2-252
Figure 2-33. Mode 1 Timing Diagram ........................................................................2-252
Figure 2-34. Mode 2 Timing Diagram ........................................................................2-252
Figure 2-35. Mode 3 Timing Diagram ........................................................................2-253
Figure 2-36. Mode 4 Timing Diagram ........................................................................2-253
Figure 2-37. Mode 5 Timing Diagram ........................................................................2-253
Tables
Table 1. MIO and AI Devices...............................................................................xvii
Table 1-1. Status Values...........................................................................................1-1
Table 1-2. Primary Type Names ..............................................................................1-2
Table 1-3. The LabWindows/CVI Function Tree for Data Acquisition .................. 1-6
NI-DAQ FRM for PC Compatibles x
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Contents
Table 2-1. Parameter Settings for AI_Configure......................................................2-7
Table 2-2. Port 0 Digital I/O Lines Reserved...........................................................2-11
Table 2-3. Reglitching Parameters for Permissible Devices....................................2-28
Table 2-4. Voltage or Current Output Parameters....................................................2-29
Table 2-5. Parameter Values for FIFO Transfer Conditions....................................2-29
Table 2-6. Default Values for FIFO Transfer Condition..........................................2-30
Table 2-7. Parameter Setting Information for the Analog Filter .............................. 2-31
Table 2-8. Parameter Setting Information for the Digital Filter...............................2-31
Table 2-9. Parameter Setting Information for Output Enable..................................2-32
Table 2-10. Parameter Setting Information for Output Impedance............................2-32
Table 2-11. Parameter Setting Information for Output Attenuation...........................2-33
Table 2-12. Parameter Setting Information for Frequency Correction for
the Analog Filter......................................................................................2-34
Table 2-13. Parameter Setting Information for the Trigger Mode .............................2-35
Table 2-14. Parameter Setting Information for PLL Reference Frequency ...............2-35
Table 2-15. Parameter Setting Information for the SYNC Duty Cycle......................2-36
Table 2-16. Possible Calibrate_1200 Parameter Values.............................................2-51
Table 2-17. DAQEvent Messages ..............................................................................2-74
Table 2-18. Valid Counters and External Timing Signals for DAQEvent = 9...........2-78
Table 2-19. Usable Parameters for Different DAQ Events Codes............................. 2-79
Table 2-20. Legal Values for gpctrNum Parameter....................................................2-199
Table 2-21. Legal Values for paramValue when paramID = ND_SOURCE.............2-199
Table 2-22. Definition of Other Co unter for paramValue Set to
ND_OTHER_GPCTR_TC......................................................................2-200
Table 2-23. Default Source Selection for ND_SIMPLE_EVENT_CNT or
ND_BUFFERED_EVENT_CNT............................................................2-200
Table 2-24. Legal Values for paramValue when paramID = ND_GATE..................2-203
Table 2-25. Default Gate Selection............................................. ................................2-204
Table 2-26. Default Second Gate Selection...................................... ...... ....................2-205
Table 2-27. Legal Values for paramValue when
paramID = ND_INITIAL_COUNT........................................................2-206
Table 2-28. Legal Values for paramValue when paramID =
ND_COUNT_2, ND_COUNT_3, and ND_COUNT_4 .....................................2-206
ND_COUNT_1,
Table 2-29. Default Up/Down Selection ....................................................................2-207
Table 2-30. Legal Values for the action Parameter....................................................2-211
Table 2-31. Descriptions for application....................................................................2-216
Table 2-32. Terminal Count........................................................................................2-218
Table 2-33. SCXI Module Scan List ..........................................................................2-348
Table 2-34. MIO or AI Scan List................................................................................ 2-348
Table 2-35. Possible Values for signal....................................................................... 2-374
Table 2-36. Legal Parameters for the 6602 Devices...................................................2-385
Table 2-37. E Series Signal Name Equivalencies.......................................................2-387
Table 2-38. RTSI Bus Line and VXIbus Trigger Mapping........................................2-387
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Contents
Table 2-39. Data Ranges for the Buffer Parameter for DAQArb 5411 Devices........ 2-426
Table 2-40. Mode Values for the Count Parameter for DAQArb 5411 Devices.......2-427
Table 2-41. Mode Values for the Iterations Parameter for
DAQArb 5411 Devices.................................... .................................. .....2-428
Table 2-42. Array Structures for DDS Mode.............................................................2-430
Table 2-43. Array Structures for ARB Mode.............................................................2-431
Table A-1. Status Code Summary.............................................................................A-1
Table B-1. Valid Analog Input Channel Settings .....................................................B-1
Table B-2. Valid Internal Analog Input Channels....................................................B-2
Table B-3. Internal Channel Purposes for Analog Input Devices.............................B-4
Table B-4. Valid Gain Settings.................................................................................B-5
Table B-5. The Values of maxReading and maxVolt............................................... B-6
Table C-1. MIO and AI Device Functions................................................................C-1
Table C-2. Lab/516/DAQCard-500/700 Functions ..................................................C-6
Table C-3. DSA Device Functions ...........................................................................C-9
Table C-4. Analog Output Family Functions............................................................C-11
Table C-5. Digital I/O Family Functions..................................................................C-12
Table C-6. Timing Device Functions........................................................................C-14
Table C-7. SCXI Functions.......................................................................................C-16
NI-DAQ FRM for PC Compatibles xii
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National Instruments Corporation
The NI-DAQ Functi on Refe re nce M anu al f or PC Co mpat i ble s is f or users
of the NI-DA Q s oftware for PC com patibles version 6.1 . NI-D A Q software
is a powerful application programming interface (API) between your data
acquisition (DAQ) application and the National Instruments DAQ boards
for ISA, PCI, PXI, XT, PC Card (PCMCIA), VXIbus, EISA, and USB bu s
computers.
How to Use the NI-DAQ Manual Set
You should begin by reading the NI-DAQ User Manual for PC
Compatibles. Chapter 1, Introduction to NI-DAQ, contains a f low chart that
illustrates the sequence of steps you sh ould take to learn about and get
started with NI-DAQ software.
When you are familiar with the material in the NI-DAQ User Manual for
PC Compatibles, you can use the NI-DAQ Function Refer ence M anual for
PC Compatibles, which contains detailed descriptions of the NI-DAQ
functions. You also can use the Windows help file
contains all of the function reference material. Other documentation
includes the DAQ Hardware Overview Guide (
Configuration Utility help file (
Wizard help file (
CHANWIZ.HLP).
NIDAQCFG.HLP
About
This
Manual
NIDAQPC.HLP, which
HWOG.PDF), the NI-DAQ
and the DAQ Channel
,
)
Organization of This Manual
The NI-DAQ Function Reference Manual for PC Compatibles is organized
as follows:
• Chapter 1, Using the NI-DAQ Functions, contains important
information about how to apply the function descriptions in this
manual to your programming language and environment.
• Chapter2, Function Reference, contains a detailed explanation o f each
NI-DAQ function. The functions are arranged alphabetically.
•AppendixA, Status Codes, lists the status codes returned by NI-DA Q,
including the name and description.
©
National Instruments Corporation xiii NI-DAQ FRM for PC Compatibles
About This Manual
•AppendixB, Analog Input Channel, Gain Settings, and
Voltage Calculation, lists the valid channel and gain settings for DA Q
boards, describes how NI-DAQ calculates voltage, and describes the
measurement of offset and gain adjustment.
•AppendixC, NI-DAQ Function Support, contains tables that show
which DAQ hardware each NI-DAQ function call supports.
•AppendixD, Customer Communication, contains forms you can use to
request help from Nati onal Instruments o r to comment on our products
and manuals.
•The Glossary contains an alphabetical list and description of terms
used in this manual, including abbreviations, acronyms, metric
prefixes, mnemonics, and symbols.
•The Index contains an alphabetical list of key terms and topics in this
manual, including the page where you can find each one.
Conventions Used in This Manual
The following conventions are used in this manual.
This icon to the left of bold italicized text denotes a note, which alerts you
to important information.
!
1102/B/C modules Refers to the SCXI-1102, SCXI-1102B, and SCXI-1102C modules and
12-bit device These MIO and AI d evice s are listed in T able 1.
16-bit device These MIO and AI d evice s are listed in T able 1.
445X device Refers to the PCI-4 451 a nd PCI-44 52.
455X device Refers to the PCI-4 551 a nd PCI-45 52.
516 device Refers to the DAQCard-516 and PC-516.
611X device Refers to the PCI-6110E and PCI-6111E.
6602 device Refers to the PCI-6 602 a nd PXI- 6602 .
AI device These analog input devices are listed in Table 1.
NI-DAQ FRM for PC Compatibles xiv
This icon to the left of bold italicized text denotes a caution, which advises
you of precautions to take to avoid injury, data loss, or a system crash.
the VXI-SC-1102, VX I-S C-1 102B, an d V XI- SC-1 102C su bm odules .
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National Instruments Corporation
About This Manual
Am9513-based de vice These dev ice s a re the A T-MI O-16 , AT -MIO - 16F-5, A T-MI O -16X,
AT-MIO-16D, and AT-MIO-64F-5.
bold Bold text denotes the names of menus, menu items, paramete rs, dialog
boxes, dialog box buttons or options, icons, windows, Windows 95 tabs
or pages, or LEDs.
bold italic Bold italic text denotes a note, caution, or warning.
DAQArb 5411 device Refers to the AT-5411 and PCI-5411.
DAQCard-500/700 Refers to the DAQCard-500 and DAQCard-700.
DAQMeter 4350 Refers to the PC-4350, DAQCard-4350, and DAQPad-4350.
DIO 6533 Refers to the AT-DIO- 32HS, PCI-D IO-3 2HS, D AQCa rd-6 533, a nd
PXI-6533.
DIO-24 Refers to the PC -D IO -24, P C- DIO -24 PnP, a nd DAQC ard -D IO- 24.
DIO-32F Refers to the AT-DIO-32F.
DIO-96 Refers to the PC -D IO-9 6, PC -DI O -96 PnP, P CI -DIO -9 6,
DAQPad-6507, DA QP ad-6 508 , an d PXI -65 08.
DIO device Refers to any DIO-24, DIO-32, DIO-6533, or DIO-96.
DSA device Refers to the PC I-4451 , PCI- 445 2, PCI -45 51, a nd PCI-45 52.
E Series device These are MIO and AI devices. Refer to Table 1 for a complete list of
these devices.
italic Italic text denotes emphasis, a cross reference, or an introduction to
a key concept. This font a lso denotes text fo r which you supply the
appropriate word or value, such as in NI-DAQ 5.x.
Lab and 1200 analog Refers to the DAQCard-1200, DAQPad-1 200, La b-PC+, Lab-PC-1200,
output device PCI-1200, and SCXI-1200.
Lab and 1200 device Refers to the DAQCard-1200, DAQPad-1200, Lab-PC+, Lab-PC-1200,
Lab-PC-1200AI, PCI-1200, a nd SCXI-1200 .
LPM device Refers to the PC-L P M-16 an d PC -LP M-16P n P.
MIO device Refe rs to multifunction I/O devices. See Table 1 for a list of these
devices.
©
National Instruments Corporation xv NI-DAQ FRM for PC Compatibles
About This Manual
MIO-F-5/16X d ev ice Refers to the A T-M IO - 16F- 5, AT- MI O-16 X, a nd the AT -M IO -64F -5 .
MIO-16/16D d ev ice Refers to the A T -MIO - 16 an d AT -M IO- 16D .
MIO-16XE-50 d evi ce Refers to the A T-M IO -16X E -50, DA QP ad-M IO- 16X E-50 , an d
NEC-MIO-16XE-5 0, a nd PCI- MIO -16 XE-5 0.
MIO-64 Refers to the AT-MIO-64F-5, AT-MIO-64E-4, PCI-6031E, PCI-6033E,
PCI-6071E, VXI-MIO -64E-1, and VXI-M IO-64X E-10.
monospace Text in this font denotes text or characters that you should literally enter
from the keyboard, sections of co de, pro gramming ex ample s, and
syntax examples. This fo nt a lso is used for the pro per n am es of d isk
drives, paths, directories, programs, subprogram s, subroutines, device
names, functions, operations, variables, filenames, and extensions, and
for statements and c omm en ts take n from p rogra m code .
monospace italic
Italic text in this font denotes th at you mu st su pply the appr opriate
words or values in the place of these items.
NI-DAQ Refers to the NI-DA Q softwa re for PC co mpat ible s, unless other wi se
noted.
PC Refers to the IBM PC/XT, IBM PC AT, and compatible computers.
PCI Series Refers to the National Instrum ents p rod ucts that use the
high-performance expan sion bus architec ture origin ally develope d
by Intel to replace ISA and EISA.
Remote SCXI Refers to an SCXI configuration where either an SCXI-2000 chassis or
an SCXI-2400 remote commu nications module is connected to the PC
serial port.
SCXI-1102/B/C SCXI-1102/B/C refers to the SCX I-11 02, SCX I-11 02B , an d
SCXI-1102C devices.
SCXI-1120/D SCXI-1120/D refers to the SCXI-112 0 and SCXI-11 20D.
SCXI analog i np ut Refers to t he S C XI -1 100, SC X I-1102 , S CXI-1 120 , S CXI-1 120 D,
module SCXI-1121, SCXI-1122, SCXI- 1140, and SCX I-1141 .
SCXI chassis Refers to the SCXI-1000, SCXI-1000DC, SCXI-1001, and SCXI-2000.
SCXI digital modul e Refers to the SCXI -1160 , SCXI-1 161, S CXI-1 162, SCX I-1162 HV,
SCXI-1163, and SCXI-1163 R.
NI-DAQ FRM for PC Compatibles xvi
©
National Instruments Corporation
About This Manual
Simultaneous sampling Refers to the PCI-6110E, PCI-6111E, PCI-4451, PCI-4452, PCI-4551,
device and PCI-4552.
VXI-MIO device Refers to the VXI-MIO-64E-1 and VXI-MIO-64XE-10.
VXI-SC-1102/B/C Refers to the VXI-SC-1102 , VXI-SC- 110 2B, a nd V XI-SC -11 02C.
MIO and AI Device Terminology
This manual uses generic terms to describe groups of devices whenever
possible. The generic terms for the MIO and AI devices are based on
the number of bits, the platform, the functionality, and the series name
of the devices. Table 1 lists each MIO and AI device and the possible
classifications for each.
Table 1.
Number
of SE
Device
AT-AI-16XE-10 16 16-bit AT AI E Series
AT-MIO-16 16 12-bit AT MIO Am9513-based
AT-MIO-16D 16 12-bit AT MIO Am9513-based
AT-MIO-16DE-10 16 12-bit AT MIO E Series
AT-MIO-16E-1 16 12-bit AT MIO E Series
AT-MIO-16E-2 16 12-bit AT MIO E Series
AT-MIO-16E-10 16 12-bit AT MIO E Series
AT-MIO-16F-5 16 12-bit AT MIO Am9513-based
AT-MIO-16X 16 16-bit AT MIO Am9513-based
AT-MIO-16XE-10 16 16-bit AT MIO E Series
AT-MIO-16XE-50 16 16-bit AT MIO E Series
AT-MIO-64E-3 64 12-bit AT MIO E Series
AT-MIO-64F-5 64 12-bit AT MIO Am9513-based
DAQCard-AI-16E-4 16 12-bit PCMCIA AI E Series
Channels
MIO and AI Devices
Bit Type Functionality Series
DAQCard-AI-16XE-50 16 16-bit PCMCIA AI E Series
DAQPad-MIO-16XE-50 16 16-bit Parallel Port MIO E Series
DAQPad-6020E 16 12-bit USB MIO E Series
NEC-AI-16E-4 16 12-bit NEC AI E Series
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National Instruments Corporation xvii NI-DAQ FRM for PC Compatibles
About This Manual
Table 1. MIO and AI Devices (Continued)
Number
Device
NEC-AI-16XE-50 16 16-bit NEC AI E Series
NEC-MIO-16E-4 16 12-bit NEC MIO E Series
NEC-MIO-16XE-50 16 16-bit NEC MIO E Series
PCI-6031E (MIO-64XE-1 0) 64 16-bit PCI MIO E Series
PCI-6032E (AI-16XE-10) 16 16-bit PCI AI E Series
PCI-6033E (AI-64XE-10) 64 16-bit PCI AI E Series
PCI-6071E (MIO-64E-1) 64 12-bit PCI MIO E Series
of SE
Channels
Bit Type Functionality Series
PCI-6110E 4 diff.
only
PCI-6111E 2 diff.
only
PCI-MIO-16E-1 16 12-bit PCI MIO E Series
PCI-MIO-16E-4 16 12-bit PCI MIO E Series
PCI-MIO-16XE-10 16 16-bit PCI MIO E Series
PCI-MIO-16XE-50 16 16-bit PCI MIO E Series
PXI-6011E 16 16-bit PXI MIO E Series
PXI-6030E 16 16-bit PXI MIO E Series
PXI-6040E 16 12-bit PXI MIO E Series
PXI-6070E 16 12-bit PXI MIO E Series
VXI-MIO-64E-1 64 12-bit VXI MIO E Series
VXI-MIO-64XE-10 64 16-bit VXI MIO E Series
12-bit AI
16-bit AO
12-bit AI
16-bit AO
PCI MIO E Series
PCI MIO E Series
NI-DAQ FRM for PC Compatibles xviii
©
National Instruments Corporation
About This Manual
About the National Instruments Documentation Set
The NI-DAQ Function Reference Manual for PC Compatibles is one piece
of the documentation set for your DAQ system. You might have any of
several types of manuals, depending on the hardware and software in your
system. Use these manuals as follows:
• Your SCXI hardware user manuals—If y ou are using SCXI, read these
manuals next for detailed information about signal connections and
module configuration. They also explain in greater detail how the
module works and contain application hints.
• Your DAQ hardware user manuals—These manuals have detailed
information about the DAQ hardware that plugs into or is connected
to your computer. Use these manuals for hardware installation and
configuratio n i ns truct i on s, speci fication informati o n abo ut you r DAQ
hardware, and application hint s .
• Software documentation—Examples of software documentation you
might have are the ComponentWorks, LabVIEW and
LabWindows/CVI, VirtualBench, and NI-DAQ documentation. After
you have set up your hardware system, use either the application
software or the NI-D AQ do cuments to help you write your application.
If you have a large and complicated system, it is worthwhile to look
through the software manuals before you configure your hardware.
• Accessory installation guides or manuals—If you are using accessory
products, read the terminal block and cable assembly installation
guides or accessory board user manuals. They explain how to
physically connect the relevant pieces of the system. Consult these
guides when you are making your connections.
• SCXI Ch assis User Ma nual—If you are us ing SCXI, read this manual
for maintenance information on the chassis an d installation
instructions.
©
National Instruments Corporation xix NI-DAQ FRM for PC Compatibles
About This Manual
Related Documentation
The following documen ts contai n i nfo rmati on yo u may find useful as you
read this manual:
For detailed hardware information, refer to the user manual included with
each board. The following manuals are available from National
Instruments:
• Microsoft Visual C++ User Guide to Programming
• Ome ga Temperature Handbook
• NIST Monograph 125, Thermocouple Reference Tables
Customer Communication
National Instruments wants to receive your comments on our products
and manuals. We are interested in the applications you develop with
our products, and we want to help if you have problems with them.
To make it easy for you to contact us, this manual contains comment
and configuration forms for you to complete. These forms are in
Appendix D, Custome r Communication, at the end of this manual.
NI-DAQ FRM for PC Compatibles xx
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National Instruments Corporation
Chapter
Using the NI-DAQ Functions
This chapter contains important information about how to apply the
function descriptions in this manual to your programming language and
environment.
When you are familiar with the material in the NI-DAQ User Manual for
PC Compatibles, you can use this manual for detailed information about
each NI-DAQ function.
1
Status Codes, Device Numbers, and SCXI Chassis IDs
Every NI-DAQ function is of the following form:
status
=
Function_Name (parameter 1, parameter 2, … parameter n)
where n ≥ 0. Each function returns a value in the
indicates the success or failure of the function, as shown in Table 1-1.
Table 1-1.
Status Result
Status Values
status
variable that
Negative Function did not execute because of an error
Zero Function completed successfully
Positive Fu nction executed but with a potentially serious
side effect
Note
©
National Instruments Corporation 1-1 NI-DAQ FRM for PC Compatibles
In all applications,
contains a list of
In the parameter tables that follow the status codes, the first parameter to
almost ev ery NI-DA Q functi on is the device n umber of the D AQ d evice you
want NI-DAQ to use for the given operation. After you have followed the
installation and configuration instructions in the NI-D A Q release notes and
Chapter 1, Introduction to NI-DAQ, of the NI-DAQ User Manual for PC
Compatibles, you can use the NI-DAQ Configuration Utility to determine
the device number for each de vice you ha ve installed in the system.You can
status
status
is always a 16-bit integer. Appendix A,
codes.
Status Codes
,
Chapter 1 Using the NI-DAQ Functions
use the configuration utility to verify your device numbers. You can use
multiple DAQ devices in one application; to do so, simply pass the
appropriate device number to each function.
If you are using SCXI, you must pass the chassis ID that you assigned to
your SCXI chassis in the configuration utility to the SCXI functions that
you use. For many of the SCXI functions, you must also pass the module
slot number of the module you want to use. The slots in the SCXI chassis
are numbered from left to rig ht, beginning wi th slot 1. The controlle r on the
left side of the chassis is referred to as Slot 0. Y ou can use the configuration
utility to verify your chassis IDs and your module slot numbers.
Variable Data Types
The NI-DAQ API is identical in Windows 95 and Windows NT. Every
function description has a parameter table that lists the data types in each
of the environments. LabWindows/CVI uses the same types as Windows.
The following sections describe the notation used in those parameter tables
and throughout the manual for variable data types.
Primary Types
Table 1 -2 shows the primary type names and their ranges.
Type
Name
u8 8-bit ASCII
i16 16-bit signed
Description Range
0 to 255
character
–32,768 to 32,767
integer
Table 1-2.
Primary Type Names
C/C++ Visual BA SIC
char
short Integer
Not supported by
BASIC. For functions
that require ch arac ter
arrays, use string
types instead. See the
STR description.
(for example:
deviceNum%
Type
Pascal (Borland
Delphi)
Byte
SmallInt
)
NI-DAQ FRM for PC Compatibles 1-2
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Chapter 1 Using the NI-DAQ Functions
Type
Name
u16 16-bit uns igned
i32 32-bit signed
u32 32-bit uns igned
f32 32-bit
f64 64-bit
STR BASIC or
Description Range
integer
integer
integer
single-precision
floating point
double-precisio
n floating point
Pascal characte r
string
Table 1-2.
0 to 65,535
–2,147,483,648 to
2,147,483,647
0 to 4,294,967,295
–3.402823 x 1038 to
3.402823 x 10
–1.797683134 862 31 5
30
8
×
10
to
1.797683134862315
308
×
10
Primary Type Names (Continued)
38
—
C/C++ Visual BASIC
unsigned
short for
32-bit
compilers
long Long
unsigned
long
float Single
double Double
Use character
array terminat ed
by the null
character
\0
Not supported by
BASIC. For functions
that require unsigned
integers, use the
signed integer type
instead. See the i16
description.
(for example:
count&
Not supported by
BASIC. For functions
that require unsigned
long integers, us e the
signed long integer
type instead. See th e
i32 description.
example:
example:
voltage#
String
example:
filename$
Type
)
(for
num!
(for
(for
Pascal (Borland
Delphi)
Word
LongInt
Cardinal
32-bit operating
systems). Refer to
the i32
description.
Single
)
Double
)
String
)
(in
Arrays
When a primary type is inside square brackets (for example, [i16]) an array
of the type named is required for that parameter.
Multiple Types
Some parameters can be in multiple types. Combinations of the primary
types separated by commas denote parameters with th is ability, as in the
following example:
[i16], [f32]
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National Instruments Corporation 1-3 NI-DAQ FRM for PC Compatibles
Chapter 1 Using the NI-DAQ Functions
The previous example describes a parameter that can accept an array of
signed integers or an array of floating-point numbers.
Programming Language Considerations
Apart from the data type differences, there are a few language-dependent
considerations you need to be aware of when you use the NI-DAQ API.
Read the following sections that apply to your programming language.
Note
Be sure to include the NI-DAQ function prototype files by including the
appropriate NI-DAQ header file in your source code.
Borland Delphi
When you pass arrays to NI-DAQ functions using Borland Delphi in
Windows, you need to pass a pointer to the array. You can either declare an
array and pass the array address to the NI-DAQ function, or you can
declare a pointer, dynamically allocate memory for the pointer, and pass
the pointer directly to the NI-DAQ function. For example,
var
buffer : array [1..1000] of Integer;
bufPtr : ^Integer;
status := DAQ_Start (device, chan, gain, @buffer, count,
timebase, sampInterval);
or
(* allocate memory for bufPtr first using AllocMem or
New *)
status := DAQ_Start (device, chan, gain, bufPtr, count,
timebase, sampInterval);
Visual Basic for Windows
When you pass arrays to NI-DAQ functions using Visual Basic for
Windows, you need to pass the first element of the array by referen ce. For
example, you would call the
syntax:
status% = DAQ_Start (device%, chan%, gain%, buffer%(0),
count&, timebase%, sampInterval%)
DAQ_Start
function using the following
NI-DAQ FRM for PC Compatibles 1-4
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National Instruments Corporation
Chapter 1 Using the NI-DAQ Functions
NI-DAQ Constants Include File
The file NIDAQCNS.INC contains definitions for constants required for
some of the NI-DAQ functions. You should use the constants symbols in
your programs; do not use the numerical values.
In Visual Basic for Windows, you can add the entire
NIDAQCNS.INC file
into your project. You then will be able to use any of the constan ts def i ned
in this file in any module in your program.
T o add the
NIDAQCNS.INC file for your pr oject in V isual Ba sic 3.0 and 4.0,
go to the File menu and select the Add File... option. Select
NIDAQCNS.INC, which is the Include subdirectory of NI-DAQ
subdirectory. Then, select Open to add the file to the project.
To add the
NIDAQCNS.INC file to your project in Visual Basic 5.0, go to
the Project menu and select Add Module. Click on the Existing tab page.
NIDAQCNS.INC, which is the Include subdirectory of your
Select
NI-DAQ directory. Then, select Open to add the file to the project.
This procedure is identical to the procedure you would follow wh en loading
the Visual Basic f ile
CONSTANT.TXT. Search on the word CONSTANT for
more information from the V isual Basic on-line help. Alternatively , you can
cut and paste individual lines from this file and place them in the module
where you need them. Ho wever , if you do so, yo u shoul d remo v e the w or d
Global from the CONSTANTS definition.
For example,
GLOBAL CONST ND_DATA_XFER_MODE_AI& = 14000
would become:
CONST ND_DATA_XFER_MODE_AI& = 14000
NI-DAQ for LabWindows/CVI
Inside the LabWindows/CVI environment, the NI-DAQ functions appear
in the Data Acquisition function panels under the Libraries menu. Each
function panel represents an NI-DAQ function, which is displayed at the
bottom of the panel. The function panels have help text for each function
and each parameter; however, if you n eed ad ditional inf ormatio n, y ou can
look up the appropriate NI-DAQ function alphabetically in Chapter 2,
Function Reference of this manual.
©
National Instruments Corporation 1-5 NI-DAQ FRM for PC Compatibles
Chapter 1 Using the NI-DAQ Functions
Table 1-3 shows how the LabWindows/CVI function panel tree is
organized, and the NI-DAQ function name that corresponds to each
function panel.
Table 1-3.
LabWindows/CVI Function Panel NI-DAQ Function
Data Acquisition
Initialization/Utilities
Initialize Board
Configure Timeout
Get Device Information
Set Device Information
Align DMA Buffer
Get DAQ Library Version
Select E-Series Signals
Config Analog Trigger
Change Line Attribute
Board Config & Calibrate
Configure MIO Boards
Configure AMUX Boards
The LabWindows/CVI Function Tree for Data Acquisition
Init_DA_Brds
Timeout_Config
Get_DAQ_Device_Info
Set_DAQ_Device_Info
Align_DMA_Buffer
Get_NI_DAQ_Version
Select_Signal
Configure_HW_Analog_Trigger
Line_Change_Attribute
MIO_Config
AI_Mux_Config
Configure SC-2040
Calibrate MIO Boards
Calibrate E Series
Calibrate LPM-16
Calibrate Analog Output
Calibrate 1200 Devices
Calibrate DSA Devices
NI-DAQ FRM for PC Compatibles 1-6
SC_2040_Config
MIO_Calibrate
Calibrate_E_Series
LPM16_Calibrate
AO_Calibrate
Calibrate_1200
Calibrate_DSA
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National Instruments Corporation
Chapter 1 Using the NI-DAQ Functions
LabWindows/CVI Function Panel NI-DAQ Function
Analog Input
Single Point
Change Analog Input Parameter
Measure Voltage
Clear Analog Input
Read Analog Binary
Scale Binary to Voltage
Setup Analog Input
Check Analog Input
Configure Analog Input
Multiple Point
Acquire Single Channel
Scan Multiple Channels
Scan Lab Channels
Table 1-3.
The LabWindows/CVI Function Tree for Data Acquisition (Continued)
AI_Change_Parameter
AI_VRead
AI_Clear
AI_Read
AI_VScale
AI_Setup
AI_Check
AI_Configure
DAQ_Op
SCAN_Op
Lab_ISCAN_Op
Single Scan Binary
Single Scan Voltage
Single Channel to Disk
Multiple Chan to Disk
Scan Lab Chan to Disk
AI_Read_Scan
AI_VRead_Scan
DAQ_to_Disk
SCAN_to_Disk
Lab_ISCAN_to_Disk
Low-Level Functions
Convert DAQ Rate
Start DAQ
Setup Scan
Setup Sequence of Scans
Retrieve Scan Sequence
©
National Instruments Corporation 1-7 NI-DAQ FRM for PC Compatibles
DAQ_Rate
DAQ_Start
SCAN_Setup
SCAN_Sequence_Setup
SCAN_Sequence_Retrieve
Chapter 1 Using the NI-DAQ Functions
Table 1-3.
The LabWindows/CVI Function Tree for Data Acquisition (Continued)
LabWindows/CVI Function Panel NI-DAQ Function
Start Scan
Check DAQ or Scan
Assign Rate to DAQ Group
Monitor DAQ or Scan
Start Lab Scan
Check Lab Scan
Clear DAQ or Scan
Scale DAQ or Scan
Reorder Scan Data
Reorder Scan Seq Data
Configure DAQ
Config DAQ Pretrigger
Config Double Buffering
Is Half Buffer Read y?
SCAN_Start
DAQ_Check
DAQ_Set_Clock
DAQ_Monitor
Lab_ISCAN_Start
Lab_ISCAN_Check
DAQ_Clear
DAQ_VScale
SCAN_Demux
SCAN_Sequence_Demux
DAQ_Config
DAQ_StopTrigger_Config
DAQ_DB_Config
DAQ_DB_HalfReady
Half Buffer to Array
Analog Output
Single Point
Generate Voltage
Scale Voltage to Binary
Write Analog Binary
Update Analog DACs
Configure Analog Output
Change Analog Output Parameter
NI-DAQ FRM for PC Compatibles 1-8
DAQ_DB_Transfer
AO_VWrite
AO_VScale
AO_Write
AO_Update
AO_Configure
AO_Change_Parameter
©
National Instruments Corporation
Chapter 1 Using the NI-DAQ Functions
Table 1-3.
The LabWindows/CVI Function Tree for Data Acquisition (Continued)
LabWindows/CVI Function Panel NI-DAQ Function
Waveform Generation
Generate WFM from Array
Generate WFM from Disk
WFM_Op
WFM_from_Disk
Low-Level Functions
Scale Waveform Buffer
Convert Waveform Rate
Assign Waveform Group
Load Waveform Buffer
Assign Rate to WFM Group
Control Waveform Group
Pause/Resume WF M Cha nnel
Check Waveform Channel
Enable Double Buffering
Is Half Buffer Read y?
WFM_Scale
WFM_Rate
WFM_Group_Setup
WFM_Load
WFM_ClockRate, WFM_Set_Clock
WFM_Group_Control
WFM_Chan_Control
WFM_Check
WFM_DB_Config
WFM_DB_HalfReady
Copy Array to WFM Buffer
WFM_DB_Transfer
Digital Input/Output
Configure Port
Configure Line
Read Port
Read Line
Write Port
Write Line
Get Port Status
Configure Trigger
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National Instruments Corporation 1-9 NI-DAQ FRM for PC Compatibles
DIG_Prt_Config
DIG_Line_Config
DIG_In_Port
DIG_In_Line
DIG_Out_Port
DIG_Out_Line
DIG_Prt_Status
DIG_Trigger_Config
Chapter 1 Using the NI-DAQ Functions
Table 1-3.
The LabWindows/CVI Function Tree for Data Acquisition (Continued)
LabWindows/CVI Function Panel NI-DAQ Function
Group Mode
Configure Group
Read Group
Write Group
Get Group Status
Set Group Mode
DIG_Grp_Config
DIG_In_Grp
DIG_Out_Grp
DIG_Grp_Status
DIG_Grp_Mode
Block Transfer
Read Block
Write Block
Check Block
Clear Block
Set Up Pattern Generation
Set Up Digital Scanning
Enable Double Buffering
DIG_Block_In
DIG_Block_Out
DIG_Block_Check
DIG_Block_Clear
DIG_Block_PG_Config
DIG_SCAN_Setup
DIG_DB_Config
Is Half Buffer Read y?
Transfer To/From Array
SCXI
Load SCXI Configuration
Change Configuration
Get Chassis Config Info
Get Module Config Info
Read Module ID Register
Reset SCXI
Set Up Single AI Channel
Set Up Muxed Scanning
NI-DAQ FRM for PC Compatibles 1-10
DIG_DB_HalfReady
DIG_DB_Transfer
SCXI_Load_Config
SCXI_Set_Config
SCXI_Get_Chassis_Info
SCXI_Get_Module_Info
SCXI_ModuleID_Read
SCXI_Reset
SCXI_Single_Chan_Setup
SCXI_SCAN_Setup
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National Instruments Corporation
Chapter 1 Using the NI-DAQ Functions
Table 1-3.
The LabWindows/CVI Function Tree for Data Acquisition (Continued)
LabWindows/CVI Function Panel NI-DAQ Function
Set Up Mux Counter
Set Up Track/Hold
Control Track/Hold State
Select Gain
Configure Filter
Select Scanning Mode
Change AI Channel
Scale SCXI Data
Write to AO Channel
Set Digital or Relay State
Get Digital or Relay State
Get Status Register
Set Up Calibration Mode
Change Cal Constants
SCXI_MuxCtr_Setup
SCXI_Track_Hold_Setup
SCXI_Track_Hold_Control
SCXI_Set_Gain
SCXI_Configure_Filter
SCXI_Set_Input_Mode
SCXI_Change_Chan
SCXI_Scale
SCXI_AO_Write
SCXI_Set_State
SCXI_Get_State
SCXI_Get_Status
SCXI_Calibrate_Setup
SCXI_Cal_Constants
Set Threshold Values
SCXI_Set_Threshold
Counter/Timer
DAQ-STC Counters (GPCTR)
Select Ctr Application
Change Ctr Parameter
Configure Ctr Buffer
Control Ctr Operation
Monitor Ctr Properties
GPCTR_Set_Application
GPCTR_Change_Parameter
GPCTR_Config_Buffer
GPCTR_Control
GPCTR_Watch
Am9513 Counters (CTR)
Configure Counter
Count Events
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National Instruments Corporation 1-11 NI-DAQ FRM for PC Compatibles
CTR_Config
CTR_EvCount
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