Measurement-computing Data Acquisition Systems rev.10.4 Manuel d'utilisateur Page 219
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Parameter Type Definitions
deviceType–(DaqDacDeviceType)
Definition
chan Value
Description
0 Start the transfer of waveform/pattern output data where DAC0 is one of the
channels being output.
1 Start the transfer of waveform/pattern output data where DAC1 is one of the
channels being output.
2
Start the transfer of waveform/pattern output data where DAC2 is one of the
channels being output.
DddtLocal
3
Start the transfer of waveform/pattern output data where DAC3 is one of the
channels being output.
WaveType-(DaqDacWaveType)
Definition Description
DdwtSine
Output a sine wave
DdwtSquare
Output a square wave
DdwtTriangle
Output a triangle wave
Returns
DerrInvDacChan The DAC channel number doesn’t exist
DerrInvDacParam Parameters were out-of-range
DerrInvPredefWave Predefined waveform is not supported
DerrMemAlloc Not enough memory was available to build the waveform
DerrNotCapable Hardware is not capable of this function
DerrNoError No error
For more details on error messages refer to the Daq Error Table.
Function Usage
The daqDacWaveSetPredefWave function creates the defined waveform on the specified channel buffer
as soon as the acquisition is armed—however, this function should only be used in static output mode.
DaqBoard (ISA-Type), DaqBook/2000 Series, DaqBoard/2000 Series, and cPCI
DaqBoard/2000c Series
When using the daqDacWaveSetPredefWave function with the DaqBoard(ISA) devices, it is important to
note that they use 12-bit DAC’s. However, for consistancy, all functions use 16-bit values. The driver will
convert 16-bit parameters to appropriate 12-bit values for the DaqBoard (ISA), while the 16-bit value is passed
directly to 1000 Series and 2000 Series devices.
Thus, an amplitude or offset value of 0 corresponds to the minimum output of the DAC, as follows:
• -10V for DaqBoard/2000 Series
• 0V for DaqBoard (ISA-type)
A value of 65,535 corresponds to the maximum output of the DAC, as follows:
• 10V for DaqBoard/2000 Series
• 5V for DaqBoard (ISA-type)
The specifications section of the device user’s manual provides the resolution values for the device; for
example: the voltage for a DaqBoard/2000 Series devices has a resolution of approximately 0.305 mV
(20 V / 65,535).
Programmer’s Manual 908494 Daq API Command Reference 4.4-37
- *372195A-01* 1
- How to use this Manual 3
- 908494 Programmer’s Manual 4
- Table of Contents 5
- Introduction 1 7
- Language Support 8
- Driver Installation 9
- 908494 Programmer’s Manual 10
- Data Acquisition Environment 11
- Signal Environment 12
- 988594 Programmer’s Manual 14
- For x% = 0 To 3 30
- 0, 0, x%, bitVal&) 30
- Next x% 30
- Zero Compensation 33
- Linear Conversion 35
- End Sub 36
- Using Multiple Devices 3 37
- Internal Clock Method 40
- Master Clock Method 41
- External Clock Method 43
- Overview 45
- 938395 Programmer’s Manual 46
- Mask and Flag Definitions 50
- 961 962 963 ... 999 59
- 941 942 ... 958 959 960 59
- Raw Data Formats 81
- Setting the Scan Rate 89
- Scan Rate Mode 89
- Scan Rate State 90
- Actual Scan Rate 90
- 94
- DBK16-Read Offset Trimpot 95
- DBK43-Read Offset Trimpot 96
- Typical flags Settings 100
- Settings 101
- Prototypes 102
- Program References 102
- Function Usage 104
- Visual BASIC 105
- Returns 114
- Data Transfer Progress 115
- Example Acquisition States 116
- DazcNone 124
- DazcAutoZero 124
- Parameter Type Description 129
- Definition Description 129
- Purpose 131
- Offset value to apply 142
- Parameter Values 144
- parameters 148
- Parameter Summary 150
- Parameter Type Definitions 150
- Moving Averages 160
- Definition Description 165
- Using Thermocouples (T/Cs) 172
- T/C Gains Settings 173
- Daq/2000 Series devices* 174
- Setting the Output Mode 184
- Buffer Management 201
- DAC0 DAC1 DAC2 DAC3 P3 DO 202
- DAC0 DAC2 P3 DO 202
- Note 1: 206
- Offset for header in bytes 208
- Update Cycle Data Blocks 211
- Update/Sample Data Format 212
- Output From File Operation 212
- DaqBoard/2000c Series 219
- Setting the DAC Value 227
- 908794 Programmer’s Manual 232
- (continued) 249
- DdiProtocolInfo 251
- DdiExtFeatures 251
- Local I/O 262
- Expansion I/O 262
- Local I/O 266
- 957193 Programmer’s Manual 280
- (for 14 sample settings 282
- 2, 4, 8, 16, 32, 64 282
- 128, etc. up to 16384) 282
- Option Value (optionValue) 284
- Counter Mode 285
- 908594 Programmer’s Manual 286
- Set the Excitation Source 289
- DmotWbk14ExcSrcApply 289
- Sets the Dac Offset 290
- Use DC coupling when 290
- Example: 291
- DcovWbk17Mode_Period 295
- DcovWbk17Mode_Pulsewidth 296
- DcovWbk17Mode_Timing 296
- DcovWbk17Mode_Encoder 296
- Setting the Trigger Level 306
- API Error Codes - daqError 319
- A2 - 162 331
- Programmer’s Manual 332
- Appendix A A 333
- 988294 Programmer’s Manual 334
- 939198 Programmer’s Manual 336
- Custom OEM Installation C 337
- WIN 9x/Me WIN NT/2000/XP 338
- WIN 9x/Me and 338
- WIN NT/2000/XP 338
- Installation Locations: 339
- 958293 Programmer’s Manual 340
- 938295 Programmer’s Manual 342
- Format 347
- Time-of-Day Configuration 356
- Glossary 359
- 986896 Programmer’s Manual 360
- 986896 Glossary G-3 361
- 986896 Glossary G-5 363
- 986896 Glossary G-7 365
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