Measurement-computing Data Acquisition Systems rev.10.4 Bedienungsanleitung Seite 39
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Programmer’s Manual 908494 Using Multiple Devices 3-3
Synchronous Operation of Multiple Devices
The following sections describe methods for synchronizing input data with multiple DaqX compatible
devices. Three synchronization methods will be discussed:
o Internal Clock Method
o Master Clock Method
o External Clock Method
The synchronization method available depends upon the device, i.e., its ability to be externally triggered
or externally clocked. The following table shows the capabilities of each device as well as the physical
location of the external trigger and pacer input/output clocks.
Device External TTL Trigger External Acquisition
Pacer Clock
Min. External
Clock Interval
Acquisition Pacer
Clock Output
WaveBook/512 Yes (pin 13 on DB25F) No NA No
WaveBook/516 Yes (pin 13 on DB25F) Yes (pin 20 on DB25F) 1us (1MHz) No
DaqBooks Yes (P1; pin 25) No NA No
Daq PC-Card Yes (P1; pin 25) No NA No
DaqBoard(ISA) Yes (P1; pin 25) No NA No
TempBook Yes No NA No
DaqBoard/500 Series Yes (pin 6 on SCSI ;
TTLTRG on TB-100)
Yes (pin 2 on SCSI ;
XAPCR on TB-100)
5us (200kHz) Yes (pin 2 on SCSI ;
XAPCR on TB-100)
DaqBoard/1000 Series Yes (pin 6 on SCSI ;
TTLTRG on TB-100)
Yes (pin 2 on SCSI ;
XAPCR on TB-100)
5us (200kHz) Yes (pin 2 on SCSI ;
XAPCR on TB-100)
DaqBoard/2000 Series
1
Yes (P1; pin 25)
Note 2
Yes (P1; pin 20) Note 2 5us (200kHz) Yes (P1;pin 20) Note 2
DaqBoard/2000c Series
1
Yes (P1; pin 25)
Note 2 Yes (P1; pin 20) Note 2 5us (200kHz) Yes (P1; pin 20) Note 2
DaqBook/2000 Series Yes (P1; pin 25) Note 3 Yes (P1; pin 20) Note 3 5us (200kHz) Yes (P1; pin 20) Note 3
DaqScan/2000 Series Yes (P1; pin 25) Yes (P1; pin 20) 5us (200kHz) Yes (P1; pin 20)
DaqLab/2000 Series Yes (P1; pin 25) Yes (P1; pin 20) 5us (200kHz) Yes (P1; pin 20)
DaqBoard/3000 Series Yes (pin 6 on SCSI;
TTLTRG on TB-100)
Yes (pin 2 on SCSI ;
XAPCR on TB-100)
1us (1MHz) Yes (pin 2 on SCSI ;
XAPCR on TB-100)
Synchronization Methods Available
Device Internal Clock
Method
Master Clock
Method
External Clock
Method
WaveBook/512 Yes No No
WaveBook/516 Yes Slave only Yes
DaqBooks Yes No No
Daq PC Card Yes No No
DaqBoard(ISA) Yes No No
TempBook Yes No No
DaqBoard/500 Series Yes No Yes
DaqBoard/1000 Series Yes Master or Slave Yes
DaqBoard/2000 Series Note 1 Yes Master or Slave Yes
cPCI DaqBoard/2000c Series Note 1 Yes Master or Slave Yes
DaqBook/2000 Series Yes Master or Slave Yes
DaqScan/2000 Series Yes Master or Slave Yes
DaqLab/2000 Series Yes Master or Slave Yes
DaqBoard/3000 Series Yes Master or Slave Yes
Notes:
1 Excludes DaqBoard/2003 and cPCI DaqBoard/2003c.
2 The P1 connector for DaqBoard/2000 Series and DaqBoard/2000c Series boards is obtained by connecting a
DBK200 Series option to the board’s P4 connector.
3 DaqBook/2020 has a BNC connector for External TTL Trigger and a BNC connector for the external pacer clock.
These BNC connectors are in addition to P1 connector pins 25 and 20.
- *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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