Campbell CDM-VW300 Series Manuál stáhnout pdf (Strana 57)

CDM-VW300 Series Dynamic Vibrating-Wire Analyzers

7.10 CRBasic Programming

7.10.1 Writing Programs

In field-mode installations, the system datalogger requires a user-entered

CRBasic program. Programs can be written either from scratch using CRBasic

instructions or copied from the example programs provided in Appendix G,

CRBasic Program Library. The following CRBasic instructions are used. For

details concerning each instruction, consult CRBasic Editor Help. CRBasic

Editor is included with PC400, LoggerNet, and RTDAQ datalogger support

software.

CDM_VW300Config() sends configuration settings to the CDM-VW300. It is

placed before the BeginProg statement in the CRBasic program. Before

starting the datalogger program, the datalogger configures the specified

analyzer according to the arguments in this instruction.

CDM_VW300Config() cannot be used to set the CPI address of the CDM-

VW300. See Section 7.5.9, CPI Bus Address, for information on how to set

the CPI address.

CDM_VW300Config(DeviceType, CPIAddress, SysOptions,

ChanEnable, ResonAmp, LowFreq, HighFreq, ChanOptions,

Mult, Offset, SteinA, SteinB, SteinC, RF_MeanBins,

RF_AmpBins, RF_LowLim, RF_HighLim, RF_Hyst, RF_Form)

Scan() sets the scan interval to match the desired scan rate used for CDM-

VW300 dynamic readings. For example:

Scan(50,msec,100,0)

is the Scan() instruction with arguments set for a 20 Hz CDM-VW300 scan

rate. TABLE 7-4 lists other scan matches.

TABLE 7-4. CDM-VW300 Scan Rate / Datalogger

Scan() Interval Pairings

CDM-VW300 Scan Rate

Datalogger Scan()

Interval

20 Hz 50 ms

50 Hz 20 ms

100 Hz 10 ms

The CR3000, CR1000, and CR800 dataloggers do not support

operation of the CDM-VW300 in 200 and 333.3 Hz modes.

NOTE

CDM_VW300Dynamic() captures dynamic readings from sensors. It is used

in the main scan of the CRBasic program.

CDM_VW300Dynamic(CPIAddress, DestFreq, DestDiag)

1 2 ... 52 53 54 55 56 57 58 59 60 61 62 ... 121 122

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Campbell CDM-VW300 Series Manuál Strana 57