CR200/CR200X Series Dataloggers - Campbell Scientific

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Section 9. Programming Consider the Average () instruction as an example of output processing instructions. Average () stores the average of a variable over the data storage output interval. Its parameters are: • Reps-number of elements in the variable array for which to calculate averages. Reps is set to 1 to average Batt_Volt, and set to 2 to average 2 thermistor temperatures, both of which reside in the variable array "T109_C". • Source-variable array to average. Variable arrays Batt_Volt (an array of 1) and T109_C() (an array of 2) are used. • DisableVar-controls whether or not a measurement or value is included in an output processing function. A measurement or value will not be included if the disable variable is true (≠ 0). For example, in the case of an Average () output processing instruction, if, on a particular pass through the data table, the Average () disable variable true, the value resident in the variable to be averaged with not be included in the average. Program CRBASIC EXAMPLE. Use of the Disable Variable has "False" entered for the disable variable, so all readings are included in the averages; the average of variable "Oscillator" does not include samples occurring when Flag 1 is high, producing an average of 2, whereas, when Flag 1 is low (all samples used), an average of 1.5 is calculated. Read More! TrigVar and DisableVar - Controlling Data Output and Output Processing (p. 125) discusses the use of TrigVar and DisableVar in special applications. CRBASIC EXAMPLE 9. 'Declare Variables and Units Public Oscillator Public Flag Public DisableVar Use of the Disable Variable 'Define Data Tables DataTable (OscAvgData,True,-1) DataInterval (0,1,Min) Average (1,Oscillator,DisableVar) EndTable 'Main Program BeginProg Scan (1,Sec) 'Reset and Increment Counter If Oscillator = 2 Then Oscillator = 0 Oscillator = Oscillator + 1 'Process and Control If Oscillator = 1 82
Section 9. Programming NextScan EndProg If Flag = True Then DisableVar = True End If Else DisableVar = False EndIf 'Call Data Tables and Store Data CallTable (OscAvgData) Read More! For a complete list of output processing instructions, see Data Storage Output Processing (p. 94). 9.7.2 Subroutines Subroutines allow a section of code to be called by multiple processes in the main body of a program. Subroutines are defined before the main program body of a program. Program CRBASIC EXAMPLE. Use of a Subroutine p. 83 shows the use of a subroutine to repeatedly perform a calculation. CRBASIC EXAMPLE 10. 'Declare Variables and Units Public Temp(4), I, Temp_F(4) Use of a Subroutine 'Subroutine to convert temperature in degrees C to degrees F Sub ConvertCtoF For I = 1 to 4 Temp_F = Temp(I)*1.8 + 32 Next I EndSub 'Main Program BeginProg Scan (1,Sec) Therm109 (Temp(),4,1,Ex1,1.0,0) 'convert Temperatures to F using Subroutine: Call ConvertCtoF NextScan EndProg 9.8 Program Execution Timing <strong>CR200</strong>(X) programs are built within a Scan () / NextScan structure, with only variable and data table declarations outside the Scan () / NextScan structure. In these programs, Scan () / NextScan creates an infinite loop, each periodic pass through the loop being synchronized to the <strong>CR200</strong>(X) clock. Scan () parameters allow modification of the period. As shown in CRBASIC EXAMPLE. BeginProg / Scan / NextScan / EndProg Syntax (p. 84) , aside from declarations, the CRBASIC program may be relatively short. 83
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OPERATOR’S MANUAL CR200/CR200X Se
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Assistance Products may not be retu
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Table of Contents 4.4 Pulse Count M
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Table of Contents 11.4.3 SDI-12 Pow
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Table of Contents Index ...........
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Table of Contents CRBASIC EXAMPLE 1
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Section 1. Introduction Table 1. CR
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Section 2. Quickstart Tutorial 2.1.
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Section 2. Quickstart Tutorial Figu
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Section 2. Quickstart Tutorial Exam
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Section 2. Quickstart Tutorial 2. A
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Section 2. Quickstart Tutorial 22
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Section 3. Overview Figure 25: Feat
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Section 3. Overview Period Average:
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Section 3. Overview 3.1.3.4 Power T
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Section 3. Overview 3.1.5.1 Firmwar
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Page 62 and 63: Section 5. Measurement and Control
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Page 106 and 107: Section 10. CRBASIC Programming Ins
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Section 13. Telecommunications and
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Section 14. PakBus Overview • Rou
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Section 14. PakBus Overview 14.4.6
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Section 14. PakBus Overview 14.5.3
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Section 15. Alternate Telecoms Reso
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Section 15. Alternate Telecoms Reso
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Section 16. Support Software 16.4 P
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Section 16. Support Software 146
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Section 17. Care and Maintenance Fi
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Section 17. Care and Maintenance 15
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Section 18. Troubleshooting 18.1.1.
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Section 18. Troubleshooting Table 2
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Section 18. Troubleshooting 18.3.3
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Section 18. Troubleshooting 18.3.3.
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Section 18. Troubleshooting 160
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Appendix A. Glossary baud rate sett
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Appendix A. Glossary Earth Ground u
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Appendix A. Glossary modem/terminal
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Appendix A. Glossary period average
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Appendix A. Glossary the table is e
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Appendix A. Glossary VAC Volts Alte
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Appendix A. Glossary 14
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Appendix B. Status Table and Settin
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Appendix C. Serial Port Pin Outs 22
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Appendix D. ASCII / ANSI Table Dec
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Appendix D. ASCII / ANSI Table Dec
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Appendix F. Sensors and Peripherals
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Index Debugging • 151 Declaration
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Index O Offset • 86 Ohm • 6 Ohm
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Index U UPS • 11 User Program •
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CR200/CR200X Series Dataloggers - Campbell Scientific

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