CR200/CR200X Series Dataloggers - Campbell Scientific

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Section 9. Programming in the LoggerNet / PC400 datalogger support software suites. Programs can be up to 19.6 KBytes in size although typical programs are smaller. 9.3.1 Short Cut Editor and Program Generator Short Cut is easy-to-use menu-driven software that presents the user with lists of predefined measurement, processing, and control algorithms from which to choose. The user makes choices and Short Cut writes the CRBASIC code required to perform the tasks. Short Cut creates a wiring diagram to simplify connection of sensors and external devices. Quickstart Tutorial (p. 3) works through a measurement example using Short Cut. For many complex applications, Short Cut is still a good place to start. When as much information as possible is entered, Short Cut will create a program template from which to work, already formatted with most of the proper structure, measurement routines, and variables. The program can then be edited further using CRBASIC Program Editor. 9.3.2 CRBASIC Editor CR200(X) application programs are written in a variation of BASIC (Beginner's All-purpose Symbolic Instruction Code) computer language, CRBASIC (Campbell Recorder BASIC). CRBASIC Editor is a text editor that facilitates creation and modification of the ASCII text file that constitutes the CR200(X) application program. CRBASIC Editor is available as part of LoggerNet / PC400 / RTDAQ datalogger support software packages. Fundamental elements of CRBASIC include: • Variables - named packets of CR200(X) memory into which are stored values that normally vary during program execution. Values are typically the result of measurements and processing. Variables are given an alphanumeric name and can be dimensioned into arrays of related data. • Constants - discrete packets of CR200(X) memory into which are stored specific values that do not vary during program executions. Constants are given alphanumeric names and assigned values at the beginning declarations of a CRBASIC program. Note Keywords and predefined constants are reserved for internal CR200(X) use. If a user programmed variable happens to be a keyword or predefined constant, a runtime or compile error will occur. To correct the error, simply change the variable name by adding or deleting one or more letters, numbers, or the underscore (_) from the variable name, then recompile and resend the program. CRBASIC Help provides a list of keywords and pre-defined constants. • Common instructions - Instructions and operators used in most BASIC languages, including program control statements, and logic and mathematical operators. • Special instructions - Instructions unique to CRBASIC, including measurement instructions that access measurement channels, and 70
Section 9. Programming processing instructions that compress many common calculations used in CR200(X) dataloggers. These four elements must be properly placed within the program structure. 9.4 Numerical Formats Four numerical formats are supported by CRBASIC. Most common is the use of base 10 numbers. Scientific notation, binary, and hexadecimal formats may also be used, as shown in TABLE. Formats for Entering Numbers in CRBASIC (p. 71). Only standard base 10 notation is supported by Campbell Scientific hardware and software displays. Table 5. Formats for Entering Numbers in CRBASIC Format Example Base 10 Equivalent Value Standard 6.832 6.832 Scientific notation 5.67E-8 5.67X10 -8 Binary &B1101 11 Hexadecimal &HFF 255 Binary format is useful when loading the status (1 = high, 0 = low) of multiple flags or ports into a single variable, e.g., storing the binary number &B11100000 preserves the status of flags 8 through 1. In this case, flags 1 - 5 are low, 6 - 8 are high. CRBASIC EXAMPLE. Load Binary Information into a Variable (p. 71) shows an algorithm that loads binary status of flags into a LONG integer variable. CRBASIC EXAMPLE 2. Public FlagInt Public Flag(8) Public I Load binary information into a single variable DataTable (FlagOut,True,1000) Sample (1,FlagInt) EndTable BeginProg Scan (1,Sec) FlagInt = 0 For I = 1 To 8 Flag (I) = IIF (Flag(I)= 0,0,-1) If Flag(I) = true then FlagInt = FlagInt + 2 ^ (I - 1) EndIf Next I CallTable FlagOut NextScan EndProg 71
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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 12. Memory and Data Storage
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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 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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