CR200/CR200X Series Dataloggers - Campbell Scientific

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Section 9. Programming CRBASIC EXAMPLE 8. 'Declare Variables Public Batt_Volt Public T109_C(2) Definition and Use of a Data Table 'Define Units Units Batt_Volt=Volts Units T109_C(2)=Deg C 'Define Data Tables DataTable (OneMin,True,-1) DataInterval (0,1,Min) Average (1,Batt_Volt,False) Average (2,T109_C(1),False) EndTable DataTable (Table1,True,-1) DataInterval (0,1440,Min) Minimum (1,Batt_Volt,False,False) EndTable 'Main Program BeginProg Scan (5,Sec) 'Default Datalogger Battery Voltage measurement Batt_Volt: Battery (Batt_Volt) NextScan EndProg '109-L Thermistor measurements Temp_C: Therm109(T109_C(),2,1,Ex1,1,0) 'Call Data Tables and Store Data CallTable (OneMin) CallTable (Table1) As shown in CRBASIC EXAMPLE. Definition and Use of a Data Table (p. 79), data table declaration begins with the DataTable () instruction and ends with the EndTable () instruction. Between DataTable () and EndTable () are instructions that define what data to store and under what conditions data are stored. A data table must be called by the CRBASIC program for data storage processing to occur. Typically, data tables are called by the CallTable () instruction once each Scan. 9.7.1.1 DataTable () and EndTable () Instructions The DataTable instruction has three parameters: a user-specified alphanumeric name for the table (e.g., "OneMin"), a trigger condition (e.g., "True"), and the size to make the table in RAM (e.g., auto allocated). • Name-The table name can be any combination of numbers and letters up to 16 characters in length. The first character must be a letter. 80
Section 9. Programming • TrigVar-Controls whether or not data records are written to storage. Data records are written to storage if TrigVar is true and if other conditions, such as DataInterval (), are met. Default setting is -1 (True). TrigVar may be a variable, expression, or constant. TrigVar does not control intermediate processing. Intermediate processing is controlled by the disable variable, DisableVar, which is a parameter in all output processing instructions (see Output Processing Instructions (p. 81)). Read More! TrigVar and DisableVar - Controlling Data Output and Output Processing (p. 125) discusses the use of TrigVar and DisableVar in special applications. • Size-Table size is the number of records to store in a table before new data begins overwriting old data. If "10" is entered, 10 records are stored in the table -- the eleventh record will overwrite the first record. If "-1" is entered, memory for the table is automatically allocated at the time the program compiles. Auto allocation is preferred in most applications since the <strong>CR200</strong>(X) sizes all tables such that they fill (and begin overwriting the oldest data) at about the same time. Approximately 2K bytes of extra data table space is allocated to minimize the possibility of new data over writing the oldest data in ring memory when support software collects the oldest data at the same time new data are written. These extra records are not reported in the Status Table and are not reported to the support software and so are not collected. CRBASIC EXAMPLE. Definition and Use of a Data Table (p. 79) creates a data table named "OneMin", stores data once a minute as defined by DataInterval (), and retains the most recent records in SRAM, up to the automatically allocated memory limit. DataRecordSize entries in the status table report allocated memory in terms of number of records the tables hold. 9.7.1.2 DataInterval () Instruction DataInterval () instructs the <strong>CR200</strong>(X) to write data records at the specified interval. The interval is independent of the Scan () / NextScan interval; however, it must be a multiple of the Scan () / NextScan interval. The data interval must be at least one minute. DataInterval does not override the trigger condition in the DataTable instruction. If the trigger is not set always true by entering a constant, it is a condition that must be met in addition to the time interval before data will be stored. 9.7.1.3 Output Processing Instructions Data storage processing ("output processing") instructions determine what data are stored in the data table. When a data table is called in the CRBASIC program, data storage processing instructions process variables holding current inputs or calculations. If trigger conditions are true, e.g. the required interval has expired, processed values are stored ("output") in the data table. In CRBASIC EXAMPLE. Definition and Use of a Data Table (p. 79), three averages are stored. 81
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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 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 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 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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