CR200/CR200X Series Dataloggers - Campbell Scientific

More documents

Recommendations

Info

Section 9. Programming 9.9.4 Expressions in Parameters Read More! See Expressions (p. 87) for more information on expressions. Many parameters allow the entry of expressions. If an expression is a comparison, it will return -1 if the comparison is true and 0 if it is false (Logical Expressions (p. 88)). CRBASIC EXAMPLE. Use of Expressions in Parameters (p. 86) shows an example of the use of expressions in parameters in the DataTable instruction, where the trigger condition is entered as an expression. Suppose the variable TC is a thermistor temperature: CRBASIC EXAMPLE 13. 'DataTable (Name, TrigVar, Size) DataTable (Temp, TC > 100, 5000) Use of Expressions in Parameters When the trigger is "TC > 100", a TC temperature > 100 will set the trigger to true and data is stored. 9.9.5 Arrays of Multipliers and Offsets A single measurement instruction can measure a series of sensors and apply individual calibration factors to each sensor as shown in CRBASIC EXAMPLE. Use of Arrays as Multipliers and Offsets (p. 86). Storing calibration factors in variable arrays, and placing the array variables in the multiplier and offset parameters of the measurement instruction, makes this possible. The measurement instruction uses repetitions to implement this feature by stepping through the multiplier and offset arrays as it steps through the measurement input channels. If the multiplier and offset are not arrays, the same multiplier and offset are used for each repetition. CRBASIC EXAMPLE 14. Public Pressure(3), Mult(3), Offset(3) DataTable (AvgPress,1,-1) DataInterval (0,60,Min) Average (3,Pressure(),IEEE4,0) EndTable BeginProg 'Calibration Factors: Mult(1)=0.123 : Offset(1)=0.23 Mult(2)=0.115 : Offset(2)=0.234 Mult(3)=0.114 : Offset(3)=0.224 Use of Arrays as Multipliers and Offsets Scan (1,Sec) 'VoltSe instruction using array of multipliers and offsets: VoltSe (Pressure(),3,1,Mult(),Offset()) CallTable AvgPress NextScan EndProg 86
Section 9. Programming Read More! More information is available in CRBASIC Editor Help topic "Multipliers and Offsets with Repetitions". 9.10 Expressions An expression is a series of words, operators, or numbers that produce a value or result. Expressions are evaluated expression from left to right, with deference to precedence rules. Two types of expressions, mathematical and programming, are used in CRBASIC. A useful property of expressions in CRBASIC is that they are equivalent to and often interchangeable with their results. Consider the expressions: x = (z * 1.8) + 32 (a mathematical expression) If x = 23 then y = 5 (programming expression) The variable x can be omitted and the expressions combined and written as: If (z * 1.8 + 32 = 23) then y = 5 Replacing the result with the expression should be done judiciously and with the realization that doing so may make program code more difficult to decipher. 9.10.1 Floating Point Arithmetic Variables and calculations are performed internally in single precision IEEE4 4- byte floating point, a binary format. Floating point arithmetic is common in many electronic computational systems, but it has pitfalls high-level programmers should be aware of. Several sources discuss floating point arithmetic thoroughly. One readily available source is the topic "Floating Point" at Wikipedia.org. In summary, <strong>CR200</strong>(X) programmers should consider at least the following: • Floating point numbers do not perfectly mimic real numbers. • Floating point arithmetic does not perfectly mimic true arithmetic. • Avoid use of equality in conditional statements. Use >= and
Page 1:
OPERATOR’S MANUAL CR200/CR200X Se
Page 4 and 5:
Assistance Products may not be retu
Page 6 and 7:
Table of Contents 4.4 Pulse Count M
Page 8 and 9:
Table of Contents 11.4.3 SDI-12 Pow
Page 10 and 11:
Table of Contents Index ...........
Page 12 and 13:
Table of Contents CRBASIC EXAMPLE 1
Page 14 and 15:
Section 1. Introduction Table 1. CR
Page 16 and 17:
Section 2. Quickstart Tutorial 2.1.
Page 18 and 19:
Page 20 and 21:
Section 2. Quickstart Tutorial Figu
Page 22 and 23:
Page 24 and 25:
Section 2. Quickstart Tutorial Exam
Page 26 and 27:
Section 2. Quickstart Tutorial 2. A
Page 28 and 29:
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Section 2. Quickstart Tutorial 22
Page 36 and 37:
Section 3. Overview Figure 25: Feat
Page 38 and 39:
Section 3. Overview Period Average:
Page 40 and 41:
Section 3. Overview 3.1.3.4 Power T
Page 42 and 43:
Section 3. Overview 3.1.5.1 Firmwar
Page 44 and 45:
Section 3. Overview Advantages of P
Page 46 and 47:
Section 3. Overview Table 3. Intern
Page 48 and 49: Section 3. Overview 36
Page 50 and 51: Section 4. Sensor Support 4.1.3 Swi
Page 52 and 53: Section 4. Sensor Support Figure 27
Page 54 and 55: Section 4. Sensor Support 4.3.1 Mea
Page 56 and 57: Section 4. Sensor Support FIGURE. P
Page 58 and 59: Section 4. Sensor Support 4.6 SDI-1
Page 60 and 61: Section 4. Sensor Support 48
Page 62 and 63: Section 5. Measurement and Control
Page 64 and 65: Section 5. Measurement and Control
Page 66 and 67: Section 6. CR200(X) Power Supply Au
Page 68 and 69: Section 7. Grounding 7.1.1 Lightnin
Page 70 and 71: Section 7. Grounding Examples: •
Page 72 and 73: Section 8. CR200(X) Configuration F
Page 74 and 75: Section 8. CR200(X) Configuration T
Page 76 and 77: Section 8. CR200(X) Configuration 8
Page 78 and 79: Section 8. CR200(X) Configuration
Page 80 and 81: Section 8. CR200(X) Configuration 6
Page 82 and 83: Section 9. Programming in the Logge
Page 84 and 85: Section 9. Programming 9.5 Structur
Page 86 and 87: Section 9. Programming Variable nam
Page 88 and 89: Section 9. Programming CRBASIC EXAM
Page 90 and 91: Section 9. Programming DataTable ()
Page 94 and 95: Section 9. Programming Consider the
Page 96 and 97: Section 9. Programming Scan () dete
Page 102 and 103: Section 9. Programming 9.11 Program
Page 104 and 105: Section 9. Programming 92
Page 106 and 107: Section 10. CRBASIC Programming Ins
Page 122 and 123: Section 11. Programming Resource Li
Page 142 and 143: Section 12. Memory and Data Storage
Page 144 and 145: Section 13. Telecommunications and
Page 146 and 147: Section 14. PakBus Overview • Rou
Page 148 and 149:
Section 14. PakBus Overview 14.4.6
Page 150 and 151:
Section 14. PakBus Overview 14.5.3
Page 152 and 153:
Section 15. Alternate Telecoms Reso
Page 154 and 155:
Section 15. Alternate Telecoms Reso
Page 156 and 157:
Section 16. Support Software 16.4 P
Page 158 and 159:
Section 16. Support Software 146
Page 160 and 161:
Section 17. Care and Maintenance Fi
Page 162 and 163:
Section 17. Care and Maintenance 15
Page 164 and 165:
Section 18. Troubleshooting 18.1.1.
Page 166 and 167:
Section 18. Troubleshooting Table 2
Page 168 and 169:
Section 18. Troubleshooting 18.3.3
Page 170 and 171:
Section 18. Troubleshooting 18.3.3.
Page 172 and 173:
Section 18. Troubleshooting 160
Page 174 and 175:
Appendix A. Glossary baud rate sett
Page 176 and 177:
Appendix A. Glossary Earth Ground u
Page 178 and 179:
Appendix A. Glossary modem/terminal
Page 180 and 181:
Appendix A. Glossary period average
Page 182 and 183:
Appendix A. Glossary the table is e
Page 184 and 185:
Appendix A. Glossary VAC Volts Alte
Page 186 and 187:
Appendix A. Glossary 14
Page 188 and 189:
Appendix B. Status Table and Settin
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Appendix C. Serial Port Pin Outs 22
Page 196 and 197:
Appendix D. ASCII / ANSI Table Dec
Page 198 and 199:
Appendix D. ASCII / ANSI Table Dec
Page 200 and 201:
Appendix F. Sensors and Peripherals
Page 202 and 203:
Index Debugging • 151 Declaration
Page 204 and 205:
Index O Offset • 86 Ohm • 6 Ohm
Page 206:
Index U UPS • 11 User Program •
show all

CR200/CR200X Series Dataloggers - Campbell Scientific

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?