CR200/CR200X Series Dataloggers - Campbell Scientific

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Section 15. Alternate Telecoms Resource Library 15.1.2.1 Glossary of Terms Coils (00001 to 09999) Originally, "coils" referred to relay coils. In CR200(X)s, coils are exclusively ports, flags, or a Boolean variable array. Ports are inferred if parameter 5 of the ModbusSlave instruction is set to 0. Coils are assigned to Modbus registers 00001 to 09999. Digital Registers 10001-19999 Hold values resulting from a digital measurement. Digital registers in the Modbus domain are read only. In the CSI domain, the leading digit in Modbus registers is ignored, and so are assigned together to a single Dim or Public variable array (read / write). Input Registers 30001 - 39999 Hold values resulting from an analog measurement. Input registers in the Modbus domain are read only. In the CSI domain, the leading digit in Modbus registers is ignored, and so are assigned together to a single Dim or Public variable array (read / write). Holding Registers 40001 - 49999 Hold values resulting from a programming action. Holding registers in the Modbus domain are read / write. In the CSI domain, the leading digit in Modbus registers is ignored, and so are assigned together to a single Dim or Public variable array (read / write). RTU / PLC Remote Telemetry Units (RTUs) and Programmable Logic Controllers (PLCs) were at one time used in exclusive applications. As technology increases, however, the distinction between RTUs and PLCs becomes more blurred. A CR200(X) fits both RTU and PLC definitions. 15.1.3 Programming for Modbus 15.1.3.1 Declarations TABLE. CRBASIC Ports, Flags, Variables and Modbus Registers (p. 141) shows the linkage between CR200(X) ports, flags and Boolean variables and Modbus registers. Modbus does not distinguish between CR200(X) ports, flags, or Boolean variables. By declaring only ports, or flags, or Boolean variables, the declared feature is addressed by default. A typical CRBASIC program for a Modbus application will declare variables and ports, or variables and flags, or variables and Boolean variables. 140
Section 15. Alternate Telecoms Resource Library Table 20. CRBASIC Ports, Flags, Variables and Modbus Registers CR200(X) Feature Example CRBASIC Declaration Equivalent Example Modbus Register Control Port (Port) Public Port(8) 00001 to 00009 Flag Public Flag(17) 00001 to 00018 Boolean Variable Public ArrayB(56) as Boolean 00001 to 00057 Variable Public ArrayV(20)* 40001 to 40041* or 30001 to 30041* *Because of byte number differences, each CR200(X) domain variable translates to two Modbus domain input / holding registers. 15.1.3.2 CRBASIC Instructions - Modbus Complete descriptions and options of commands are available in CRBASIC Editor Help. ModbusMaster () Sets up a CR200(X) as a Modbus master to send or retrieve data from a Modbus slave. Syntax ModbusMaster (ResultCode, ComPort, BaudRate, ModbusAddr, Function, Variable, Start, Length, Tries, TimeOut) ModbusSlave () Sets up a CR200(X) as a Modbus slave device. Syntax ModbusSlave (ComPort, BaudRate, ModbusAddr, DataVariable, BooleanVariable) 15.1.3.3 Addressing (ModbusAddr) Modbus devices have a unique address in each network. Addresses range from 1 to 247. Address 0 is reserved for universal broadcasts. When using the NL100, use the same number as the Modbus and PakBus® address. 15.1.3.4 Supported Function Codes (Function) Modbus protocol has many function codes. CR200(X) commands support the following. • 01 Read Coil Status • 02 Read Input Status • 03 Read Holding Registers • 04 Read Input Registers 141
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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 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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Section 3. Overview Advantages of P
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Section 3. Overview Table 3. Intern
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Section 3. Overview 36
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Section 4. Sensor Support 4.1.3 Swi
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Section 4. Sensor Support Figure 27
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Section 4. Sensor Support 4.3.1 Mea
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Section 4. Sensor Support FIGURE. P
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Section 4. Sensor Support 4.6 SDI-1
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Section 4. Sensor Support 48
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Section 5. Measurement and Control
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Section 5. Measurement and Control
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Section 6. CR200(X) Power Supply Au
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Section 7. Grounding 7.1.1 Lightnin
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Section 7. Grounding Examples: •
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Section 8. CR200(X) Configuration F
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Section 8. CR200(X) Configuration T
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Section 8. CR200(X) Configuration 8
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Section 8. CR200(X) Configuration
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Section 8. CR200(X) Configuration 6
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Section 9. Programming in the Logge
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Section 9. Programming 9.5 Structur
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Section 9. Programming Variable nam
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Section 9. Programming CRBASIC EXAM
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Section 9. Programming DataTable ()
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Section 9. Programming Consider the
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Section 9. Programming Scan () dete
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Section 9. Programming 9.9.4 Expres
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Page 106 and 107: Section 10. CRBASIC Programming Ins
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Page 146 and 147: Section 14. PakBus Overview • Rou
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Page 160 and 161: Section 17. Care and Maintenance Fi
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Page 164 and 165: Section 18. Troubleshooting 18.1.1.
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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
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Page 184 and 185: Appendix A. Glossary VAC Volts Alte
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Page 188 and 189: Appendix B. Status Table and Settin
Page 194 and 195: Appendix C. Serial Port Pin Outs 22
Page 196 and 197: Appendix D. ASCII / ANSI Table Dec
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Page 200 and 201: 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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