Campbell Scientific CR3000 CR3000 Micrologger - Page 115

Section 7. Installation channels, and processing instructions that compress many common calculations used in CR3000 dataloggers. These four elements must be properly placed within the program structure. 7.7.1.2.1 Inserting Comments into Program Comments are non-executable text placed within the body of a program to document or clarify program algorithms. As shown in CRBasic example Inserting Comments (p. 115), comments are inserted into a program by preceding the comment with a single quote ('). Comments can be entered either as independent lines or following CR3000 code. When the CR3000 compiler sees a single quote ('), it ignores the rest of the line. CRBasic Example 4. Inserting Comments 'Declaration of variables starts here. Public Start(6) 'Declare the start time array 7.7.2 Sending Programs The CR3000 requires that a CRBasic program file be sent to its memory to direct measurement, processing, and data-storage operations. The program file can have the extension cr3 or .dld and can be compressed using the GZip algorithm before sending it to the CR3000. Upon receipt of the file, the CR3000 automatically decompresses the file and uses it just as any other program file. See the appendix Program and OS Compression for more information. Programs are sent with: • Program Send command in datalogger-support software (p. 76) • Program send command in Device Configuration Utility (DevConfig (p. 97)) • CF card (CRD: drive) or Campbell Scientific mass-storage media (USB: drive) A good practice is to always retrieve data from the CR3000 before sending a program; otherwise, data may be lost. Read More! See File Management (p. 346) and the CF card (CRD: drive) or Campbell Scientific mass-storage media (USB: drive) documentation available at www.campbellsci.com. 7.7.2.1 Preserving Data at Program Send When sending programs to the CR3000 through the software options listed in table Program Send Options that Reset Memory (p. 116), memory is reset and data are erased. When data retention is desired, send programs using the File Control Send (p. 456) command or CRBasic Editor command Compile, Save, Send in the Compile menu. The window shown in figure CRBasic Editor Program Send File Control Window (p. 116) is displayed before the program is sent. Select Run Now, Run On Power-up, and Preserve data if no table changed before pressing Send Program. 115