Campbell Scientific CR1000KD CR1000 Measurement and Control System - Page 334
TableFile, Retrieve, Setup File Retrieval, FileManage, Delete, Status, File Control, Caution
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Section 8. Operation 8.3.1.1.4 USB: Drive 8.3.1.1.5 CRD: Drive 334 Note Placing an optional USR: size setting in the user program over-rides manual changes to USR: size. When USR: size is changed manually, the user program restarts and the programmed size for USR: takes immediate effect. The USR: drive holds any file type within the constraints of the size of the drive and the limitations on filenames. Files typically stored include image files from cameras (see the appendix Cameras (p. 562) ), certain configuration files, files written for FTP retrieval, HTML files for viewing via web access, and files created with the TableFile() instruction. Files on USR: can be collected using support software Retrieve (p. 454) command, or automatically using the datalogger support software Setup File Retrieval tab functions. Monitor use of available USR: memory to ensure adequate space to store new files. FileManage() command is used within the CR1000 CRBasic program to remove files. Files also can be removed using support software Delete (p. 454) command. Two Status-table registers monitor use and size of the USR: drive. Bytes remaining are indicated in register "USRDriveFree." Total size is indicated in register "USRDriveSize." Memory allocated to USR: drive, less overhead for directory use, is shown in support software File Control (p. 454) window. USB: drive uses Flash memory on a Campbell Scientific mass storage device (see the appendix Mass Storage Devices ). Its primary purpose is the storage of ASCII data files. Measurement data can be stored on USB: as discrete files by using the TableFile() instruction. Table TableFile()-Instruction Data-File Formats (p. 336) describes available data-file formats. Caution When removing mass-storage devices, do so when the LED is not flashing or lit. Campbell Scientific mass-storage devices • should be formatted as FAT32, • connect to the CR1000 via the CS I/O, • must be removed only when inactive, or data corruption may result. CRD: drive uses CompactFlash® (CF) memory cards exclusively. Its primary purpose is the storage of binary data files. See File-System Errors (p. 347) for explanation of error codes associated with CRD: use. Caution When installing or removing card-storage modules, first turn off CR1000 power. Removing a card from the module while the CF card is active can cause data corruption and may damage the card. Always press the removal button to disable the card and wait for the green LED before removing the card or switching off power prior to removal of the card. To prevent losing data, collect data from the CF card before sending a program to the datalogger. When a program is sent to the datalogger all data on the CF card may be erased.