Section 2. Data Storage and Retrieval
2-9
When the PC card is inserted in a computer, the data files can be copied to
another drive or used directly from the PC card just as one would from any
other disk. In most cases, however, it will be necessary to convert the file
format before using the data.
2.3.4.3 Converting File Format
The CR5000 stores data on the PC card in TOB2 Format. TOB2 is a binary
format that incorporates features to improve reliability of the PC Cards. TOB2
allows the accurate determination of each record’s time without the space
required for individual time stamps.
When TOB2 files are converted to another format, the number of records may
be greater or less than the number requested in the data table declaration.
There are always at least two additional frames of data allocated. When the
file is converted these will result in additional records if no lapses occurred. If
more lapses occur than were anticipated, there may be fewer records in the file
than were allocated.
PC9000’s file converter will convert TOB1 or TOB2 files to other formats.
The Convert Data Files option is in the File Menu. The options for TOB2
appear after the name of the file to convert has been selected (Figure 2.3-3.)
FIGURE 2.3-3 File Conversion Dialog Box
Содержание CR5000
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