Campbell CR800 Series, Руководство оператора

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Section 8. Operation
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Record Element 1 – Timestamp
Data without timestamps are usually meaningless. Nevertheless, the
TableFile() instruction optionally includes timestamps in some formats.
Record Element 2 – Record Number
Record numbers are optionally provided in some formats as a means to
ensure data integrity and provide an up-count data field for graphing
operations. The maximum record number is &hffffffff (a 32-bit number),
then the record number sequence restarts at zero. The CR800 reports back to
the datalogger support software 31 bits, or a maximum of &h7fffffff, then it
restarts at 0. For example, if the record number increments once a second,
restart at zero will occur about once every 68 years (yes, years).
8.8.3 Resetting the CR800
A reset is referred to as a "memory reset." Be sure to backup the current CR800
configuration before a reset in case you need to revert to the old settings.
The following features are available for complete or selective reset of CR800
memory:
•
Full memory reset
•
Program send reset
• Manual data-table reset
•
Formatting memory drives
8.8.3.1 Full Memory Reset
Full memory reset occurs when an operating system is sent to the CR800 using
DevConfig or when entering 98765 in the Status table field FullMemReset
(p. 541).
A full memory reset does the following:
•
Clears and formats CPU: drive (all program files erased)
• Clears SRAM data tables
•
Clears Status -table elements
•
Restores settings to default
• Initializes system variables
• Clears communication memory