Data log file names

When the system starts new log files, it names them according to the date and the type of data they contain. File sets are created in sets of three.
The long format for the file name is
YYYY MM DD NNNN <log file identifier string> <(type)>
.dat
 where:
  • YYYY
    is the year
  • MM
    is the month
  • DD
    is the day
  • NNNN
    is the sequential file identifier. This number indicates the sequence files were created in. You can have up to 9999 file sets per day. At midnight, the sequence starts at 0000 again.
  • <
    log file identifier string
    > is a text string you can specify to help identify the log file. The maximum string length is 20 characters.
  • <(
    type
    )> is the file type. Note that the type is enclosed in parentheses. File sets contain three file types: Tagname, Float (for analog and digital values), and String.
The short form (8 characters) for the file name is YYMMDDnz.dbf, where:
  • YY
    is the year
  • MM
    is the month
  • DD
    is the day
  • n
     is the sequential file letter (
    a
     for the first,
    b
     for the second, and so on) indicates the sequence files were created in. You can have up to 26 file sets per day. At midnight, the sequence starts at
    a
     again.
  • <
    log file identifier string
    > is a text string you can specify to help identify the log file. The maximum string length is 20 characters.
  • z
     is the file type:
    t
     for tag name,
    f
     for floating point (analog and digital tag), and
    s
     for string.
If you are using short file names you can have up to 26 file sets per day. If you are in the 26th set, no new file set will be started even when the
DataLogSnapshot
command is issued. In this instance, logging will continue to the same file.
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