User`s manual

Logging Data 6-1
December 2003
Chapter 6
Logging Data
A powerful and flexible feature of the TransPort is data logging.
The TransPort enables you to choose from up to six sets of
parameters to log. You can also select the start time and date, end
time and date, and time interval. Logs can run one at a time or
simultaneously. Error and circular logs are also available.
Logged data is internally stored in battery backed up memory.
The TransPort stores logged data in pages, allocating 120 pages
of memory for data logging. Each page can hold up to 120
records. The TransPort assigns each page a header and uses the
header to distinguish one page from another. The header contains
the log name, start time and date, end time and date, log
parameters, and the selected time interval (these parameters are
selected in the Log Menu in the STD option). Each record
contains three parameters, as well as the log name, start and end
times, and the time interval. For example, if you chose to log
velocity, forward totals, and reverse totals every 5 minutes, at
each 5 minute interval the values for the selected parameters
represent one record.
Note: Each log uses at least one page. Pages cannot be shared
by logs.
Since a fixed amount of memory is assigned to data logging, the
frequency of the time interval, the length of the log run, and the
number of logs affect the amount of memory. For example, a log
that records every 5 seconds will use up more memory than a log
that records every 5 minutes for a given amount of time.