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4.2 The flow of data and memory behaviour
4.2
The flow of data and memory behaviour
Tachograph cards
Display
Download
interface
Printer
Fig. 4 - 1:
The flow of data and memory behaviour, schematic diagram
4.2.1 Working memory
4 - 4
Working memory
•
Recording and
processing of the
distance pulses
•
Saving of card data
•
...
The working memory is used for temporary intermediate storage of
all recorded and processed data.
The following procedures are processed in the working memory:
•
Preparation and transferring of all recorded and legally stipu-
lated data for archiving in the data memory.
•
Preparation and outputting of the requested data over the
display, download interface, or printer.
•
Saving of data that is read in from an inserted tachograph card
for the time period of usage.
•
Transfer of the updated data to the tachograph card and
deletion of the data from the working memory (when requested
by a tachograph card).
© Siemens VDO Automotive AG
Data handling
Data memory for 365
days
•
Driver activities
•
Instances of vehicle
deployment
•
Speed min. of the last
24 h
•
...
•
Buffer for v-recording
Edition 07/2007
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