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PROCES-DATA offers the DPI software to
perform the complete Data Acquisition process. Each Datalogger makes
available up to 100 DataCollect channels, which, depending on the
number of channels used and the configured frequency of log samples,
enables many days, weeks or even months of unattended data to be stored.
The Datalogger stores logged data in
Flash memory, the main benefit of using this method being that a PC does
not need to be connected and switched on at all times. The use of a
Datalogger provides a high-level of security for the data that is logged.
Data stored in the Datalogger cannot be manually deleted or altered, and
only the oldest data will start to be overwritten should the memory ever
become full.
DataCollect Channel
A DataCollect Channel provides the
ability to independently configure the means of logging unrelated
measurement variables, with the additional benefits of conditional data
processing and the storage of logged data, without the permanent
requirement for a PC to be operational. The final destination of all data
collected by the DataCollect Channel is a PC hard disc. The PROCES-DATA
Data-Buffer Engine (PDDE), is used to obtain, store and manage the data
collected by the DataCollect Channel, held as an expanding record having a
structure as shown below.
Record
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ID No.
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Date/time
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Value
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Status
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1
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01-04-2005 11.17.10
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25.7
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0
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2
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01-04-2005 11.17.40
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25.9
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0
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n
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Flexible Logging Method
Data Collect channels provide a wide
collection of logging options ranging from the simple regular sample rate,
through to conditional logging based on change of value and/or the state of
another variable, in order to reduce the amount of logged data.
Upload of collected data
Once Visual VIGO is launched, any new
data that has not already been stored on the PC will be automatically
extracted from the DPI and saved on the PC hard disc. As long as Visual
VIGO is run at least once before the newest unsaved data held on the DPI
starts to overwrite the oldest unsaved data, then all stored logged data on
the PC will always be complete.
Related Topics
Downloading Data
Collection DPI Software
Data Collect Configuration
Program
Data Acquisition
Techniques using Visual VIGO
Collecting Remotely
Logged Data
Data Acquisition
and Distribution
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