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Data Logging
The logger utilizes a standard SD card up to 16GB. The logger looks for the presence of an SD Card at
start up. If one isn’t present the
File System LED
will blink orange to indicate that it’s waiting for an SD
card. An SD card can be inserted at any time and the
File System LED
will change to reflect the new
status.
By default the logger is configured to log all data using a baud rate of 250K. A configuration file can be
used to change the baud rate or filter the CAN data. See the
Configuration File
section for more details.
Closing a log session
The logger utilizes the
keyswitch pin
to determine when to start and stop. The key switch indicates to
the logger that it is safe to close the session file. The logger keeps itself powered while it closes the
session and then allows itself to shut down.
The
User Action
button can also be used to close a session and initiate a new session. Simply hold the
User Action button until the File System LED turns off. Then hold it again until the LED turns or blinks
green to initiate a new session.
Log Files
The logger has two type of logging mechanisms which are described below.
Standard
The system creates log files using utilizes the loggers date and time. The date serves as the main folder
and the time serves as the file name within the folder. The logger will continue to run until there isn’t
any space available for creating new files. The result is that all data is maintained until removed from
the SD card. This is an ideal mechanism for an engineering environment.
Circular
This mode utilizes a total of five files named LOG_001.MEL through LOG_005.MEL. At startup the logger
will rename LOG_004.MEL to LOG_005.MEL, LOG_003.MEL to LOG_004.MEL, LOG_002.MEL to
LOG_003.MEL, and finally, LOG_001.MEL to LOG_002.MEL. It will then utilize LOG_001.MEL for the
active session. The result is a circular mechanism and is ideal for production environments.