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Logging Formats

Last updated: 2014-12-01

Logging files will be written in Logging Blocks, exported from Analyze Blocks or can be a result of a file conversation. These logging files can then be read in Replay Blocks or as offline source files. 

loggingformat.png

CANoe and CANalyzer support two types of logging formats: message-based and signal-based.

Message-based
A message-based format will store the traffic of bus systems and additional information about the bus communication. In general all bus events (messages) will be logged together with other information like statistics or even disturbances of the bus traffic. These logging files can be easily used for offline analyze of network traffic or for replay on the bus with CANoe.  

Signal-based
A signal-based format will store signal values that were extracted from messages transferred over the network. All information about the message itself and additional information about the network and communication will be lost. To log a signal-based file a description (database) for decoding the signal values has to be provided. Signal-based files cannot be directly replayed on the bus but can be easily used for signal analyze in CANoe, CANape or third party tools. 

ASCII Logging Files (.ASC)

  • Message-based format for reading and writing
  • Standard ASCII representation
  • Used for data exchange with third party programs or to include trace data in documents
  • Supports messages of all bus systems, system variables, environment variables, internal events, markers and comments
Note:

ASCII is not recommended at high data rates due to its poorer performance. BLF and MDF format are much better suited for this.

BLF Logging File (BLF)

  • Message-based format for reading and writing
  • Binary Logging Format (binary format)
  • Stores the data in binary format in a very efficient way in terms of file size and read/write performance
  • Supports messages of all bus systems, system variables, environment variables, internal events, markers and comments
  • BLF is recommended for all new loggings

MDF Logging files (MF4, MDF)

  • Message-based and Signal-based format for reading and writing
  • Measurement Data Format (binary format)
  • ASAM Standard Format
  • Stores the data in binary format in a very efficient way in terms of file size and read/write performance. 
  • Supports CAN, LIN, FlexRay and Ethernet in standard ASAM format. All other bus systems, system variables, environment variables, internal events are supported in a Vector specific extension.
  • MDF is recommended for external data exchange or analyze with third party tools and is in some configurations more efficient than BLF.
 
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2014-12-01
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