Analyse ASC and BLF logs

Open a recording

Select Log Analyzer on the home screen, then use Open Log to choose an ASC or BLF recording. Keep the DBC definitions for that recording available for mapping.

v2.0.5 supports recorded ASC and BLF files. Log encoding and signal export are not included in this release.

Map the DBC files

1. Add the DBC definitions required for the recording.
2. Check which recorded channels the definitions belong to and configure the channel mapping for your session.
3. Review decoded frames to check that the definitions match the traffic.

A recording can contain several channels or database revisions. Match the definitions to the source traffic before interpreting a decoded value.

Inspect the trace

Switch between chronological All frames and Per message, which shows the latest frame for each message. Use trace filters to narrow the traffic and compare changed bytes with the previous frame of the same ID.

Review Unknown IDs to find traffic without a matching definition. Inspect which payload bits change, try a decode, and save a useful trial as a DBC signal. Use Refresh mapping after changing the loaded DBC definitions.

Plot signals and review statistics

Select the decoded signals relevant to your investigation and add them to a plot. Use overlay or stacked lanes, step or linear lines, per-signal scaling, the overview strip, and A/B cursors to measure time and values. Selecting a plotted signal opens its message in the inspector at the cursor.

Run Check to review cycle time, DLC, and values outside the signal range defined by the DBC. Recording problems also appear in the Problems list.

The DBC definition determines how a raw payload becomes a physical value. If a value looks wrong, inspect the signal's start bit, length, byte order, scale, and offset in the viewer.

Configure the session

Use channel mapping and analysis settings when working with multiple sources. A DBC can be removed from the session without deleting its file. Log Analyzer preserves its session state when you switch to another work tab and return.

Replay advances the trace and plots like a live capture. Pause keeps the current replay view; Stop / reset restores the view that was active before replay started.

Analysis runs locally. Internet access is still needed for licensing, app downloads, and updates as described in the license documentation.

If frames remain undecoded

• Check that the recording is an ASC or BLF file supported by this release.
• Check the channel mapping and the frame IDs covered by each DBC.
• Inspect Unknown IDs for missing definitions.
• Compare the recording's expected database revision with the file you supplied.

Continue with DBC inspection or comparison of database revisions.