Keysight EDUX1052G - Interpreting CAN Lister Data

282 Keysight InfiniiVision 1200 X-Series and EDUX1052A/G Oscilloscopes User's Guide
25 CAN Triggering and Serial Decode
Types of Frames • Active error frames are CAN frames in which a CAN node recognizes an error
condition during a data or remote frame and issues an active error flag.
• A partial frame occurs when the oscilloscope detects any error condition during
a frame that is not followed by an active error flag. Partial frames are not
counted.
Counters • The FRAMES counter gives the total number of completed remote, data,
overload, and active error frames.
• The OVLD counter gives the total number of completed overload frames and
their percentage of the total number of frames.
• The ERR counter gives the total number of completed active error frames and
their percentage of the total number of frames.
• The LOAD (bus load) indicator measures the percentage of time the bus is
active. The calculation is done on 330 ms periods, approximately every 400 ms.
Example: If a data frame contains an active error flag, both the FRAMES counter
and the ERR counter will be incremented. If a data frame contains an error that is
not an active error it is considered a partial frame and no counters are
incremented.
Interpreting CAN Lister Data