CAN Bus Utilization

CTR Electronics goes through great efforts to make our products efficient on CAN bus bandwidth. This article highlights the average default bus utilization of supported Phoenix 6 devices. Users should keep total CAN bus utilization below 90% to prevent any unexpected behavior. Information on changing the default CAN update frequency is available in the status signal and control request documentation.

Note

Using Phoenix API will automatically start up a diagnostic server which adds a constant 0-5% total CAN bus utilization.

Device	Phoenix 5 (CAN 2.0)	Phoenix 6 (CAN 2.0)	Phoenix 5 (CAN FD)	Phoenix 6 (CAN FD) [1]
Talon FX	4.7%	4.1%	2.0%	1.8%
CANcoder	1.8%	1.7%	0.9%	0.9%
Pigeon 2	5.5%	3.1%	2.5%	1.3%

[1]

Phoenix 6 devices on CAN FD also increase the default update frequency of many status signals to 100 Hz.