Embedded standard CAN arbitration worksheet calculator

Calculate arbitration order and completion times and maximum blocking before last winner with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use arbitration order and completion times and maximum blocking before last winner to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Simultaneous standard-data frames [11-bit identifier,encoded total bits]
[[32,120],[5,100],[100,90]]
Bitrate (bits/s)
500000
Arbitration order and completion times
[[5,0.0002],[32,0.00044],[100,0.00062]]
Maximum blocking before last winner (seconds)
0.00044

Try another scenario

Simultaneous standard-data frames [11-bit identifier,encoded total bits]
[[32,120],[5,100],[100,90]]
Bitrate (bits/s)
250000
Arbitration order and completion times
[[5,0.0004],[32,0.00088],[100,0.00124]]
Maximum blocking before last winner (seconds)
0.00088
Calculation method

Calculation method

Arbitration order and completion times

Lower unique 11-bit ID wins; nonpreemptive standard data frames start together at idle bus.

Maximum blocking before last winner (seconds)

Sum frame durations preceding final frame.

Symbols and units
a
Simultaneous standard-data frames [11-bit identifier,encoded total bits]
b
Bitrate (bits/s)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Supported arbitration worksheet: distinct standard 11-bit classic CAN data identifiers, all ready at bus idle. Extended-ID, remote-frame and error arbitration are outside this explicit model. Quantities are deterministic calculations from supplied observations and assumptions; no external data is fetched. Supported limits: Finite inputs only; numeric fields bounded as labelled. Lists and JSON records are limited to 256 entries unless a stricter tool bound is stated. No automatic design approval, legal conclusion, treatment recommendation or safety certification. Bitrate (bits/s): minimum 1e-12, maximum 1000000000000.0.
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