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Solver

hisl_0040: Configuration Parameters > Solver > Simulation time

ID: Titlehisl_0040: Configuration Parameters > Solver > Simulation time
Description

For models used to develop high-integrity systems, in the Configuration Parameters dialog box, on the Solver pane, set parameters for simulation time as follows:

A

Start time to 0.0.

B

Stop time to a positive value that is less than the value of Application lifespan (days).

Note

Simulink® allows nonzero start times for simulation. However, production code generation requires a zero start time.

By default, Application lifespan (days) is inf. If you do not change this setting, any positive value for Stop time is valid.

You specify Stop time in seconds and Application lifespan (days) is in days.

RationaleAGenerate code that is valid for production code generation.
References
  • IEC 61508-3, Table A.3 (3) 'Language subset'

  • ISO 26262-6, Table 1 (b) 'Use of language subsets'

  • EN 50128, Table A.4 (11) 'Language Subset'

See Also
Last ChangedR2013b

hisl_0041: Configuration Parameters > Solver > Solver options

ID: Titlehisl_0041: Configuration Parameters > Solver > Solver options
Description

For models used to develop high-integrity systems, in the Configuration Parameters dialog box, on the Solver pane, set parameters for solvers as follows:

A

Type to Fixed-step.

B

Solver to discrete (no continuous states).

Note

Generating code for production requires a fixed-step, discrete solver.

RationaleA, BGenerate code that is valid for production code generation.
References
  • IEC 61508-3, Table A.3 (3) 'Language subset'

  • ISO 26262-6, Table 1 (b) 'Use of language subsets'

  • EN 50128, Table A.4 (11) 'Language Subset'

See AlsoSolver Pane in the Simulink documentation
Last ChangedR2013b

hisl_0042: Configuration Parameters > Solver > Tasking and sample time options

ID: Titlehisl_0042: Configuration Parameters > Solver > Tasking and sample time options
Description

For models used to develop high-integrity systems, in the Configuration Parameters dialog box, on the Solver pane, set parameters for tasking and sample time as follows:

A

Periodic sample time constraint to Specified and assign values to Sample time properties.

    Caution   If you use a referenced model as a reusable function, set Periodic sample time constraint to Ensure sample time independent.

B

Tasking mode for periodic sample times to SingleTasking or MultiTasking.

C

Clear the parameter Automatically handle data transfers between tasks.

Notes

Selecting the Automatically handle data transfers between tasks check box might result in inserting rate transition code without a corresponding model construct. This might impede establishing full traceability or showing that unintended functions are not introduced.

You can select or clear the Higher priority value indicates higher task priority check box . Selecting this check box determines whether the priority for Sample time properties uses the lowest values as highest priority, or the highest values as highest priority.

RationaleA, B, CSupport fully specified models and unambiguous code.
References
  • IEC 61508-3, Table A.3 (3) 'Language subset'

  • ISO 26262-6, Table 1 (b) 'Use of language subsets'

  • EN 50128, Table A.4 (11) 'Language Subset'

  • DO-331, Section MB.6.3.4.e 'Source code is traceable to low-level requirements'

See AlsoSolver Pane in the Simulink documentation
Last ChangedR2013b

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