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Specifying and Configuring an ODE Solver (Simulation Module)

LabVIEW 8.5 Simulation Module Help
August 2007

NI Part Number:
371894B-01

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For a given simulation, you specify and configure the ordinary differential equation (ODE) solver by using the Configure Simulation Parameters dialog box. Launch this dialog box by double-clicking the Input Node of the Simulation Loop. This dialog box includes the ODE Solver pull-down list, which you use to specify the ODE solver of a simulation.

Note  If the term (variable) appears next to an ODE solver, that solver has a variable step size. The other ODE solvers have a fixed step size.

Configuring ODE Solver Options

If you specify a variable step-size ODE solver, you can configure the following options:

  • Initial Step Size
  • Minimum Step Size
  • Maximum Step Size
  • Relative Tolerance
  • Absolute Tolerance

If you specify a fixed step-size ODE solver, you can configure only the Step Size option.

Note  If you are running a simulation on a real-time or embedded target, National Instruments recommends you specify a fixed step-size ODE solver.

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