Specifying and Configuring an ODE Solver (Control Design and Simulation Module)

For a given simulation, you specify and configure the ordinary differential equation (ODE) solver by using the Configure Simulation Parameters dialog box. Display this dialog box by double-clicking the Input Node of the Simulation Loop. This dialog box includes the ODE Solver pull-down menu, 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 (s)
• Minimum Step Size (s)
• Maximum Step Size (s)
• Relative Tolerance
• Absolute Tolerance

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