The Control State () node is an attribute node that handles settings for state variables that are acting as control variables. Control (state) variables have a special status when using the Sensitivity or Optimization solver. Each control state has a separate Control State node. This attribute is used together with the Dependent Variables node.

The State Components section displays the variable names for the states components.

Use the Solve for this state check box to control whether to use this variable when solving a Sensitivity or Optimization problem. For other parts of the solution process, the control variables are held fixed. This setting is only available if the Dependent Variables node’s setting Defined by study step is set to User defined. If the variable is not solved for its value is determined by the settings in the Values of Variables Not Solved For section of the corresponding Dependent Variables node.

Use the Store in output check box to control whether to store the variable in any output solution or not.