Model callback fuctions simulink

Creating Model Callback Functions

You can create model callback functions interactively or programmatically.Use theCallbacks pane of the model'sModel Properties dialog box (see Callbacks Pane) to create model callbacks interactively. Tocreate a callback programmatically, use theset_param commandto assign a MATLAB expression that implements the function tothe model parameter corresponding to the callback (seeModel Callback Functions).

For example, this command evaluates the variable testvar whenthe user double-clicks the Test block inmymodel:

set_param('mymodel/Test', 'OpenFcn', testvar)

You can examine the clutch system (sldemo_clutch.mdl)for routines associated with many model callbacks. This model definesthe following callbacks:

• PreLoadFcn

• PostLoadFcn

• StartFcn

• StopFcn

• CloseFcn

Model Callback Functions

The following table describes callback functions associatedwith models.

Parameter	When Executed
CloseFcn	Before the block diagram is closed. Any ModelCloseFcn and DeleteFcn callbacksset on blocks in the model are called prior to the model'sCloseFcn.The DestroyFcn callback of any blocks in the modelis called after the model'sCloseFcn.
ContinueFcn	Before the simulation continues.
InitFcn	Called at start of model simulation.
PauseFcn	After the simulation pauses.
PostLoadFcn	After the model is loaded. Defining a callback routinefor this parameter might be useful for generating an interface thatrequires that the model has already been loaded. Note  If you make structural changes with PostLoadFcn,the function does not set the modelDirty flagto indicate unsaved changes. You can close the model without beingprompted to save.
PostSaveFcn	After the model is saved.
PreLoadFcn	Before the model is loaded. Defining a callback routinefor this parameter might be useful for loading variables used by themodel. Note   In a PreLoadFcn callback routine, the get_param command does not return themodel's parameter values because the model is not yet loaded. In a PreLoadFcn routine, get_param returns: The default value for a standard model parameter suchas solver An error message for a model parameter added with add_param In a PostLoadFcn callback routine,however, get_param returns the model's parametervalues because the model is loaded.
PreSaveFcn	Before the model is saved.
StartFcn	Before the simulation starts.
StopFcn	After the simulation stops. Output is written to workspacevariables and files before theStopFcn is executed.