Simulink Identifier

A Simulink Identifier (SID) is a unique identifier automatically assigned to a Simulink block, model annotation, or a Stateflow object within a Stateflow chart. The SID has the following characteristics:

  • Persistent within the lifetime of a Simulink block, model annotation, or Stateflow object.

  • Saved in the model file.

  • If the name of a block or object changes, the SID remains the same.

  • You cannot modify the SID.

The SID format is


  • model_name is the name of the model where the block, annotation, or object resides

  • sid_number is a unique number within the model, assigned by Simulink

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