DataSecurity

For every output PI Point the interface instance services, the access control list in the datasecurity attribute must grant read access to the PI Identity in the PI trust that authenticates the interface instance. If no output PI Points are used, no read access is required in the datasecurity attribute.

• If the interface is used without a buffering application, write access must be granted.

• If the interface is used with a buffering application, the buffering application requires write access but the interface does not.

  Note: When buffering is configured, the datasecurity attribute must permit write access for the buffering application's PI trust or mapping. The datasecurity write permission for the interface's PI trust is required only when buffering is not configured.