A control system has blocks or other components that facilitate validation of their own replacements, e.g., downloaded via e-commerce transactions. The system includes first and second process control components. The first component is coupled to a third process control component, with which it transfers...http://www.google.de/patents/US6501995?utm_source=gb-gplus-sharePatent US6501995 - Process control system and method with improved distribution, installation and validation of components
