| 摘要 |
<p>A control system has blocks (30) or other components that facilitate validation of their own replacements, e.g., downloaded via e-commerce transactions (11). The system includes first (30) and second (30a) process control components. The first component is coupled to a third process control component (32), with which it transfers information, e.g., as part of an active or ongoing control process. The second component (30a) can be, for example, an update or other potential replacement for the first component. The first and/or second components can effect substitution of the second component for the first. More particularly, they can effect coupling of the second component for information transfer with the third component and decoupling of the first component from such transfer with the third component. Preferably, such coupling and decoupling occur while the process control system remains active.</p> |
