| 摘要 |
<p>A tandemized data processing system has a first and a second programmed logic controller and centralized governance for alternatively governing one controller in a master state, whilst allowing the other controller in a standby state. Each controller has a local powering facility and a local bus, and furthermore is attached via a respective bus interface element to a general bus provided with input/output subsystems. The system further has a high-speed serial link between the two controllers. In particular, each local bus has local communication facilities, for consistently enabling user interaction with the master controller.</p> |
