| 摘要 |
The invention relates to a method for redundantly controlling processes of an automation system comprising at least two controllers (CPU1, CPU2), in which each controller (CPU1, CPU2) consecutively carries out a number (n) of task blocks (t1, t2, tx, ¦, tn), wherein output data (E(t1), E(t2), E(tx), ¦, E(tn)) which can be transmitted for carrying out the task blocks is stored in a number of work regions (A1, A2, Ax,..., An+1, A1´, A2´, Ax´,..., An+1´) exceeding the number of task blocks by one, the work regions containing the respective output data for each of the task blocks, wherein the one additional work region (An+1, An+1'), which is the system work region, contains the output data which can be currently transmitted. A very simple and secure method for synchronous data management and for controlling the redundant controllers is achieved by transferring the respective previously synchronized content from the system work region into the work region during the start of a task block in the redundant controllers, then updating said content while the task block is carried out and, if the updated content is identical in the redundant controllers, then returning said updated content to the system work region again before the next task block is started.
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