Patent ID: 8732556
Filing Date: 2014-05-20
Classification: G05B,G06F

Abstract:
1. A dual redundant process controller, comprising: a first processor; a first memory; a first instance of a process control application stored in the first memory; a second processor; a second memory; and a second instance of the process control application stored in the second memory, wherein, when executed by the first processor, the first instance of the process control application writes a first synchronization information to the second memory, reads a second synchronization information from the first memory, and, when the second synchronization information disagrees with the first synchronization information after passage of a predetermined time-out interval, performs a resynchronization function; and wherein, when executed by the second processor, the second instance of the process control application writes the second synchronization information to the first memory, reads the first synchronization information from the second memory, and, when the first synchronization information disagrees with the second synchronization information after passage of the predetermined time-out interval, performs the resynchronization function.