Abstract: In a network coupling redundant controllers to a control system, an electronic device is provided. The device comprises a first interface coupled to the control system addressed using a unique medium access control (MAC) address, a second interface coupled to a first redundant controller, and a third interface coupled to a second redundant controller. The device receives a first message via the first interface and transmits the first message via the second interface and via the third interface. The device receives a second message via the second interface and transmits the second message via the first interface. The device receives a third message via the third interface and transmits the third message via the first interface.

Abstract: In a network coupling redundant controllers to a control system, an electronic device is provided. The device comprises a first interface coupled to the control system addressed using a unique medium access control (MAC) address, a second interface coupled to a first redundant controller, and a third interface coupled to a second redundant controller. The device receives a first message via the first interface and transmits the first message via the second interface and via the third interface. The device receives a second message via the second interface and transmits the second message via the first interface. The device receives a third message via the third interface and transmits the third message via the first interface.

Abstract: In a network coupling redundant controllers to a control system, an electronic device is provided. The device comprises a first interface coupled to the control system addressed using a unique medium access control (MAC) address, a second interface coupled to a first redundant controller, and a third interface coupled to a second redundant controller. The device receives a first message via the first interface and transmits the first message via the second interface and via the third interface. The device receives a second message via the second interface and transmits the second message via the first interface. The device receives a third message via the third interface and transmits the third message via the first interface.

Abstract: A dual redundant process controller is provided. The controller comprises a process control application that executes on a first and a second module. When executed by the first module, a first application instance writes a first synchronization information to the second module, reads a second synchronization information from the first module, and, when the second disagrees with the first synchronization information after passage of a time-out interval, performs a resynchronization function; and wherein, when executed by the second module, the second application instance writes the second synchronization information to the first module, reads the first synchronization information from the second module, and, when the first disagrees with the second synchronization information after passage of the time-out interval, performs the resynchronization function.

Abstract: A dual redundant process controller is provided. The controller comprises a process control application that executes on a first and a second module. When executed by the first module, a first application instance writes a first synchronization information to the second module, reads a second synchronization information from the first module, and, when the second disagrees with the first synchronization information after passage of a time-out interval, performs a resynchronization function; and wherein, when executed by the second module, the second application instance writes the second synchronization information to the first module, reads the first synchronization information from the second module, and, when the first disagrees with the second synchronization information after passage of the time-out interval, performs the resynchronization function.

Abstract: A dual redundant process controller is provided. The controller comprises a process control application that executes on a first and a second module. When executed by the first module, a first application instance writes a first synchronization information to the second module, reads a second synchronization information from the first module, and, when the second disagrees with the first synchronization information after passage of a time-out interval, performs a resynchronization function; and wherein, when executed by the second module, the second application instance writes the second synchronization information to the first module, reads the first synchronization information from the second module, and, when the first disagrees with the second synchronization information after passage of the time-out interval, performs the resynchronization function.

Abstract: A dual redundant process controller is provided. The controller comprises a first processor, memory, and instance of a process control application stored in the first memory. The controller further comprises a second processor, memory, and instance of the process control application stored in the second memory.

Abstract: A dual redundant process controller is provided. The controller comprises a first processor, memory, and instance of a process control application stored in the first memory. The controller further comprises a second processor, memory, and instance of the process control application stored in the second memory.

Abstract: A dual redundant process controller is provided. The controller comprises a first processor, memory, and instance of a process control application stored in the first memory. The controller further comprises a second processor, memory, and instance of the process control application stored in the second memory.

Abstract: In a network coupling redundant controllers to a control system, an electronic device is provided. The device comprises a first interface coupled to the control system addressed using a unique medium access control (MAC) address, a second interface coupled to a first redundant controller, and a third interface coupled to a second redundant controller. The device receives a first message via the first interface and transmits the first message via the second interface and via the third interface. The device receives a second message via the second interface and transmits the second message via the first interface. The device receives a third message via the third interface and transmits the third message via the first interface.

Abstract: A dual redundant process controller is provided. The controller comprises a first processor, memory, and instance of a process control application stored in the first memory. The controller further comprises a second processor, memory, and instance of the process control application stored in the second memory.

Abstract: A dual redundant process controller is provided. The controller comprises a process control application that executes on a first and a second module. When executed by the first module, a first application instance writes a first synchronization information to the second module, reads a second synchronization information from the first module, and, when the second disagrees with the first synchronization information after passage of a time-out interval, performs a resynchronization function; and wherein, when executed by the second module, the second application instance writes the second synchronization information to the first module, reads the first synchronization information from the second module, and, when the first disagrees with the second synchronization information after passage of the time-out interval, performs the resynchronization function.

Abstract: A fault router method and system for use in a parallel redundant network environment provide additional safeguards over traditional redundant networks. Where multiple connection faults on multiple machines would ordinarily stifle communications between two or more network entities, the fault router passes packets between redundant networks to bypass connection faults. Compatibility and timing improvements allow for the extension of the parallel network environment, and provide for time-synchronized network operation.

Abstract: A fault router method and system for use in a parallel redundant network environment provide additional safeguards over traditional redundant networks. Where multiple connection faults on multiple machines would ordinarily stifle communications between two or more network entities, the fault router passes packets between redundant networks to bypass connection faults. Compatibility and timing improvements allow for the extension of the parallel network environment, and provide for time-synchronized network operation.

Abstract: Schemes for synchronizing networked stations using data messages and hardware pulses are described herein. In one embodiment, a method to provide time data from a first processor to at least one second processor may include transmitting a data message from the first processor to the at least one second processor, in which the data message associates a hardware pulse with a future time, and transmitting a hardware pulse from the first processor to the at least one second processor at the future time.

Abstract: A fault router method and system for use in a parallel redundant network environment provide additional safeguards over traditional redundant networks. Where multiple connection faults on multiple machines would ordinarily stifle communications between two or more network entities, the fault router passes packets between redundant networks to bypass connection faults. Compatibility and timing improvements allow for the extension of the parallel network environment, and provide for time-synchronized network operation.

Abstract: Schemes for synchronizing networked stations using data messages and hardware pulses are described herein. In one embodiment, a method to provide time data from a first processor to at least one second processor may include transmitting a data message from the first processor to the at least one second processor, in which the data message associates a hardware pulse with a future time, and transmitting a hardware pulse from the first processor to the at least one second processor at the future time.

Abstract: A fault router method and system for use in a parallel redundant network environment provide additional safeguards over traditional redundant networks. Where multiple connection faults on multiple machines would ordinarily stifle communications between two or more network entities, the fault router passes packets between redundant networks to bypass connection faults. Compatibility and timing improvements allow for the extension of the parallel network environment, and provide for time-synchronized network operation.