SYSTEMS AND METHODS FOR SYNCHRONIZATION OF AN EXTERNAL CONTROL SYSTEM WITH FIELDBUS DEVICES

• US 20110264241A1
• Filed: 04/21/2010
• Published: 10/27/2011
• Est. Priority Date: 04/21/2010
• Status: Active Grant

• Current Assignee: GE Infrastructure Technology, LLC (General Electric Company)
• Original Assignee: General Electric Company
• Inventors: Chong, Justin Brandon, Pettigrew, William Robert
• Granted Patent: US 8,375,237 B2
• Time in Patent Office: Days
• US Class Current: 700/14
• CPC Class Codes: G05B 19/0423 Input/output
• CPC Class Codes: G05B 2219/34413 Add time stamp to command message

Abstract

Systems and methods for synchronization of an external control system with Fieldbus devices are described. A message including timing information for at least one Fieldbus device in direct or indirect communication with a controller may be received by the controller. Based upon information included in the received message, the controller may determine a start time for a current operation cycle of the at least one Fieldbus device. The controller may then utilize the start time and a duration of the current operation cycle to determine a specific time at which the controller will execute control functionality for the at least one Fieldbus device such that a control message output by the controller will be received by the at least one Fieldbus device within the current operation cycle.

Claims

1. A method for synchronizing control of Fieldbus devices, the method comprising:

receiving, by a controller comprising one or more computers, a message comprising timing information for at least one Fieldbus device in direct or indirect communication with the controller;

determining, by the controller and based upon information included in the received message, a start time for a current operation cycle of the at least one Fieldbus device; and

determining, by the controller and based upon the start time and a duration of the current operation cycle, a specific time at which the controller will execute control functionality for the at least one Fieldbus device such that a control message output by the controller will be received by the at least one Fieldbus device within the current operation cycle.

2. The method of claim 1, wherein determining a start time for a current operation cycle comprises:

determining, based upon the information included in the received message, a current operation time of the at least one Fieldbus device; and

determining the start time based upon the current operation time.

3. The method of claim 1, wherein receiving a message comprising timing information comprises receiving the message from a linking device that is configured to facilitate communications between the at least one Fieldbus device and the controller.

4. The method of claim 3, further comprising:

identifying, by the controller, a segment associated with the linking device to which the at least one Fieldbus device is connected,

wherein determining a start time for a current operation cycle comprises determining a start time for a current operation cycle of the identified segment.

5. The method of claim 3, wherein the specific time comprises a first specific time and the segment comprises a first of a plurality of segments associated with the linking device, and further comprising:

identifying, by the controller, a second segment associated with the linking device;

determining, by the controller based upon the information included in the received message, a start time for the current operation cycle of the second segment; and

determining, by the controller and based upon the start time for the second segment and a duration of the current operation cycle of the second segment, a second specific time at which the controller will execute control functionality for one or more Fieldbus devices connected to the second segment.

6. The method of claim 1, further comprising:

accessing, by the controller from an associated memory, information associated with the duration of the current operation cycle.

7. The method of claim 1, further comprising:

receiving, by the controller as one or more inputs, operating information that is output by the at least one Fieldbus device,

wherein the received operating information is utilized by the controller during the execution of the control functionality for the at least one Fieldbus device.

8. The method of claim 1, further comprising:

executing, by the controller, the control functionality for the at least one Fieldbus device; and

outputting, by the controller, at least one control message for communication to the at least one Fieldbus device.

9. A control system comprising:

at least one memory operable to store computer-executable instructions; and

at least one processor configured to access the at least one memory and execute the computer-executable instructions to;

receive a message comprising timing information for at least one Fieldbus device in direct or indirect communication with the processor;

determine, based upon information included in the received message, a start time for a current operation cycle of the at least one Fieldbus device; and

determine, based upon the start time and a duration of the current operation cycle, a specific time at which control functionality for the at least one Fieldbus device will be executed such that a control message output by the at least one processor will be received by the at least one Fieldbus device within the current operation cycle.

10. The control system of claim 9, wherein the at least one processor is configured to determine the start time for the current operation cycle by executing the computer-executable instructions to:

determine, based upon the information included in the received message, a current operation time of the at least one Fieldbus device; and

determine the start time based upon the current operation time.

11. The control system of claim 9, wherein the message is received from a linking device that is configured to facilitate communications between the at least one Fieldbus device and the at least one processor.

12. The control system of claim 11, wherein the at least one processor is further configured to execute the computer-executable instructions to:

identify a segment associated with the linking device to which the at least one Fieldbus device is connected,

wherein the start time comprises a start time for a current operation cycle of the identified segment.

13. The control system of claim 11, wherein the specific time comprises a first specific time, the segment comprises a first of a plurality of segments associated with the linking device, and the at least one processor is further configured to execute the computer-executable instructions to:

identify, a second segment associated with the linking device;

determine, based upon the information included in the received message, a start time for the current operation cycle of the second segment; and

determine, based upon the start time for the second segment and a duration of the current operation cycle of the second segment, a second specific time at which control functionality for one or more Fieldbus devices connected to the second segment will be executed.

14. The control system of claim 9, wherein the at least one processor is further configured to execute the computer-executable instructions to:

access, from an associated memory, information associated with the duration of the current operation cycle.

15. The control system of claim 9, wherein the at least one processor is further configured to execute the computer-executable instructions to:

receive, as one or more inputs, operating information that is output by the at least one Fieldbus device,

wherein the received operating information is utilized during the execution of the control functionality for the at least one Fieldbus device.

16. The control system of claim 9, wherein the at least one processor is further configured to execute the computer-executable instructions to:

execute the control functionality for the at least one Fieldbus device; and

direct the communication of at least one control message to the at least one Fieldbus device.

17. A method for synchronizing control of Fieldbus devices, the method comprising:

receiving, by a controller comprising one or more computers, operating information associated with at least one Fieldbus device in direct or indirect communication with the controller;

identifying, by the controller, information associated with a current operation cycle of the at least one Fieldbus device;

determining, by the controller and based upon the information associated with the current operation cycle, a specific time at which the controller will process the received operating information; and

processing, by the controller upon reaching the determined specific time, the received operating information; and

outputting, by the controller, at least one control message for communication to the at least one Fieldbus device during the current operation cycle.

18. The method of claim 17, wherein identifying information associated with a current operation cycle of the at least one Fieldbus device comprises:

receiving, by the controller, a message comprising timing information for the at least one Fieldbus device; and

determining, by the controller based upon information included in the received message, a start time for the current operation cycle; and

determining the specific time based upon the start time.

19. The method of claim 18, wherein receiving a message comprising timing information comprises receiving the message from a linking device that is configured to facilitate communications between the at least one Fieldbus device and the controller.

20. The method of claim 17, further comprising:

accessing, by the controller from an associated memory, information associated with the duration of the current operation cycle,

wherein determining a specific time at which the controller will process the received operating information comprises determining the specific time based upon the accessed duration information and a start time of the current operation cycle.