Method and Apparatus for Wireless Communications in a Process Control or Monitoring Environment

• US 20120230309A1
• Filed: 03/09/2012
• Published: 09/13/2012
• Est. Priority Date: 03/09/2011
• Status: Active Grant

• Current Assignee: Fisher Controls International LLC (Emerson Electric Company)
• Original Assignee: Fisher Controls International LLC (Emerson Electric Company)
• Inventors: Junk, Kenneth W.
• Granted Patent: US 9,124,999 B2
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: G05B 19/4186 by protocol, e.g. MAP, TOP
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04W 4/50 Service provisioning or reconfiguring
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

A method in a communication device that implements a communication stack to wirelessly communicate with a remote device according to a general purpose wireless communication protocol, where the remote device operates in a process control environment, includes receiving a request from a software module to establish a wireless communication link with the remote device, establishing a direct connection between the software module and the communication stack, where the direct connection is free of intermediate services, and communicating process data between the software module and the remote device in accordance with an industrial automation protocol over the wireless communication link, where the wireless communication link utilizes the general purpose wireless communication protocol.

Claims

1. A method in a communication device that implements a communication stack to wirelessly communicate with a remote device according to a general purpose wireless communication protocol, wherein the remote device operates in a process control environment, the method comprising:

receiving a request from a software application to establish a wireless communication link with the remote device;

establishing a direct connection between the software component and the communication stack, wherein the direct connection is free of intermediate services; and

communicating process data between the software component and the remote device in accordance with an industrial automation protocol over the wireless communication link;

wherein the wireless communication link utilizes the general purpose wireless communication protocol.

2. The method of claim 1, wherein establishing the direct connection between the software component and the communication stack includes creating a network socket.

3. The method of claim 2, wherein creating the network socket is a stream-oriented socket.

4. The method of claim 1, wherein establishing the direct connection includes not opening a virtual serial port to communicate with the communication stack.

5. The method of claim 1, wherein the general purpose wireless communication protocol conforms to a wireless local area network (WLAN) or a wireless personal area network (WPAN) standard.

6. The method of claim 1, wherein the industrial automation protocol supports a plurality of commands specifically defined for exchanging control or diagnostic data in a process control environment.

7. The method of claim 5, wherein the industrial automation protocol is one of HART of Fieldbus.

8. The method of claim 1, further comprising automatically identifying a type of the communication stack in response to receiving the request from the software component, wherein establishing the direct connection between the software component and the communication stack includes establishing the direct connection in accordance with the identified type;

wherein the type identifies at least of a manufacturer and a version of the communication stack.

9. The method of claim 1, wherein the communication stack operates on a wireless communication module, the method further comprising at least one of:

powering on the wireless communication module in response to receiving the request from the software module; and

powering off the wireless communication module in response to detecting that the software module no longer uses the wireless communication link.

10. The method of claim 9, wherein the direct connection is established is established by an Application Programming Interface (API) in a call stack of the software module.

11. The method of claim 1, wherein communicating the process data includes:

receiving one of a plurality of commands associated with the industrial automation protocol; and

partially executing the received one of the plurality of commands so as to emulate a physical link that operates according to the industrial automation protocol.

12. A software module for use in a communication device, the communication device having a memory and a processor, wherein the communication device implements a communication stack to wirelessly communicate with a remote device operating in a process control environment according to a general purpose wireless communication protocol, and wherein the software module is stored in the memory as computer-executable instructions and executed by the processor to:

receive a request from a software application executing in the communication device to establish a wireless communication link with the remote device;

establish a direct connection between the software application and the communication stack, wherein the direct connection is free of intermediate services; and

communicate process data between the software application and the remote device in accordance with an industrial automation protocol over the wireless communication link;

wherein the wireless communication link utilizes the general purpose wireless communication protocol.

13. The software module of claim 12 implemented as dynamic-link library (DLL).

14. The software module of claim 12, wherein the DLL is executed in a call stack of the software application.

15. The software module of claim 12, wherein the DLL implements a plurality of API functions, each corresponding to a respective one of a plurality of commands of the industrial automation protocol.

16. The software module of claim 12, wherein the software module is executed in a call stack of a dedicated service that executes as a process separate from the software application.

17. The software module of claim 12, wherein the direct connection is free of a virtual serial port associated with the communication stack.

18. The software module of claim 12, wherein the direct connection includes a network socket.

19. The software module of claim 12, wherein the general purpose wireless communication protocol conforms to a wireless local area network (WLAN) or a wireless personal area network (WPAN) standard;

and

the industrial automation protocol supports a plurality of commands specifically defined for exchanging control or diagnostic data in a process control environment.

20. A communication device comprising:

a processor;

a wireless communication module configured to establish a wireless communication link between the communication device and a remote device operating in a process control environment, wherein the wireless communication link operates according to a general purpose wireless communication protocol; and

a memory to store computer-executable instructions that include;

a communication stack that implements the general purpose wireless communication protocol; and

a software module executable by the processor and configured to (i) establish a direct connection between the communication stack and a software application executed by the processor in response to a request from the software application, wherein the direct connection is free of intermediate services, and (ii) communicate process data between the software application and the remote device in accordance with an industrial automation protocol over the wireless communication link using the wireless communication link.

21. The communication device of claim 20, wherein the software module is implemented as dynamic-link library (DLL).

22. The communication device of claim 20, wherein the DLL implements a plurality of API functions, each corresponding to a respective one of a plurality of commands of the industrial automation protocol.

23. The communication device of claim 20, wherein the software module is further configured to selectively power on the wireless communication module according to whether the software application is transmitting or receiving process data.

24. The communication device of claim 20, wherein the software application is configured to receive diagnostic data from the remote device, transmit control data to the remote device, or both.

25. The communication device of claim 20, wherein the software module is further configured to automatically identify a type of the communication stack, wherein type identifies at least of a manufacturer and a version of the communication stack.

26. The communication device of claim 20, wherein software module is configured to establish the direct connection free of configuration of a virtual serial port.