INTELLIGENT LINKING DEVICE AND METHOD
First Claim
1. A method of interfacing with a plurality of field devices in a process control system having a controller and a user interface communicatively coupled together, a linking device coupled to the controller, and a plurality of field devices communicatively coupled to the linking device via a communication network that uses a standard communication protocol, the method comprising the steps of:
- monitoring substantially all communications on the communication network using the linking device;
selectively processing at least some of the monitored communications in the linking device to obtain first field device information that is associated with at least one of the field devices; and
sending the first field device information to the controller.
1 Assignment
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Accused Products
Abstract
A system and method for interfacing a plurality of field devices which are communicatively coupled on a communication network via a standard communication protocol with a process control system uses a linking device to seamlessly integrate communications between the field devices and a controller within the process control system. The system and method uses the linking device to emulate the communication characteristics of the field devices to link information in field devices with information in a controller of the control system, thereby allowing control loops to include combinations of function blocks from both the field devices and the controller. The linking device uses a link active schedule to monitor substantially all communications on the communication network connecting the field devices and selectively processes and analyzes the monitored communications. The information processed by the linking device, which may include function block information, is automatically routed from a field device to the controller or from the controller to a field device. Other information, such as field device identification information and/or communications diagnostic information, may be collected by the linking device and sent to a user.
78 Citations
45 Claims
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1. A method of interfacing with a plurality of field devices in a process control system having a controller and a user interface communicatively coupled together, a linking device coupled to the controller, and a plurality of field devices communicatively coupled to the linking device via a communication network that uses a standard communication protocol, the method comprising the steps of:
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monitoring substantially all communications on the communication network using the linking device;
selectively processing at least some of the monitored communications in the linking device to obtain first field device information that is associated with at least one of the field devices; and
sending the first field device information to the controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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17. A linking device for interfacing with a plurality of field devices having function blocks communicatively coupled via a communication network that uses a standard communication protocol and a controller, the linking device comprising:
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a communication stack communicatively coupled to the communication network that uses the communication protocol to monitor substantially all communications on the communication network;
a connection manager that uses the communication stack to coordinate communications on the communication network;
a function block data manager that selectively processes at least some of the monitored communications to produce function block information that is associated with at least one of the field devices; and
a database manager that sends the function block information to the controller.
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29. A field device interface system for use in a process control system having a controller and a user interface communicatively coupled together, a linking device having a processor therein coupled to the controller, and a plurality of field devices communicatively coupled to the linking device via a communication network that uses a standard communication protocol, comprising:
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a computer readable memory in the linking device;
a monitoring routine stored on the memory and adapted to be executed by the processor that monitors substantially all communications on the communication network;
a communications processing routine stored on the memory and adapted to be executed by the processor that selectively processes at least some of the monitored communications to produce first field device information that is associated with at least one of the field devices; and
a linking routine stored on the memory and adapted to be executed by the processor that sends the first field device information to the controller.
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Specification