Flexible Function Blocks

• US 20060206218A1
• Filed: 05/26/2006
• Published: 09/14/2006
• Est. Priority Date: 08/23/1996
• Status: Active Grant

• Current Assignee: FieldComm Group, Inc.
• Original Assignee: Fieldbus Foundation (FieldComm Group, Inc.)
• Inventors: Hawkins, William M., von Le Suire, Michael, Glanzer, David A., Mitschke, Stephen B., Tateishi, Sergio Hideki
• Granted Patent: US 7,272,457 B2
• Time in Patent Office: Days
• US Class Current: 700/18
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G05B 19/042 using digital processors G05B19/05 takes precedence
• CPC Class Codes: G05B 19/056 Programming the PLC
• CPC Class Codes: G05B 2219/13101 Function block instance, only one function block exists, several instances
• CPC Class Codes: G05B 2219/13127 Hybrid sfc for description of sequence, ladder diagram for conditions, interlock
• CPC Class Codes: G05B 2219/15068 SBC single board computer, UCM universal control module
• CPC Class Codes: G05B 2219/23256 Hybrid programming, part sequence, part continuous
• CPC Class Codes: G05B 2219/25085 Several function expansion units for master, main unit, universal system
• CPC Class Codes: G05B 2219/25428 Field device
• CPC Class Codes: G05B 2219/31118 Universal interface between asi and fieldbus, for any fielddevice
• CPC Class Codes: H04L 67/125 involving control of end-device applications over a network
• CPC Class Codes: H04L 67/62 Establishing a time schedule for servicing the requests
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion

Abstract

A new and improved control system architecture using a combination of standard function blocks and new flexible function blocks eliminates the need for expensive and difficult to maintain custom control software and special I/O gateways for discrete/hybrid/batch and PLC applications. The end user builds application-specific flexible function blocks by configuring the number and type of inputs and outputs, and the block algorithm. Flexible function blocks and gateway flexible function block interconnect and interoperate with each other and with standard function blocks in a distributed control architecture.

Claims

1. An apparatus for operating in a block-oriented open control system comprising:

a memory, which includes system management data and a flexible function block;

wherein the system management data includes a system schedule;

wherein the flexible function block includes end-user configured parameters and an end-user configured algorithm;

a processor, operably connected to the memory, wherein the processor executes the flexible function block based on the system schedule; and

a medium attachment unit, which translates input messages and output messages between the processor and a transmission medium.

2. The apparatus of claim 1, wherein the flexible function block includes at least one device description.

3. The apparatus of claim 1, wherein the system management includes a plurality of function blocks and wherein at least one of the function blocks receives analog input data and makes the analog input data readable to another one of the plurality of function blocks as an output.

4. The apparatus of claim 1, wherein the plurality of function blocks include at least one flexible function block.

5. The apparatus of claim 1, wherein the system management includes a plurality of function blocks and wherein at least one of the plurality of function blocks receives discrete input data and makes the discrete input data electronically readable to another one of the plurality of function blocks as an output.

6. The apparatus of claim 5, wherein the plurality of function blocks include at least one flexible function block.

7. The apparatus of claim 1, wherein the memory stores a plurality of function blocks, including standard and flexible function blocks, and wherein a standard function block and a flexible function block are interconnected.

8. The apparatus of claim 7 wherein the processor controls the execution of the plurality of function blocks according to the system schedule.

9. The apparatus of claim 1, wherein the apparatus is operably connected to a digital bus.

10. The apparatus of claim 1 wherein the flexible function block has an input and output and the memory further includes:

a resource block, a first transducer block, and a second transducer block, wherein the resource block insulates the flexible function block from physical hardware, the first transducer block decouples the input to the flexible function block, and the second transducer decouples the output of the flexible function block.

11. The apparatus of claim 1, wherein the memory further stores a plurality of function blocks, including flexible and standard function blocks, and at least one object selected from the group consisting of link objects, trend objects, alert objects, and view objects.

12. The apparatus of claim 11, wherein a resource is defined by the plurality of function blocks and at least one object.

13. A system for permitting interoperability between devices in a block-oriented open control system comprising:

a plurality of devices, at least one device including a resource block and a flexible function block;

wherein the flexible function block includes end-user configured parameters and an end-user configured algorithm

wherein the resource blocks uniquely identify each device and the flexible function block processes parameters to produce an output message; and

a medium attachment unit, operably connected to the flexible function block, wherein the medium attachment unit translates an input message from a transmission medium to the flexible function block and the output message from the flexible function block to the transmission medium.

14. The system of claim 13, wherein each device includes a memory containing a system schedule, and wherein each flexible function block is executed according to the system schedule.

15. The system of claim 13, wherein at least one device includes an application built using a combination of at least one flexible function block interconnected with at least one standard function block.

16. The system of claim 13, wherein two or more of the plurality devices include a distributed application built using a combination of at least one flexible function block interconnected with at least one standard function block.

17. An apparatus for enhancing interoperability of a block-oriented open control system, the apparatus comprising:

means for storing at least one flexible function block, which includes contained parameters and a computer program, wherein the flexible function block includes end-user configured parameters and an end-user configured algorithm;

means, coupled to the storing means, for processing the flexible function block using the contained parameters, wherein the processing of the contained parameters produces an output parameter; and

means, coupled to the processing means, for translating messages from the processor for transmission on a transmission medium.

18. The apparatus of claim 17 wherein the storing means stores a system schedule and a plurality of function blocks, standard and flexible, and the processing means controls the execution of the plurality of function blocks according to the system schedule.

19. The apparatus of claim 17, wherein the storing means also stores a system schedule and the processing means processes the encapsulated flexible function block according to the system schedule.

20. An apparatus operating in a block-oriented open control system, the apparatus comprising:

a user layer, which includes a flexible function block to provide functionality, wherein the flexible function block includes end-user configured parameters and an end-user configured algorithm;

a physical layer, which translates messages from a transmission medium into a suitable format for the user layer and from the user layer into a signal for transmission on the transmission medium; and

a communication stack, connected to the user layer and the physical layer, wherein the communication stack includes a data link layer and an application layer, wherein the data link layer controls the transmission of messages onto the transmission medium and the application layer allows the user layer to communicate over the transmission medium.

21. The apparatus of claim 20, wherein the user layer includes a plurality of blocks interconnected to perform a desired function.

22. The apparatus of claim 21, wherein the plurality of blocks includes a resource block, a flexible function block, and a transducer block.

23. The apparatus of claim 21, wherein the plurality of blocks includes at least one standard function block interconnected with a flexible function block to perform the desired function.

24. The apparatus of claim 23, wherein the at least one standard function block interconnected with a flexible function block are distributed over a plurality of devices.

25. A memory for storing data for access by an application framework operating in a device within a block-oriented open control system, the memory comprising:

a data structure stored in the memory, the data structure including;

a resource block, which makes hardware specific characteristics of the device electronically readable; and

an flexible function block, wherein the flexible function block includes an end-user configured program and input and output parameters.

26. The memory of claim 25 further comprising at least one transducer block, wherein the at least one transducer block controls access to the flexible function block.

27. The memory of claim 25, wherein the data structure also includes a directory object to store a list of references to the resource block, flexible function block and transducer block.

28. The memory of claim 25, wherein the flexible function block is a gateway function block that maps the inputs and outputs of non-function block equipment to inputs and outputs of the flexible function block.