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State machine function block with user-definable actions on a transition between states

A technology for switching actions and state transitions, applied in the field of function blocks, it can solve problems such as limited capabilities of control technology or other characteristics associated with state transitions, and achieve the effect of reducing demand

Active Publication Date: 2015-01-21
FISHER-ROSEMOUNT SYST INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Consequently, current process control systems are limited in their ability to perform certain safety measurements, control techniques, or other characteristics associated with state transitions

Method used

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  • State machine function block with user-definable actions on a transition between states
  • State machine function block with user-definable actions on a transition between states
  • State machine function block with user-definable actions on a transition between states

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Process Plant Example

[0026] figure 1 is a block diagram of an example process plant 10 including one or more nodes 12 , 16 , 18 and 20 . exist figure 1 In the example process plant 10 of , each of the nodes 12 and 16 includes a process controller 12a, 16a connected to one or more field devices 22 and 23 through an input / output (I / O) device 24, wherein the input / output ( I / O) device 24 may be, for example, a Foundadon Field bus interface, a HART interface, or the like. Controllers 12a and 16a are also coupled to one or more hosts or operator workstations 18a and 20a in nodes 18 and 20 via a network 30, which may comprise, for example, one or more buses, wired local area networks such as Ethernet LAN (LAN), wireless LAN, wide area network (WAN), intranet, etc. Operation Staff workstation nodes 18 and 20 are often located in a control room or other less hostile environment within easy reach of controller personnel.

[0027] In general, workstations 18a and 20a of ...

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PUM

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Abstract

A control system, a safety system, etc., within a process plant may each use one or more state machine function blocks that can be easily integrated into a function block diagram programming environment. Such a state machine function block may include one or more inputs, which may cause a state machine implemented by the state machine function block to identify a next state as well as one or more transition actions to perform in accordance with transitioning from a current state to the next state. Configuration data associated with the transition actions may be retrieved from a database based on the current and next states of the state machine and at least one of the inputs. The state machine function block may also include one or more outputs that are generated based on the state transition.

Description

technical field [0001] The present disclosure relates to functional blocks for a process plant, and more particularly to configuring and implementing a state machine associated with a process plant. Background technique [0002] Process control systems, such as those used in chemical, petroleum, or other processes, typically include at least one host or operator workstation communicatively coupled by an analog, digital, or combined analog / digital bus or line and to a One or more process controllers for one or more field devices. Field devices, which may be, for example, valves, valve positioners, switches, and transmitters (eg, temperature, pressure, and flow rate sensors) perform functions within a process plant such as opening or closing valves and measuring process parameters. The process controller receives signals indicative of process measurements made by the field devices and / or other field device-related information, uses this information to implement control routin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418G08C17/02H04L29/06G06F17/30
CPCG05B9/02G05B19/418G05B19/0426G05B2219/23289G05B19/41835G06F3/0484G06F3/048G06F3/033G06F3/01G05B19/402G05B2219/40585
Inventor G·K·劳G·R·谢里夫
Owner FISHER-ROSEMOUNT SYST INC
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