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Method and apparatus for configuring outage periods for scheduled diagnostic checks of field devices in a process plant

A technology of diagnostic inspection and field equipment, which is applied in the direction of program control, instrumentation, control/regulation system, etc., and can solve problems such as adverse effects of control perception, reluctance to use automatic diagnostic inspection, and influence on control system operation

Active Publication Date: 2017-08-15
FISHER CONTROLS INT LLC
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Problems solved by technology

[0008] Although it is beneficial to automatically perform diagnostic checks in response to detection of the occurrence of a diagnostic event, it is possible that the automated diagnostic checks can negatively affect the operation of the control system
Plant personnel may therefore be reluctant to use automated Diagnostic Exams and Tests

Method used

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  • Method and apparatus for configuring outage periods for scheduled diagnostic checks of field devices in a process plant
  • Method and apparatus for configuring outage periods for scheduled diagnostic checks of field devices in a process plant
  • Method and apparatus for configuring outage periods for scheduled diagnostic checks of field devices in a process plant

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Embodiment Construction

[0017] now refer to figure 1 , the process plant 10 includes a process control system 12 that is integrated with a safety system 14 (depicted within dashed lines), which typically operates as a safety instrumented system (SIS). The safety system 14 monitors the operation of the process control system 12 to ensure safe operation of the process plant 10 . The safety system 14 can override control of the process control system 12 if necessary.

[0018] The process plant 10 also includes one or more host workstations 16 or computing devices having a user interface (which can be any type of personal computer, workstation, etc.) that can be accessed by plant personnel. exist figure 1 In the example shown in, two workstations 16 are connected to process control / safety control node 18 and to storage device 20 by a common communication line or bus 22 as shown. The communication bus 22 can be implemented using any desired bus-based or non-bus-based hardware, using any desired hardwir...

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Abstract

A diagnostic system and method for field devices in a process plant is presented. The diagnostic device includes a processor operatively connected to the field device and having a schedule of prohibition periods stored in memory. If the occurrence of a diagnostic event is detected and performance of a diagnostic check does not coincide with the prohibition period, then the diagnostic check is performed at the field device.

Description

technical field [0001] The present invention relates generally to diagnostic checks of field devices in process plants, and more particularly to methods and apparatus for inhibiting execution of automatically scheduled diagnostic checks on field devices during an inhibit period. Background technique [0002] Process control systems and safety instrumented systems (SIS) typically include one or more controllers communicatively coupled to one or more field devices via a communication bus. The controller of each of the systems utilizes the field devices to perform various control functions within the control environment. For example, the field device can be used to open or close valves, increase or decrease fluid flow, and measure process parameters such as temperature, pressure, or fluid flow rate. [0003] Maintaining the process control system and the SIS of a process plant is an ongoing process that includes monitoring the operation of the field devices, periodically testi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
CPCG05B19/0428G05B2219/33331
Inventor J·D·塞勒S·F·阿米尔萨萨米
Owner FISHER CONTROLS INT LLC
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