Fisher-rosemount Systems, Inc

Fisher Controls International LLC

Mehul Rajeshbhai Dalal

Anthony Dean Ferguson

Todd Mitchell Toepke

Roger Benson

Alan Roger Dewey

Alden Chester Russell, Iii

Jon Dale Westbrock

Christopher P Kantzes

Christian R Butikofer

Sameer Parshuram Gorivale

Thinh D Le

A handheld maintenance tool operates to detect the existence of a fault in a communication line or bus, including detecting short circuit or other low impedance faults, open circuit or other high impedance faults, etc. Additionally, the handheld maintenance tool may operate to detect an approximate location of a fault within the communication line with respect to the handheld device, to thereby enable an operator or maintenance person to more easily find and repair a detected fault.

Detecting and locating process control communication line faults from a handheld maintenance tool

A portable field maintenance tool may perform one or more tasks, such as communicating with a field device, powering a field device, diagnosing a field device, or diagnosing a communication link in a plant environment to which a field device is connected. The portable field maintenance tool may interact with field devices configured according to a number of different communication protocols, such as the HART protocol and the Fieldbus protocol. The portable field maintenance tool may be energy limited and fault tolerant, and may operate in compliance with Intrinsic Safety standards, enabling use of the portable field maintenance tool in hazardous areas.

Portable field maintenance tool with resistor network for intrinsically safe operation

Portable field maintenance tool with a bus for powering and communicating with a field device

Multi-functional field maintenance (FM) tools that connect to process control devices, such as FOUNDATION Fieldbus and Highway Addressable Remote Transducer devices, can automatically detect and simultaneously identify communications, troubleshoot connections, and supply power in a process control plant. Simplifying the troubleshooting process, by guiding a user of a multi-functional FM tool through recommended troubleshooting steps, while simultaneously detecting and correcting issues reduces the number of tools required to maintain process control devices, reduces the risk of damage, and improves efficiency by minimizing production downtime.

Connection check in field maintenance tool

The present disclosure relates to program flow control monitoring routines. In one embodiment, a process control apparatus is provided with a plurality of modules associated with control and/or monitoring of a given plant. Program flow control monitoring routines are provided to monitor the various modules.

Program flow control monitoring routines, related methods and systems

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Pune, India

Mehul Rajeshbhai Dalal