Emerson Adds Foundation™ Fieldbus Segments To Existing DCS At BP Hull

  • January 05, 2004
  • Emerson Automation Solutions
  • News
Rosemount® Fieldbus Interface Module enables cost effective temperature profiling of over 200 pointsCHANHASSEN, MINN (January 5, 2003) - BP has used the Rosemount 3420 Fieldbus Interface Module from Emerson Process Management to realize the benefits of adding FOUNDATION™ fieldbus technology to its existing plant and traditional DCS control system on their Hull chemicals plant in the United Kingdom. FOUNDATION™ fieldbus is a key technology used by Emerson’s PlantWeb® digital plant architecture.When BP initiated the project requiring temperature monitoring of over 200 points on their ethyl acetate process reactors, in a Zone 2 hazardous area, the attractions of the reduced cabling and fewer interface modules needed with a fieldbus solution were considerable. The Emerson proposal for monitoring 200+ points using just two FOUNDATION fieldbus segments involved Rosemount 848T multi-point temperature transmitters on the plant, each monitoring eight RTD sensors or thermocouples. Up to 13 of these 848T units can be looped onto a single fieldbus segment, powered by the 3420 Fieldbus Interface Module, allowing a single cable connection to collect data from 104 temperature sensors.Each FOUNDATION fieldbus segment requires just one cable pair into the control room, with one hazardous area barrier unit. The advantages to BP were significant: on an existing plant, to run new multicore cable over the full 250 meters from the control room would have required erection of scaffolding, and a timescale that was unacceptable. By using spare pairs of cables within existing multi-cores, the few cables needed were already in place. BP saved installation cost plus time. Eventually approximately 280 temperature points were monitored on the four reactors, using three fieldbus segments linked to two Rosemount 3420 units to provide redundancy. Each 3420 Fieldbus Interface Module extracts the individual temperature readings from the transmitters, and uses a Modbus connection to transmit the data to the main control system, in this case a TDC3000. This simplifies the data interface to the control system, saving expenditure on extensive I/O additions. Project Manager for BP, Frank Wilson, is delighted with the outcome: “We have added three FOUNDATION fieldbus segments onto a conventionally controlled plant, which has a Honeywell TDC 3000 control system, and turned a major expansion of instrumentation I/O into something as simple as adding a single Modbus interface.” Wilson continued, “Plus, we have further benefits from FOUNDATION fieldbus interrogation and communications, allowing us to monitor each sensor using our site Ethernet connection direct to the Rosemount 3420 Fieldbus Interface Module.”The first project at Hull was to provide detailed monitoring of process temperature gradients during the addition of a process catalyst, on part of the ethyl acetate production, where several multi-point sensors are needed to provide the detailed overview of temperature conditions. Process improvements have resulted, the benefits of which are still being evaluated. The best measure of success is that additional similar temperature monitoring points and fieldbus segments have been allocated to the vinyl acetate plant, and two further 3420 Fieldbus Interface Modules are to be installed. Ron Migliorini, Rosemount VP for Marketing in Europe, Middle East and Africa, is delighted to see the first major European application for these units installed and commissioned so easily, despite the fast-track nature of the BP project. “The 848T and the 3420 Fieldbus Interface Module have provided an ideal solution for BP, providing lots of additional measurement points, and adding these simply into their existing DCS. The Rosemount 848T and 3420 combination allow the economical retrofit of multiple sensors to give detailed local process data in a quickly installed and cost effective manner. But the major spin-off is that the BP process engineers have the opportunity to use FOUNDATION fieldbus and gain experience of the advantages of modern digital communications – like that used with Emerson’s PlantWeb digital plant architecture - across the plant.”About Emerson Process ManagementEmerson Process Management (www.emersonprocess.com), an Emerson business, is a leader in helping businesses automate their production, processing and distribution in the chemical, oil and gas, refining, pulp and paper, power, food and beverage, pharmaceutical and other industries. A division of Emerson, Rosemount (www.emersonprocess.com/rosemount) is a global leader in the design and manufacture of process instrumentation, including a complete line of pressure, temperature, flow, and level products. Emerson brands include PlantWeb®, Rosemount®, Micro Motion®, Fisher®, DeltaVTM, Ovation®, and AMS™ Suite.About EmersonEmerson (www.gotoemerson.com) is a global leader in bringing technology and engineering together to provide innovative solutions to customers in process control, electronics and telecommunications, industrial automation, heating, ventilating and air conditioning, and appliance and tools. Sales in fiscal 2003 were $14billion.Rosemount, PlantWeb, Micro Motion, Fisher, DeltaV, Ovation and AMS are marks of Emerson Process Management. FOUNDATION is a mark of the Fieldbus Foundation. Other marks are the property of their respective owners.

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