IFPAC NeSSI workshop: 14 Jan 2004

Attendees

John MosherHoneywell

Rob DuboisDow

Jeff GunnellExxonMobil

Rod KastrupExxonMobil

Robert ShermanCIRCOR International

Steve DoeParker

Jim RydzakGlaxoSmithKline

Saskia FeastCyrano

Terence McMahonControl Magazine

Ulrich BonneHoneywell

John WawrowskiSwagelok

Bruce KeenCIRCOR International

Rajko PuzicImp[erial Oil

Dan PodkulskiExxonMobil Chemical

John CumbusExxMobil Chemical

John V TworkEastman Chemical

Kelsey CookMCEC

David SmithRestek

Joe AndrisaniDupont

Daqve VelkampCPAC

Richard EscottGSK

Mel KochCPAC

Steve JacobsEastman Chemical

Bob AdamsARLS Inc

Wolfgang HroschIn Process Instruments

Bill MenzSwagelok

Dave SimkoSwagelok

Steve GlaudelBrooks Instrument

Rich FlavelBrooks Instrument

Brian MarquardtCPAC

Road map

  • Need a decision on sensor bus before spending money on developing Gen II

- any decision is better than no decision!

  • Improvement device for legacy systems or enabler for new technology?
  • Do we really need highly sophisticated flow sensors - or just need to know if sample is present or not.

- believe (Dow) that need validation info to break maintenance cycle

- many surveys say ' future is in intelligent miniature closed loop control': Dave Simko can supply references for CPAC NeSSI site - pass on to Rob Dubois

SP76 component list

  • How to administer?

- CPAC could let people do it as they want on a web page

- or could post message on discussion group and post into that: favoured by CPAC

- dynamic, needs access

- could do it in the next week

  • Seems valuable, let's do it: Dave Velkamp to set it up

Bigger substrate?

  • Higher viscosity streams - just heat it, don't go bigger
  • Vendors don't want to support 2 substrates

- can get maybe 50% applications (EM); 80% (Dow), 25% (EM refinery)

  • Pharma thinks it's too small - from an earlier discussion they had
  • What would water industry think? Need to check out better with other industries - later
  • Seems like the problem is not the substrate channels, it's the flow path in the components. However a larger flow path than the substrate would just add dead volume.
  • One limitation is the orifice - 0.118". Could maybe squeeze a bit more out of the orifice via O-ring design.
  • Current liquid experience: MON, RON, BZ, aromatics service OK. Seems like diesel down will be OK as is
  • Stick with what we have - doesn't seem to be the driver or the market

Legacy connectivity

  • Installing a new Ethernet system into the field is expensive - new home run cable etc makes the first few drops very expensive…
  • …but can do it on existing copper, using sDSL modems. This won't be ultra high speed but will be fast enough that it is transparent to the user.
  • Future option: do it wireless
  • Alternative of keeping the legacy system in place as far as the control and doing the protocol conversion there 'don't hunt' - doesn't allow future use of a SAM in the field
  • Add a hub to attach SAM into the Ethernet and eliminate 4-20 mA.
  • With a legacy system it is important to pick up additional information which is available in the analyzer.
  • An alternative configuration could have the SAM inside the GC controller - an embedded SAM - and include it inside the architecture - it should be transparent to the analyzer folks
  • Need to have standardization on the software tools

SAM (Sensor Actuator Manager)

SAM needs these things:

  • High end Gateway to Ethernet LAN.
  • Low end bus (NeSSI bus) - needs to handle I/O function blocks to allow 4-20mA - this is always possible.
  • Local human - machine - interface: PDA - wired or wireless - WiFi, Bluetooth,…
  • User configurable control - custom code space
  • Software applets APPI - for repetitive tasks / sensor management
  • Custom programming space for proprietary applications.
  • Short term data storage.
  • Chipsets are low power - can be IS.

OPC - OLE for Process Control

Concern - these things are not plug and play like USB. It needs to be done well.

- The high level stuff will be work for the systems guys - very site specific.

- Low end NeSSI bus has to be to plug and play.

Contenders for bus - what are the real cost differences / size / temperature constraints?

Cost of the bus chips isn't too important compared to lifecycle benefits.

DOW RESTRICTED - For internal use only