I agree it is a bad idea to do feedback control over a comm line. We are however issuing commands to start a sequence or change a batch time via the fox interface. The feedback that this has occurred is what is taking so long. Yes all of the scan rates are set to 1 second. Regards, Alan D. Weldon, PE Sr. Process Control Engineer Hunt Refining Company (205) 391-3345 =20 -----Original Message----- From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On Behalf Of Troy L Brazell Sent: Wednesday, October 27, 2004 8:01 AM To: foxboro@xxxxxxxxxxxxx Subject: Re: [foxboro] Upgrade question Alan, We are not doing write backs, only reading data. As my personal "law of control" I only do control hardwired. Josh, you want to chime in on this one? Since we are doing read only on the data I can't comment on what might be causing this. I am assuming that your scan rates, period and phasing is all much faster than the 5 seconds. Even though we don't do writes via the 224 would be very interested in what is going on. Thanks Troy Troy L. Brazell Duke Energy Field Services Sr. Process Control Analyst ISA CCST Phone (405) 263 4810 ext. 24 Cell (806) 898 4340 Okarche C&M Route 4 P.O. Box 40 Okarche, OK. 73762 =20 "Alan Weldon" <AWeldon@HUNTREFI To: <foxboro@xxxxxxxxxxxxx> NING.com> cc: Sent by: Subject: Re: [foxboro] Upgrade question =20 foxboro-bounce@fr eelists.org =20 =20 10/27/2004 07:53 AM Please respond to foxboro =20 =20 Troy, What is your experience with latency on the FBM 224. We just implemented a solution using a FBM 224 to talk to a Control Logix via a Prosoft Modbus mdoule. We are seeing around 5 seconds of latency from the time we issue a command til we get feedback confirmation. This is longer than I expected. I am not sure where the delay is occurring. What's your experience? Regards, Alan D. Weldon, PE Sr. Process Control Engineer Hunt Refining Company (205) 391-3345 =3D20 -----Original Message----- From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On Behalf Of Troy L Brazell Sent: Tuesday, October 26, 2004 3:33 PM To: foxboro@xxxxxxxxxxxxx Subject: Re: [foxboro] Upgrade question The loading is the same on the CP60 as if you were using standard blocks i.e. period and phasing. Now, I have not seen it loaded to 2000 points so I can only take the sales side. We are using the 224 to talk to an AB on a Solar Turbine. Beats the heck out of an AB Station and is way better than an Integrator. Next step will be to use the Ethernet FBM to replace our existing AB Stations. That one we haven't tried yet! Troy L. Brazell Duke Energy Field Services Sr. Process Control Analyst ISA CCST Phone (405) 263 4810 ext. 24 Cell (806) 898 4340 Okarche C&M Route 4 P.O. Box 40 Okarche, OK. 73762 =3D20 "Jaime Claramunt R. (Inforsa)" To: foxboro@xxxxxxxxxxxxx <jclaramunt@infor cc: sa.cmpc.cl> Subject: Re: [foxboro] Upgrade question =3D20 Sent by: foxboro-bounce@fr eelists.org =3D20 =3D20 10/26/2004 04:11 PM Please respond to foxboro =3D20 =3D20 great ! 2000 points / sec. how much does it load the CP60 ? (assuming it's working like this ) we have some issues with loading an ABStation or/and Int30... -----Mensaje original----- De: Troy L Brazell [mailto:tlbrazell@xxxxxxxxxxxxxxx] Enviado el: Martes, 26 de Octubre de 2004 16:55 Para: foxboro@xxxxxxxxxxxxx Asunto: Re: [foxboro] Upgrade question Running the FBM 224 (Modbus) ........ what a kicka..... device!!!! It can handle 2000 point at a 1 second scan. It is a little tricky to configure, but not too bad make sure and read all the way through the documentation as I felt like some of the step were slightly out of order. Has been a while since Josh Nix and I set it so I don't remember all of the details, but it wasn't as bad as doing an Integrator 30. Current project calls for Modbus and Profibus (tied to Siemens PLCs). Not there yet, but sometime after the first of the year. Troy Troy L. Brazell Duke Energy Field Services Sr. Process Control Analyst ISA CCST Phone (405) 263 4810 ext. 24 Cell (806) 898 4340 Okarche C&M Route 4 P.O. Box 40 Okarche, OK. 73762 "Jaime Claramunt R. (Inforsa)" To: foxboro@xxxxxxxxxxxxx <jclaramunt@infor cc: sa.cmpc.cl> Subject: Re: [foxboro] Upgrade question Sent by: foxboro-bounce@fr eelists.org 10/26/2004 02:56 PM Please respond to foxboro Troy, What kind of comm FBM's have you ? are they a "big step" from Integrators 30 and others ? thanks Jaime Claramunt Inforsa Paper Mill -----Mensaje original----- De: Troy L Brazell [mailto:tlbrazell@xxxxxxxxxxxxxxx] Enviado el: Martes, 26 de Octubre de 2004 15:10 Para: foxboro@xxxxxxxxxxxxx Asunto: Re: [foxboro] Upgrade question We are running 6.5 on several B Boxes with DM and the old historian. No problems at all. Reason we went to 6.5 was for the new communications FBM's which are really great. Of course you have to have CP60's as well. Troy Troy L. Brazell Duke Energy Field Services Sr. Process Control Analyst ISA CCST Phone (405) 263 4810 ext. 24 Cell (806) 898 4340 Okarche C&M Route 4 P.O. Box 40 Okarche, OK. 73762 "BrianLong" <blong@xxxxxxx> To: "Foxboro" <foxboro@xxxxxxxxxxxxx> Sent by: cc: foxboro-bounce@fr Subject: [foxboro] Upgrade question eelists.org 10/26/2004 12:08 PM Please respond to foxboro Anyone have an opinion on what Rev I should goto. I am currently running 6.1 with "B" boxes. Foxboro is telling me I need to goto 6.5 to resolve a few issues with my one new "F" box. I don't plan to change hardware but over time will move to more "F" boxes. Will 6.5 run with B boxes? I also plan to stick with DM and the old historian. Thanks, Brian _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: http://www.freelists.org/list/foxboro to subscribe: =3D mailto:foxboro-request@xxxxxxxxxxxxx?subject=3D3Djoin to unsubscribe: =3D mailto:foxboro-request@xxxxxxxxxxxxx?subject=3D3Dleave _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. 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