You may also be able to implement the low cutoff in your AIN block (by Configuring an appropriate value for the SCI parameter). Below is one of a number of examples of signal conditioning with low cutoff (what's shown below is logic built in the AIN block). Refer to document B0193AW (Integrated Control Software Concepts) for the complete set. --------------------------------------------------------------------- SCI = 7: Square Root 12800 to 64000 raw counts with low cutoff IF raw_value <= 13184 THEN converted_value = LSCO1; ELSE converted_value = (SQRT(51200 * (raw_value - 12800)) * (HSCO1- LSCO1) / 51200) + LSCO1; --------------------------------------------------------------------- Regards, Ayoub Ghantous, Eng. System Integration & IT Invensys Systems Canada Inc Tel: 514-421-8310 Fax: 514-421-8054 Email: aghantou@xxxxxxxxxx -----Original Message----- From: Ken.E.Moore@xxxxxxxxxxx [mailto:Ken.E.Moore@xxxxxxxxxxx] Sent: Tuesday, May 18, 2004 4:55 PM To: foxboro@xxxxxxxxxxxxx Subject: Re: [foxboro] just a tip We have had the same problem in the past, we resolved it by adjusting the low flow cut off in the meter itself. This may or may not be an option for you depending on the meter you are using. Ken Moore NSCC-Wdrf Plant "Jaime Claramunt R. (Inforsa)" <jclaramunt@xxxxxxxxxxxxxxx>@freelists.org on 05/18/2004 04:28:16 PM Please respond to foxboro@xxxxxxxxxxxxx Sent by: foxboro-bounce@xxxxxxxxxxxxx To: foxboro@xxxxxxxxxxxxx cc: Subject: [foxboro] just a tip hey list, does anybody have a tip for this ... we have some flowmeters (AIN) that still indicates some when there is no flow... this is used then in ACCUM blocks, and I want to find the way to indicate this block to accumulate only values over a low limit...with limits ? clamping ? (without hold ...) thanks jaime Claramunt INFORSA Paper Mill _______________________________________________________________________ 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: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave __ This email has been scanned for Viruses and Spam. For more information please contact your local Information Security representative. ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ _______________________________________________________________________ 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: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave _______________________________________________________________________ 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: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave