Back in the day, I suggested several changes to the SSEL block. Most of which were implemented (operator bypass, bypass on bad value, cascaded SSEL's for high and low, etc). The one that wasn't implemented was average which really irritated me for some reason. The capability is "right there" since there is an output that tells you how many values were used "upstream" and of course the average. This would have allowed a true average of unlimited values to be created. What we need is a system architect! Where can we find one? Regards, Alex Johnson Invensys Process Systems Invensys Systems, Inc. 10707 Haddington Houston, TX 77043 713.722.2859 (voice) 713.722.2700 (switchboard) 713.932.0222 (fax) ajohnson@xxxxxxxxxxx -----Original Message----- From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On Behalf Of Corey R Clingo Sent: Thursday, April 28, 2005 10:58 AM To: foxboro@xxxxxxxxxxxxx Subject: Re: [foxboro] filter 4-20 signal Interesting. One advantage to the CALC approach is that I was able to do 20 values at a time, where the SIGSEL limits you to 8. Corey Clingo BASF Corp. "Johnson, Alex (Foxboro)" <ajohnson@xxxxxxxxxxx> Sent by: foxboro-bounce@xxxxxxxxxxxxx 04/28/2005 08:53 AM Please respond to foxboro To: foxboro cc: Subject: Re: [foxboro] filter 4-20 signal Actually, you can feed the buckets into the SSEL block and tell it to average the inputs. This is simpler and easier to configure than the CALC block. Regards, Alex Johnson Invensys Process Systems Invensys Systems, Inc. 10707 Haddington Houston, TX 77043 713.722.2859 (voice) 713.722.2700 (switchboard) 713.932.0222 (fax) ajohnson@xxxxxxxxxxx -----Original Message----- From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On Behalf Of Clement, Mark (KIDDMET) Sent: Thursday, April 28, 2005 8:37 AM To: 'foxboro@xxxxxxxxxxxxx' Subject: Re: [foxboro] filter 4-20 signal The DTIME's buckets are accessible (connectable) - so you could tie the buckets to a calc block and do moving averages=20 my 2 cents Mark -----Original Message----- From: Corey R Clingo [mailto:clingoc@xxxxxxxxxxxxx] Sent: Thursday, April 28, 2005 9:27 AM To: foxboro@xxxxxxxxxxxxx Subject: Re: [foxboro] filter 4-20 signal The DTIME block has some options that will do this. I believe it can = take=20 several samples of an analog value and then spit out an average. = However,=20 it is not "rolling"; in other words, it gathers, say, 10 samples, and = on=20 the 10th it outputs an average. To get a rolling average, we have used CALC/CALCA blocks here. I've = seen=20 at least two implementations. I can post some CALC code if you like. And of course the filtering option on the AIN is there... Corey Clingo BASF Corp. _______________________________________________________________________ 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: 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: http://www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave