Hi List I have several PIDA control block configured with the "MODOPT" parameter set to 6. In the FoxDoc (B0193AX - Rev N) I have found that this means that "non-interacting PID - sum of terms" has been selected. Can somebody please explain (very briefly if possible), the difference between "non-interacting PID" and "PID - product of factors"? Thank you. Ashley Davey Systems Engineer African Products (Pty) Ltd Gauteng Republic of South Africa -------------------- Tel : +27 11 458 5342 Fax : +27 11 458 5343 Mobile: +27 83 4535169 "All human actions have one or more of these seven causes: - Chance, nature, compulsions, habit, reason, passion, desire." ~ Aristotle _______________________________________________________________________ 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