Brian, Take a look at the PERIOD and PHASE of each block. Are they configured for the same PERIOD and resetting within the timing of the configured PERIOD? You might consider running them on a shorter period, or adjusting the PHASE of one to take out the off-set. I don't think you could count on the phases of one CP consistently lining up with the phases of the second CP, though. Jerry Hidahl Process Control Engineer Port Neches Performance Products Huntsman Corporation _______________________________________________________________________ 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