If it's a matter of the accumulator in the CP with the logic resetting one cycle before the second CP, a brief delay in the logic for the first CP could accomplish the same thing as using a third CP. In other words, simulate the communication delay to the second CP with an artificial delay before resetting the first accumulator. 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