Have a look at "LIM" block. I use it between a AIN & ACCUM block. Regards Ajay Tathgir 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: http://www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave