Hi List, =20 Anyone using HART communications via RIN blocks in which the PNT_NO =3D = TV (tertiary variable) or PNT_NO =3D FV (fourth variable)? Both belong to the same parent ECB201. Please help. =20 We went for a really long stretch of NO SMURFs from 1/17/05 - 2/26/05. Then on 2/26/05 then I "accidentally" clicked "DONE" in the ICC on the parent ECB201. Immediately the RIN blocks for TV and FV smurfed and began repeatedly smurfing/unsmurfing. Then miraculously unsmurfed for an entire ~48hours. But as of this morning the the RIN blocks started repeatedly smurfing & unsmurfing as frequently as every few seconds but some times only every 5 - 10 minutes. The period and phase are different for each RIN block. =20 Note that the primary variable of flow is being read as PNT_NO =3D current, so there is no interruption in our process flow. But our process is considerably upset because we are using the TV and FV variables in enthalpy calculations. TAC is notified. No resolution yet. And we are very concerned about our process. Can anyone suggest how to troubleshoot why the digital communication is not working? The 4-20 signal is fine. =20 THANKS VERY MUCH. _______________________________________________________________________ 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