>The biggest problem with nuisance alarms still occurs during unit =3D > shutdown and startups. I don't know if there is an elegant way to = =3D > address this. But if someone has an idea, I am listening. >=20 In our plant we have settled an analisis group to analize all the = "posible" alarms when the plant shuts down. Now we have tables with signals to = change their priorities to 5 based on Interlocks contitions. The CADs will = have a filter to hide priority 5 alarms. So when an interlock trips all the asosiated alarms change their priorities to 5 and when it is reseted = alarms return to their original state. We choose to change priorities insteed = of inhibit them because we need alarms to know what is going on when some equipment doesn=B4t start.=20 Regads > Claudio A. Perez > Control Systems Engineer > PROFERTIL S.A. >=20 >=20 >=20 >=20 Esta informaci=F3n es privada y confidencial y est=E1 dirigida = =FAnicamente a su destinatario. Si usted no es el destinatario original de este mensaje = y por este medio ha tenido acceso a dicha informaci=F3n, por favor elimine el mensaje. La distribuci=F3n o copia de este mensaje est=E1 estrictamente prohibida. Esta comunicaci=F3n es s=F3lo para prop=F3sitos de = informaci=F3n y no debe ser considerada como propuesta, aceptaci=F3n ni como una = declaraci=F3n de voluntad oficial emanada de Profertil S.A. La transmisi=F3n de e-mails = no garantiza que el correo electr=F3nico sea seguro o libre de error. Por consiguiente, no manifestamos que esta informaci=F3n sea completa o = precisa. Toda informaci=F3n estar=E1 sujeta a alteraciones sin previo aviso.=20 This information is private and confidential and intended for the = recipient only. If you are not the intended recipient of this message you are = hereby notified that any review, dissemination, distribution or copying of = this message is strictly prohibited. This communication is for information purposes only and shall not be regarded neither as a proposal, = acceptance nor as a statement of will or official statement from Profertil S.A. = and/or subsidiaries and/or affiliates. Email transmission cannot be guaranteed = to be secure or error-free. Therefore, we do not represent that this information is complete or accurate and it should not be relied upon as such. All information is subject to change without notice. _______________________________________________________________________ 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