If interlocks do security functions, they Must be implemented on an Independent protecion Layer (a PLC totally independent from DCS). Take = a look to IEC61511/ISA-SP84.1 Regards Claudio A. Perez Sr. Control Systems Eng. PROFERTIL S.A. (54) 291 459-8139 cperez@xxxxxxxxxxxxxxxx www.profertil.com.ar -----Mensaje original----- De: danvar@xxxxxxxxxxxxxx [mailto:danvar@xxxxxxxxxxxxxx] Enviado el: Mi=E9rcoles, 11 de Mayo de 2005 12:02 Para: foxboro@xxxxxxxxxxxxx Asunto: [foxboro] Reduce IFL's for FBM Hi, Generally, in my job, the people configure the ladder like PLB's. = (FBM217- FBM242), but in the ladder for every motor it has spent 4 IFL's, = leaving only=20 8 motors by FBM. I've been thinking in try to reduce the number of IFL's for FBM. maybe, using=20 GDEV block, what do you think??, do you have any example that can help = me?,=20 Thanks for your help. Daniel Vargas Telesat, m=E1s f=E1cil...m=E1s Internet. http://www.telesat.com.co/ =20 =20 _______________________________________________________________________ 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 =20 foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: = mailto:foxboro-request@xxxxxxxxxxxxx?subject=3Djoin to unsubscribe: = mailto:foxboro-request@xxxxxxxxxxxxx?subject=3Dleave =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 and you = have received this information, please delete the message. You are hereby notified that any 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. Email transmission cannot be guaranteed to be secure or error-free. Therefore, we do not represent = that this information is complete or accurate. 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