Hi folks, I have some questions about the cascade configuration of two PID blocks. In case of clamping in the secondary block, what happens with the output of the primary block? For example, if the secondary block clamps at 50% output, I think that the primary block should not keep integrating because in this a windup can occur at its output. If I am right, the anti-windup works when the BCALCO of the secondary block goes to the FBK and BCALCI of the primary block. Do I need anything else to prevent windup? Thanks in advance, Ignacio Queirolo Olivera Control Avanzado Complejo Industrial Ensenada Repsol YPF - Química Tel.: 54 221 429-8400 ext. 26481 Fax: 54 221 429-8400 ext. 26209 iqueiroloo@xxxxxxxxxxxxx <mailto:iqueiroloo@xxxxxxxxxxxxx> AVISO LEGAL: Esta información es privada y confidencial y está dirigida únicamente a su destinatario. Si usted no es el destinatario original de este mensaje y por este medio pudo acceder a dicha información por favor elimine el mensaje. La distribución o copia de este mensaje está estrictamente prohibida. Esta comunicación es sólo para propósitos de información y no debe ser considerada como propuesta, aceptación ni como una declaración de voluntad oficial de REPSOL YPF S.A. y/o subsidiarias y/o afiliadas. La transmisión de e-mails no garantiza que el correo electrónico sea seguro o libre de error. Por consiguiente, no manifestamos que esta información sea completa o precisa. Toda información está sujeta a alterarse sin previo aviso. 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 REPSOL YPF 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