>But, it doesn't change the design goal of CSA, i.e., that the loss=20 >of CSA does not impair operation of the plant and that you can=20 >schedule access to CSA for your convenience. I beg to differ. When half of the available screens in a control room are locked up due to a dead CSA, I'd say that pretty much impairs operation. Yeah, Alex, I know you said that it shouldn't happen, but watching it happen for daily for a week convinced me that screen lock-up *does* happen when CSA died. (And I can't blame human nature to want to see if happens again on another screen when the first one is locked up. Now you got two screens at are out of commission for 5-6 minutes!) My problem with a CSA hang-up is still there -- I just get better at mitigating the symptoms when it happens. Duc -----Original Message----- From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On Behalf Of Johnson, Alex P (IPS) Sent: Friday, February 24, 2006 3:44 PM To: foxboro@xxxxxxxxxxxxx Subject: Re: [foxboro] Conectivity between nodes I don't know if they need it or not. But, it doesn't change the design goal of CSA, i.e., that the loss of CSA does not impair operation of the plant and that you can schedule access to CSA for your convenience. Regards, =20 Alex Johnson Invensys Systems, Inc. 10900 Equity Drive Houston, TX 77041 713.329.8472 (voice) 713.329.1700 (fax) 713.329.1600 (switchboard) alex.johnson@xxxxxxxxxxxxxxxx -----Original Message----- From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On Behalf Of Weiss, Andreas Sent: Friday, February 24, 2006 10:50 AM To: foxboro@xxxxxxxxxxxxx Subject: Re: [foxboro] Conectivity between nodes > The theory behind CSA is that it is needed only for=3D20 > configuration and that > maintenance can be scheduled around that activity. Taking it down is > supposed to have no impact on operations. >=3D20 We run scripts every night. These scripts use iccprt and other iccdrvtsk functionalities to extract the control station database and export it into other formats. I think that these tools didn't work without an CSA. I've never checked it should I? Regards, Andreas =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 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