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more information required, please mention control system you are using and proper description. As not very much clear with question description.. will help to answer with your question...
Actually the system i was using there was for 37MW power plant where 1ES/OS and three Clients are deployed,the problem is thet whenever the oprator switch from one page to another the new page opens but there is nothing to display the screen is white.after few minutes ( say 4min. max) all the graphic objects appear,apart from that the current displaying screen also got stuck means the values showing there got freeze afetr some time again..rectified,both the promlem was occuring in non periodic fashion moreover the control system you are asking is just like a cptive power plant where AFBC,Turbovisory,WHRB system are bieng monitered and relative parameters are controlled and nothing else.
control system means which DCS, 800xa or freelance, etc ? is there any printer was configured for alarm or event printing, on this ES/OS ?
no..800XA 5.1 version with redundant controllers PM866,no as the problem is still persisiting no printers are still deployed but i futre a printer will reqiure
No idea with 800XA 5.1 but I have faced same issue once with freelance and the root cause was printer was configured on OS which was not working and spool buffer was full due to lots of alarm/events causing c drive loaded and due to taht screen freez and some strange behavior was happening, after giving path of spooling buffer in D drive OS was working fine, there was never a issue then.
Ok..i got that,is it possible that the issue is due to the difference in link speed of ES/OS with other Cliet..ethrnet speed may play a role in this problem??