Thank you all for your help ....
For what I see, the tag update becames normal after start and stop the server in simatic Workstation... sometimes I have to start, stop and start again to the update turn normal again....
The way to solve the speed problem of update seems discovered .. the reason of the problem
i don't know ( peraphs what funstuff said .. something in the ethernet comunications, in the events of
windows seems all ok...what should i find if there is a buffer problem?).
This slow update happens more than 10 times a day i cannot tell the customer to
start and stop the server of simatic workstation...
Anyone kows how to do this (start and stop server of simatic Workstation) using software, with vb app and a windows schedulled task for example, since i cannot find the complete reason of the problem?