History Log stopped reading
Our History Log Configuration aspect for a flow valve in control structure has stopped fetching the values when clicking on Read after a certain date, what shall i look for and is there any solution?
Just one valve - or several different tags ?
Is the log configuration heirarchical ? - ie is the data cascaded into several logs ? Are they all broken ?
Did you change something ? eg Add a log, edit the program etc ?
If there is no obvious cause for this one log failure or if multiple logs are afftected then many common problems in History can be solved by restarting the "Basic History" Services. If you have redundant history - stop / start one service and WAIT until it has fully syncronised before stopping/starting the other.
Ensure that object name is maintained unique through out the system.
Check that any service events related to the basic history services.
If u are unable to read data for all the logs configured as primary then its related to any of the following:
1.Basic history services stopped may be or restart both on by one.
2.check the space in the server to accomodate flat files