Process Portal A2.1, OPC Trend Logger problems
- The wait-time can be changed in the Windows registry
The wait-time can be changed in the Windows registry where the Connectivity Server is installed. Do as follows:
• Run regedit.
• Go to HKEY_LOCAL_MACHINE\\SOFTWARE\\ABB\\Sigma\\System Modules\\History Server\\1.0-0\\private.
• Double click on the key TimeSkewExtrapolate. Change it to a suitable value. Preferably 15 seconds. This parameter is measured in milliseconds, which means decimal value = 15000 gives 15 seconds wait-time.
• Close the registry editor.
To make this parameter change accessible for the History Server you have to restart this service. Follow the steps below:
• Close all trend displays in all clients in the system. Important!
• Go to the Basic History Service provider in the Service Structure.
• Open the Service Provider Definition aspect and select the configuration tab.
• Disable Basic History Service provider, press Apply and wait for approximately 2 minutes (or until the Task Manager shows low CPU activity again).
Enable Basic History Service and press Apply.
[ref 3BSE029867D0005 VASMASOITA0305 ]
- Process Portal A2.1, OPC Trend Logger problems
OPC Direct Data Logging in History
For History OPC direct data logging exists a parameter for wait-time with a default value of 5 minutes to compensate for time synchronization differences. This wait-time is used when the data value has not changed before data is stored or drawn on the screen.
As an effect, the requested cyclic data update is stored and drawn 5 minutes after the current time. Each received data change will directly trigger data storage and presentation on the screen, i.e. no data is lost in either case.
Process Portal A2.1
OPC Direct Data Logging in History.