About This Application can remain continuously active. As long as a thread is active, the operating system can switch to that thread. • Period (from IWS): Specifies the maximum amount of time each IWS thread (except the Background Task) can remain inactive. Caution: We strongly recommend that you do not modify these default values unless it is absolutely necessary. Configuring these parameters incorrectly can cause the entire system to malfunction (for example, CPU usage will go to 100%) and/or cause some tasks to perform poorly. If you must change the parameter defaults, note the values before making your changes so if a malfunction occurs you can return to the original settings.
To change the IWS TimeSlice and Period parameter default values: 1. From the IWS installation directory (for example, C:\Program Files\ installation folder \Bin ), double-click \BIN to open the folder. 2. Double-click the Program Settings.INI file to open the file in Microsoft ® Notepad. The following is a list of all parameters contained in this .ini file and their default values (in milliseconds). [Period] DBSpy=1000 UniDDEClient=200 UniDDE=200 Driver=20 LogWin=100 UniODBCRT=100 OPCClient=20 OPCServer=20 TCPClient=100 TCPServer=100 Viewer=50 [TimeSlice] UniDDEClient=100 Driver=10 OPCClient=10 OPCServer=10 TCPClient=200 TCPServer=200 Viewer=200 Note:
You may not see all of these parameters listed when you open your Program Settings.INI file. However, even if a parameter is not visible in your list, IWS still uses that parameter and its default value. • To change the default value of a displayed parameter: In Notepad, delete the default value and type the new value in its place. • To change the default value of a parameter that is not displayed in your list: In Notepad, type the parameter name exactly as shown in the following list, the equal sign, and then the new value. 3. Save the file ( File > Save ) and close Notepad ( File > Exit ). Page 22 InduSoft Web Studio