The following procedures allow you to invalidate the function.
Open an [Option] dialog box by selecting [Option] from [Tool], and select [Editor] tab.
Clear the check box for tool chip watch. Initially, this check box is being checked.
When the tool chip watch function is on, every time a cursor points at variables in the source program window, emulator stops the program running briefly even during user program execution and gets value of the variables. Invalidating this function prevents this from happening when you point your cursor at variables unintentionally.