If a trace is running on the device, it is indicated in the trace dialog box Online List.
In order to start the trace in online mode, download explicitly the trace to the controller with the Trace > Download Trace menu command while the application is logged in. The graphs of the trace signals will be displayed in the trace editor window.
While doing logins and logouts on the application without changing it, the traces are running without a new download.
If the application code is changed, then it depends on the login mode, in what happens with the traces:
oLogin with online change or Login without any change: The traces are still running.
oLogin with download: The traces in the controller are deleted and a new download of them is necessary.
Online Change of the Trace Graph Configuration
The Trace Configuration dialog box with Record Settings and the Trace Configuration dialog box with Variable Settings are available in online mode and quite a few changes on the trace configuration can be performed while the trace is running. If this is not possible, when the name of the trace signal is changed; for example, the trace is stopped and a new download is required.
Online Navigation of the Trace Graph
The displayed range of the captured trace variable values depends not only on the trace configuration. It can also be rearranged by scroll and zoom functionalities available in the Trace menu, the toolbar or by using shortcuts. For information on how to navigate in the trace diagram, refer to the Keyboard Shortcuts chapter.
