Symbol: 
Function: This command opens the “Call Stack” view.
Call: Main menu “Debug”.
This view is very useful when you want to step into programs. It shows the current location with the complete call path.
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“Application” |
Name of the active application that controls the current POU |
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“Task” |
Name of the task that controls the current POU |
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“POU” |
Name of the POU where program execution has halted The first line in the list describes the current execution location (marked with a yellow arrow). If this location is in a block that is called by another block, then the call location is described in the second line. In turn, if the caller is called by yet another block, then that call location is described in the third line, and so on. |
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“Location” |
Position within the POU where program execution has halted
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“Instance path” |
Instance where program execution has halted |
The call stack is also available in offline mode and normal online mode when you are not currently using any debugging functions). In this case, it receives the last displayed location during a stepped execution, but it is displayed in gray.
The “Call Tree” view, in contrast to the “Call Stack”, at any time provides information on the calls of a POU.