POU:

The selection list offers the POUs available in the active application. Select the one where you want to set a breakpoint.

Position:

The selection list offers the possible breakpoint positions of the selected POU. Depending on the editor type, these positions are defined by line and column numbers (text editors) or as network or element numbers (graphic editors). In case of a function block, (Impl)) is added additionally. You have to decide whether the breakpoint should be set in the implementation or in an instance. If it requires setting during the implementation, leave the option Instance Path disabled. If it should be set in an instance, enable the option Instance Path to select the instance.

Instances:

If the selected POU is a function block and this option is disabled, the breakpoint is set in the implementation body of the POU (refer to the Position element). If you want to set the breakpoint in an instance, enable the option and select the instance.

Tasks:

Only break if breakpoint is hit in one of the following tasks:

Enable this option if the breakpoint only should be effective in case the POU where it is placed is processed by certain tasks. This allows you to set a specific task to stop at the breakpoint within the POU and not in other tasks, which also use the same POU. Refer to Breakpoints and stepping in applications with multiple tasks. The tasks defined in the project will be listed for selection.

Hit Count:

Break always:

The program will stop at the breakpoint.

Alternatively:

The program will not stop at the breakpoint until the breakpoint has been reached the number of times defined (Enter the desired number or select it in the number field):

oBreak when the hit count is equal to

oBreak when the hit count is a multiple of

oBreak when the hit count is greater than or equal to

Condition

Break, if TRUE

If supported by the runtime system, you can use conditional breakpoints. Consult the Programming Guide specific to your controller to see if it supports conditional breakpoints. The condition can only be specified in online mode.

The specified condition is evaluated. Only if the result is TRUE, the program will stop at this breakpoint, the code of the execution point will be executed. You can enter valid boolean expressions as condition.

Example:

x>100, x[y]=z, a AND b, boolVar

NOTE: Using conditional breakpoints slow down the code execution even if the condition is not TRUE.

Break execution when the value of the specified variable changes:

oEnter a valid variable name.

oSelect a variable from the Input assistant dialog box (category Watch variables).

Execution point (Execution does not stop at breakpoint)

The breakpoint becomes an execution point. This means that the processing is not stopped at this point, but the given code is executed.

Execution point enabled:

Execution point disabled:

Execution point of a data breakpoint enabled:

Execution point of a data breakpoint disabled:

Execute the following code

Enter the code to be executed.

The following restrictions apply:

oCode size < 1200 bytes

oNo conditional statements, loop constructions (IF, CASE, FOR, WHILE)

oNo function block calls

oNo method calls

oNo bit-operations with AND, OR, NOT operators

oNo multiplication and division with other data types than INT

oNo calling properties in instances of an interface type

Additionally, this restriction applies:

The called functions and properties must match at least one of two following conditions:

1. In the View > Properties > Build dialog box, the option Enable system calls is activated.

2. The following attribute is added above the declaration of the function/the property: {attribute 'monitoring' := 'call'}.

Print a message in the device log

This option is available if the option Enable logging in breakpoints is activated in the Project Settings > Compile options dialog box. If the message should contain the present value of a variable, insert the variable name enclosed in curly brackets.

Example:

The present value of variable iCount is: {iCount}.

Enable breakpoint immediately

Select the Enable breakpoint immediately option to activate the breakpoint.

Deselect the Enable breakpoint immediately option to deactivate the breakpoint. To activate the breakpoint later, click the  button in the Breakpoints view.