You can apply an expression to apply to any breakpoint (either code breakpoints or data breakpoints).
Click the Breakpoint Properties button. The Breakpoint Properties dialog will open. An example is displayed below.

Select the Conditional Breakpoint checkbox.
Click the OK button. A question mark will appear in the breakpoint’s symbol in the Source Debugger: action window (Breakpoints tab) and in the code display, and a field will open to allow you to enter an expression in the Action window (Breakpoints tab).
Enter a valid expression in the field (such as \Name == "AI20_1").
Click the OK button to the right of the field in the Action window (Breakpoints tab).
Note: You must use the scope resolution operator (\) at the beginning of the expression, or an "unknown variable or function" error will result.