Creating or editing action blocks in FBD

How to create an →action block in the →graphical FBD-editor:

1. From the context menu of the FBD-editor, select Create and select Action Block. Alternative: Press Ctrl+Shift+F, A.

2. Position the action block where you need it.
   During this user action, it is possible that affected lines are automatically rerouted. If the positioned element is presented with a red rectangle, the destination is not possible.
   You might want to use the following key while positioning the element: Press the ESC-key, if you do not want to position the element and abort the action.

3. Press the primary mouse button or the Enter-key to create the action block.
   If the action block is highlighted as faulty, the new name is causing an error. Enter another name or correct the other FBD-logic until the FBD-object does not contain any faulty FBD-elements.

How to change the name of an action block:

1. Double-click the field with the action name (e.g. A0) and enter the new name. The name must be an →IEC-identifier.
   You are able to enter the name of an already existing variable, if this variable is a local variable of output variable and the data type of the variable is BOOL.

2. Press the Enter-key or click anywhere outside the element so that the new name is entered. Press the ESC-key, if you want to discard the new name.
   If the elements are highlighted as faulty, the new name is causing an error. Enter another name or correct the other FBD-logic until the FBD-object does not contain any faulty FBD-elements.

How to change the action qualifier of an action block:

1. Double-click the field with the action qualifier (e.g. N) and enter the new action qualifier.

2. If you want to use the action qualifier L, D, SD, DS, SL or PN, you have to add the character : after the action qualifier. After the character :, enter a duration literal of data type TIME (see →Time literal for examples on duration literals) or an already existing →variable of →data type TIME.
   Examples: L:T#1s or D:TimeDelay (with TimeDelay being an existing TIME variable)

3. Press the Enter-key or click anywhere outside the element so that the new action qualifier is entered. Press the ESC-key, if you want to discard the new action qualifier.
   If the elements are highlighted as faulty, the new action qualifier is causing an error. Enter another action qualifier or correct the other FBD-logic until the FBD-object does not contain any faulty FBD-elements.

How to change the field proportion within an action block:

1. Point to the inner horizontal line within the action block.
   Result: The mouse cursor changes its shape.

2. Press and hold the primary mouse button, drag the line to the requested size and release the primary mouse button.