Chapter 14 Sequential Function Chart 14.3.9 Assign Steps and the Transitions After the editing of a sequential function chart is complete, users must assign symbols to the steps and the transitions in the sequential function chart. Click a step or a transition first. After a yellow frame appears, users can type partial step name to see a dropdown list and then click to select the step or the transition. Click the button at the right side of the box which appears, and select an item created. The users can also assign a symbol to a step or a transition by means of the keyboard. They can move the yellow frame by pressing the up/down key on the keyboard.
After the users select a step or a transition, they can press Enter on the keyboard. The users can type characters in the box which appears and a drop-down list will appear. The users can select a symbol on the drop-down list by the up/down key on the keyboard. After the editing of the box is complete, the users can press Enter on the keyboard to jump to the next box. If the users want to end the editing, they can press Esc on the keyboard. Besides, if the step name the users type in the box for a step is symbol which is not declared, the Add Symbol window will appear after the users press Enter on the keyboard.
However, if the transition name the users type in the box for a transition is a symbol which is not declared, the Add Symbol will not appear. *.Transitions can be assigned as the element BOOL for the structure variable. Please refer to chapter 8, for more information about structure. *. Users can decide whether to allow the system to open the Add Symbol window automatically or not. Please refer to section 2.3.1 for more information about the setting. 14-43