Yaskawa Ladder Works Operation Manual - Manual (Page 135)

5.5 OPERATION IN LADDER EDITOR
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5.5.2 Display Register Map
1.
Select Tool (T) - Symbol System (S) - Register Map (R) of the menu in the ladder editor.
2.
The register map window is displayed on the program window as the docking view.
3.
The map of the register used by the program is displayed.
4.
Click the Program specfication button,and select the programs.