12 POU Editing ModeDVP-PM Application Manual 12-41z How to open Replace window in POU ladders:Method 1: Select “Replace” in the Edit menu.Method 2: Right click the mouse and select “Replace” from the drop-down list.Method 3: Press Ctrl + F on the keyboard.12.2 Edit POU Ladder DiagramPOU ladder diagram is partly different from general ladder diagram in programming interface. However, when usersapply POU ladder diagram for performing certain operation, which can also be performed by general ladder diagrams,they will have the same instruction list (IL) after compiling and achieve the same results as well. POU ladder diagramprovides two advanced functions comparing with general ladder diagrams: 1. Replacing devices with symbols; 2.Applying POU function blocks.12.2.1 Replace Devices with SymbolsAll devices in O100 main program, OX motion subroutines and Pn pointer subroutines can be replace by symbolsdeclared in local symbol table or global symbol table. Users should pay attention to the following rules when replacingdevices in program. Type of symbols should be specified in coordination with the limitation of operands in instruction. For example, thesymbol “data2” should be specified according to the valid range of the instruction DMUL DATA2 SCALE2
