12 POU Editing Mode
DVP-PM Application Manual
12-1
PMSoft version released after 1.03V (1.03V not included) supports POU (Program Organization Unit) editing mode,
which is also applicable to the program edited by older versions. POU editing mode can only be operated under ladder
editing environment and mainly performs two functions as below:
Function 1: User-defined function blocks (FB). FB can be used for O100 main program, OXn motion subroutines, Pn
subroutines, and FB subroutines. PMSoft can import or export FB subroutines.
Function 2: Devices in ladder diagram can be replaced by symbols. Symbols in ladder diagram or FB can be allocated
with devices by users or by system.
Functions of POU help users on simplifying programs and modulizing program structure, so as to save the time spent
on developing program. In this chapter, we will introduce POU ladder editing environment, POU ladder editing methods,
POU online monitoring and POU Hint function.
12.1 POU Ladder Editing Environment
When PMSoft creates a new project or opens an old project, it enters ladder editing environment. POU functions
including Local Symbols, Global Symbols, Symbols Allocation and Function Blocks will be listed under System
Information as below.
Symbols
Allocation
Global
Symbols
Local Symbols
Function
Blocks
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