Lenze PLC Designer PLC Designer (R2-x) Manual de usuario descargar pdf (Pagina 259)

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 DMS 3.2 EN 02/2011 TD29 257

x = value will be retained - = value gets reinitialized

after Online command VAR VAR RETAIN VAR PERSISTENT VAR RETAIN PERSISTENT

VAR PERSISTENT RETAIN

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Online Change

If a local variable in a program is declared as VAR RETAIN, then exactly that variable

will be saved in the retain area (like a global retain variable).

If a local variable in a function block is declared as VAR RETAIN, then the complete

instance of the function block will be saved in the retain area (all data of the POU),

whereby only the declared retain variable will be handled as a retain.

If a local variable in a function is declared as VAR RETAIN, then this will be without

any effect. The variable will not be saved in the retain area ! If a local variable is

declared as PERSISTENT in a function, then this will be without any effect also !

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Lenze PLC Designer PLC Designer (R2-x) Manual de usuario Pagina 259