Lenze PLC Designer PLC Designer (R2-x) Instrukcja Użytkownika Pobierz pdf (Strona 804)

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L-force | PLC Designer

PLC Designer Visualization

802 DMS 3.2 EN 02/2011 TD29 

Implicit variables as remanent variables:

The implicit variables of a Target-Visualization can be declared as remanent variables:

For this purpose the variables must be declared explicitly as global variables. This

declaration MUST be done in the topmost

(alphabetic order) global variables list in

folder 'Global Variables' in the Resources tab. If the declaration is placed in another

global variable list, a compile error will occur.

Example:

VAR_GLOBAL RETAIN

VisuDoExecuteUserlevelInit : BOOL := TRUE;

CurrentUserLevel : INT := 0;

CurrentPasswords : ARRAY[0..7] OF STRING[20] :=

'a','b','c','d','e','f','g','h';

END_VAR

* Regard for the variables CurrentUserLevel, CurrentPasswords[...]: Those must be of

the same type (normal, RETAIN, PERSISTENT...)! If they are defined as remanent

variables, additionally a variable "VisuDoExecuteUserlevelInit" of type BOOL must be

declared as a RETAIN variable in the global variables list, initialized with TRUE ("

VisuDoExecuteUserlevelInit : BOOL := TRUE;").

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