Lenze PLC Designer PLC Designer (R2-x) - Manual (Page 401)

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The Resources
DMS 3.2 EN 02/2011 TD29 399
Example of a network variables list which was created by linking of an export file
*.exp and which got the name NETWORKVARIABLES_UDP:
Example of a network variables list, which has been created by loading an export file
*.exp and which was named Network_Vars_UDP:
Editing Remanent Global Variables Lists
If they are supported by the runtime system, remanent variables may be processed.
There are two types of remanent global variables:
Retain variables remain unchanged after an uncontrolled shutdown of the runtime
system (off/on) or an 'Online' 'Reset' in »PLC Designer«.
Persistent variables remain only unchanged after a program download.
Persistent variables are not automatically also Retain variables !
Remanent variables are additionally assigned the keyword RETAIN and/or PERSISTENT.
Network variables are also defined in this syntax.
Syntax:
VAR_GLOBAL RETAIN
(* Variables declarations *)
END_VAR
VAR_GLOBAL PERSISTENT
(* Variables declarations *)
END_VAR