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mapp Services V5.16

Pragma IP_RETAIN controls whether declared elements will be retained when the source file is unloaded.

Syntax

#pragma IP_RETAIN ['ON' | 'OFF']

Description

•EIN: Retains the element in IP memory when all files that declare it are unloaded.

•OFF: Standard behavior. Removes the variable/type data when all files that declare it are unloaded.

If a retained variable has a custom data type, then this type must also be retained.

Pragma IP_RETAIN should not be confused with a VAR RETAIN declaration (variables stored in battery-backed PLC memory).

Example

#pragma IP_RETAIN 'ON'
VAR {IP_GLOBAL}
(*  Variables declared here will be retained when the declaration file is unloaded. *)
END_VAR