Data protection

Use
Data protection
 to create multiple user-defined global variables that retain their values when:
  • Restoring a controller project from a memory module (available for L20E, L50E, and L70E controllers).
  • Downloading a project, programs, variables, and controller configurations to a
    Micro800
     controller (available for L20E, L50E, and L70E controllers).
In
FactoryTalk Design Workbench
, the variables that are defined for data protection retain their values if the project stored in the memory module and the current controller project meet the following criteria:
  • The variable name, data type, and number of bytes are defined the same in both projects.
  • The arrays and array dimensions are defined the same in both projects.
  • The variable is configured with data protection in both projects.
Information in the data protection grid
Column
Description
No.
Displays the index number of the variable. Deleting a variable causes the indexes of all the subsequent variables to decrement by one.
Up to 60 global variables are supported for data protection.
Variable Name
Displays the user-defined variable name.
Data Type
Displays the data type of the global variable.
Supported data types are:
BOOL, BYTE, DATE, DINT, DWORD, INT, LINT, LREAL, LWORD, REAL, SINT, TIME, UDINT, UINT, ULINT, USINT, WORD, and USER ARRAYS.
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