Data Areas Properties

General properties

Number: Number of the data area.

Type: Defines the purpose and location of the data area. The following are available:

Linkable data areas in the System Manager:

• Input-Source
• Input-Destination
• Output-Source
• Output-Destination
• Retain-Source (for use with NOV-RAM memory, see appendix)
• Retain-Destination (for internal use)

Further data areas:

• Standard (visible but not linkable in the System Manager)
• Internal (for internal module symbols, which can be reached via ADS but are not visible in the System Manager)
• MArea (for internal use)
• Not specified (same as standard)

Name: Name of the data area.

Optional parameter settings

Size [Bytes]: Size in bytes. A special size configuration is provided for x64.

Comment: Optional comment that is visible, for example, in the instance configurator.

Context ID: Context ID of all symbols of this data area; used for the determination of the mapping.

Data type name: If specified, a data type with the specified name is created in the type system.

Create Symbol: Default setting for ADS icon creation.

Disable Code Generation: Enable/disable the code generation.

Optional Defaults

Depending on data type the default could be defined.

Optional Properties

A table of name, value and description for annotating the data area.
This information is provided within the TMC and also TMI files.
TwinCAT functions as well as customer programs can use these properties.