Please refer to the Settings Guide for details.
8.14.5 Common Settings (Symbol Variables) Settings Guide
The following explains how to register variables. For symbol registration procedures, refer to the following.
8.8.1 Procedure - Registering Symbol Variables
From the [Common Settings (R)] menu, select [Symbol Variable (V)]. The following window appears.
Double-click a cell in the [Name] column to enter a name. (For example, Switch1)
Click a cell in the [Type] column to select [Bit Variable].
For details on types, refer to the following.
30.3.2.2 Variable Type
To set up an array, select the cell in the [Array] column, and double-click the cell in the [Count] column to enter the Array Size. (For example, 5)
For details on the arrays, refer to the following.
30.3.2.3 Arrays and Array Sizes
If you do not want to delete a variable's data after turning off the display unit, click and select the associated cell in the [Retentive] column.
When the [Type] is [PID Variable], variables are always retentive.
For details on the retentive/volatile settings, refer to the following.
30.3.2.4 Retentive Variable Settings
Double-click a cell in the [Comment] column to enter a comment.
For details on comments, refer to the following.
30.7.3 Symbol Variable Comments
You can make changes to registered variables only when they are used in the logic program. You can delete variables that are not used on any screen.
To delete, select the symbol variable and click 
or press Delete.
To register the registered symbol variable to a part placed on a new screen, refer to the following.
8.8 Registering Addresses with Descriptive Names (Symbol Variables)