Chapter 6 Symbol Variables (6) If users want to set the initial value of the symbol, they can type the initial value in the Initial box. If the data type of the symbol is ARRAY, the Array Initial Values window will appear after the Initial box is clicked. In the Array Initial Values window, users can set the initial values of the elements in the array. If the data type of the symbol is BOOL, the initial value is either TRUE (abbreviated to T) or FALSE (abbreviated to F). If users type 1 or 0 in the Initial box, the system will automatically convert it into TRUE or FALSE.
If the data type of the symbol is STRING, the number of characters in the Initial box cannot be larger than the maximum number of characters in the string which has been set. The characters cannot be put in double quotes. Otherwise, the double quotes will be regarded as a part of the string. For DVPxxMC/ AS5xx, users can add apostrophe to the first and last character in a string. When the data type of the symbol is function block or user-defined, the Initial column cannot be setup. Supporting structure text language, the expression for initial values of DVPxxMC and AS5xx series is shown as follows:
(7) If After users click the Comment box, they can type a comment about the symbol in the drop-down box that appears. (8) There are three checkboxes in the Add Symbol window. Please refer to the descriptions below for more information. After users make sure of the setting, they can click OK to add the symbol. 6-27