Chapter 11 Function Block Diagram 11.2.2 Use Devices, Symbols Constants in FB Diagram Before users edit a node or an operand of an instruction, they have to click the node or the operand. Click in the box, and then select a symbol on the drop-down list. If a symbol whose data type is ARRAY is declared, the elements in the array will be on the drop-down list. Ary[…] in the figure below are elements. The users can type a device name or a symbol in the box. If they type a symbol which is not declared, the Add Symbol window will appear after they press Enter on the keyboard.
(Please refer to section 2.3.1 for more information about declaring a symbol.) After users click a network and press Enter on the keyboard, they can edit a box. The users can edit the next box in the network after they press Enter on the keyboard. Besides, the next network will be selected after the users press Tab on the keyboard. The users can edit a box with the keyboard. If the users have declared symbols, they can press Page Down on the keyboard when they edit a box. The users can select a symbol by the up/down key on the keyboard. After the editing is complete, the users can press Enter on the keyboard to jump to the next box.
If the users want to end the editing, they can press Esc on the keyboard. Additional remark (a) If users want to use constants in a function block diagram in ISPSoft, the constants must be represented in the following ways. Decimal value: 23456 (A value which is not preceded by any mark will be regarded as a decimal value.) Hexadecimal value: 16#5BA0 (A value is preceded by 16#.) Octal value: 8#55640 (A value is preceded by 8#.) Binary value: 2#101101110100000 (A value is preceded by 2#.) String: “XYZ” (Characters are put in double quotes.) BOOL: Need to use normally-open or normally-closed contact AH/AS Series: Use SM400/ SM401 . 11-11