Chapter 11 Function Block Diagram Method 3 Click the position into which an applied instruction, a comparison contact, or a function block will be inserted, and type the applied instruction, the comparison contact instruction, or the function block definition. As soon as the applied instruction, the comparison contact instruction, or the function block definition is typed, a box which can be edited appears. After the typing of the applied instruction, the comparison contact instruction, or the function block definition is complete, users can press Enter on the keyboard or click OK at the right side of the box.
(The applied instruction, the comparison contact instruction, and the function block definition are case-insensitive.) If users want to insert a function block, they have to type the function block definition, and they can not type the operands specifed in the function block. If users want to insert a comparison contact or an applied instruction, they have to type the comparison contact instruciton or the applied instruction, and they can type the operands specified in the comparison contact instruciton or the applied instruction. The users do not have to type all the operands specified in the comparison contact instruciton or the applied instruction.
The system will assign the operands typed to the corresponding boxes, and ??? will appear in the boxes where there are no operands. Besides, if the operands typed include a symbol which is not declared, the Add Symbol window will appear after the users press Enter on the keyboard. Please refer to programming manuals for more information about instructions. 11-25