Chapter 15 Continuous Function Charts 15.2.4 Connecting objects and Canceling Connections When users click a pin of an object, and hold down the left mouse button, the target pins to which the pin can be connected are indicated by gray. When the users drag the mouse cursor to a target pin of an object, an arrow appears. After users release the left mouse button, the two pins will be connected. If users want to change the connection or cancel the connection, they can drag the line to a new target pin or to the blank. 15.2.5 Instructions and Function Blocks An instruction name and operands are shown in a block.
The orders in which the instructions in a continuous function chart are executed are indicated by the numbers in the right corners of the blocks representing the instructions. An instruction is executed only when the logic state connected to the En pin of the block representing the instruction is ON. Operand A function block in a continuous function chart is shown below. It is executed only when the logic state connected to the En pin is ON. Besides, the text on the top of the function block is the name given to the function block, i.e. a function block instance. Please refer to chapter 7 for more information about function blocks.
Function block instance Function block definition 15-11 Instruction name Execution order En pin Instruction name En pin