Chapter 18 Testing and Debugging Tools If users want to manipulate a step or a transition in a continuous function chart, they can double click the shown status to switch from True to False or vice versa. The items on the context menu are described below. Before the status of a device is changed, users have to make sure that the operation does not affect the operation of the system, or cause damage to the system or the staff. 18-9 Item Description Set On Setting the contact selected to ON Set Off Setting the contact selected to OFF Rising-edge Trigger No matter what the state of the contact selected is, the system set the contact to OFF, and then set it to ON.
Falling-edge Trigger No matter what the state of the contact selected is, the system set the contact to ON, and then set it to OFF. Change Present Value Users can set the value of the operand selected. Force Forcing an input contact or output contact ON or OFF Force Device List Forcing several input contacts or output contacts in the tables ON or OFF