Chapter 11 Function Block Diagram (2) In addition to the structure in the figure above, users may be allowed to insert the mark P/F into another structure. If users are allowed to insert the mark P/F into the position selected, on the toolbar can be clicked. After users click , the mark P will be inserted. If the users click again, the mark F will be inserted. 11.2.6 Setting an Output and Resetting an Output In a function block diagram in ISPSoft, the mark S on an output node indicates that the output node is set to ON, and the mark R on an input node indicates that the output node is reset to OFF.
Users are not allowed to insert S/R into the operands of a function block/an applied instruction. Graphical representation Example Example 1: If M0 is ON, M1 will be reset to OFF. Example 2: In the figure below, the mark S is inserted into the output node representing M3, and the mark R is inserted into the output node representing M4. 11-19 S/ R