Develop Program [Ladder Logic]

Double click Program.

Function Block scan program is very similar with main scan program.

Instead of END / PEND instruction, FB Program End will be used in FB scan program.

To change the option of FB scan editor, click Tool and choose CICON Options and click FB Option tab.

If you enter an instruction on a Rung, FB Variable pops up to select Variable.

Type Variable or Device name or Double-click Variable name or Device and click OK.

When a Rung is completed, red vertical line appears.

Example) If IN1 is ON, OUT1 is ON.

If you save the program, red mark will disappear.