AH500 Motion Control Module Manual PLS is a rising-edge output instruction. When X0.0 is turned from OFF to ON, the instruction PLS is executed. M0 sends a pulse for a scan cycle. Explanation Ladder diagram Instruction code: Description: Example X0.0 M0 Loading the Form A contact X0.0 LD X0.0 Loading the Form A contact M0 Timing diagram: LD M0 SET Y0.0 Y0.0 remains ON. X0.0 M0 One scan cycle Y0.0 4-14 Instruction code Operand Function PLS S Rising-edge output Device Xn.n Yn.n M S K 16# F KnM KnS D W T C V Z S PLS M0 SET Y0.0 PLS M0 M0 is rising edge-triggered.