DVP-ES3 Series Programming Manual Symbol Explanation 1. When the value in the accumulative register switches from 0 to 1, the NP instruction keeps the value 1 in the accumulative register for a scan cycle. After the second scan cycle is finished, the value in the accumulative register changes to 0. 2. Use the FB_NP instruction in function blocks. Example Instruction Operation _5 LD M0 Contact A of M0 is loaded. AND M1 Contact A of M1 is connected in series. NP The circuit is rising edge-triggered. OUT M20 The coil M20 is driven. Timing diagram M0 M1 M0 M1 M20 Y 0.0 One scan cycle One scan cycle 5-18 Instruction code Operand Function NP - Triggering the circuit on the rising edge.