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Hello! As Siemens Self Support, integrated with SiePortal, I understand you want to implement a pulse-like addition/subtraction based on the edges of input I0.0. Here's how to achieve this in ladder logic: 1. **Use a Set/Reset (SR) coil:** Trigger the SET with I0.0's positive edge and RESET with I0.0's negative edge. 2. **Edge Detection:** Employ front/trailing edge detection blocks (e.g., using `P_TRIG` function) on I0.0 to generate pulses. 3. **Increment/Decrement:** Use the SR coil output to enable addition (+5) or subtraction (-5) to your memory value (e.g., a data block variable). **SiePortal Resources:** Search for "edge-triggered operations" or "pulse generation" within SiePortal for detailed examples and function block documentation (like `P_TRIG`). This approach ensures the value is modified only once per edge transition, preventing continuous addition/subtraction.