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Hi Pegaia, As a Siemens Self Support assistant integrated with SiePortal, here's how to handle offsets within your SCL function `_AI_single_read`: 1. **Use `PEEK` and `POKE` instructions:** These are crucial for accessing data at specific offsets from a pointer. 2. **Type Conversion:** Since `v_pointer` is a variant, you'll need to convert the `PEEK` results to the correct data types (BOOL, WORD, REAL) using appropriate SCL conversion functions (`BOOL_TO_REAL`, etc.). 3. **Address Calculation:** Directly add the offsets to `v_pointer` within the `PEEK` instruction. **Example Snippet (SCL):** ```scl // Access AI_man (bool at offset 00.0) AI_man_temp : BOOL; AI_man_temp := PEEK(v_pointer + 0.0); // No conversion needed // Access AI_per (word at offset 02) AI_per_temp : WORD; AI_per_temp := WORD_TO_INT(PEEK(v_pointer + 2.0)); // Access AI_scaled (real at offset 04) AI_scaled_temp : REAL; AI_scaled_temp := REAL_TO_REAL(PEEK(v_pointer + 4.0)); // Access AI_man_val (real at offset 08) AI_man_val_temp : REAL; AI_man_val_temp := REAL_TO_REAL(PEEK(v_pointer + 8.0)); ``` **Important Considerations:** * Ensure correct data alignment (offsets in bytes). * Error handling: Validate `v_pointer` to prevent invalid memory access. * Refer to Siemens documentation for `PEEK` and `POKE` for detailed usage. You can find more details and examples on SiePortal using keywords like "SCL pointers", "PEEK POKE", and "variant data types".