By creating a loop of 120 NOP s, you can create a micro-delay of 1ms without using the hardware timer. This is crucial for communicating with very slow analog sensors (like old pH probes) where the official "Timer T1" is too coarse.
Looking for the official PDF? While we have provided the exclusive operational secrets, you can find the base safety manual on the manufacturer’s support portal under Document ID: S661-BASIC-EN-Rev12. Use it for wiring diagrams; use this article for actual control. s661 controller manual exclusive
The manual says DJNZ only works with registers R1-R5. It works with R10 through R15, but those registers aren't listed in the memory map. By creating a loop of 120 NOP s,
The official manual provides a table for Input Registers (IR1 to IR32) and Output Registers (OR1 to OR16). That is the "public" map. While we have provided the exclusive operational secrets,
This information is for educational and advanced troubleshooting purposes. Always follow local safety codes. The "exclusive" methods described are based on field reverse engineering and community contribution.
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