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Setting the RTC through Modbus over IP

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  • MVP 2023

The RTC is stored in SI 30 - SI 33. System Integer (SI) addressing starts at 9000h and are standard 16-bit signed integers. If you have difficulty writing directly to SIs, then write to MIs and trigger a bit in your PLC program to Store Direct the MIs to SIs when you want to set your RTC.

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