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Updated PM8000 Modbus register list?

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Is there an updated Modbus register list for the PM8000 firmware v1.4.1? I have a custom framework built on v1.1.0 with Modbus Slave modules using the 4x116-150 range. When I try to load the framework on an updated meter, one of the modules is left offline because of a register conflict that doesn't show up on PM8000_Modbus_Map.xlsx.

Has this document been updated? Alternately, is there a block of registers that is "future-proof" and will not be used by the firmware?

Thanks!