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Most of the AKD drive’s parameters have a 32bit data size, but some parameters have a 64bit data size.  Modbus communication on the AKD drive uses registers of a 16bit data size.  So for a 64bit parameter, it takes four registers to send the data over Modbus.  There are many devices, including PLC’s, HMI’s, and PC programs that do not handle a 64bit data size.  So what can be done to read and write 64bit values when working with Modbus and a device that only supports 32bit values?

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