It is important when working with Modbus to establish the addressing conventions in the beginning before programming your Modbus Master ( i.e. PLC, HMI, etc. ) and understand how the master’s addressing convention correlates to the AKD drive’s Modbus addressing.
In general, regardless of data size the AKD Modbus parameters are reserved with either 32 bits or 64 bits of space.
For data <=32 ( one bit, 8 bits, 16 bits, 32 bits etc. ) 32 bits ( two consecutive 16bit words ) are reserved whether the data requires all of it or not.