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Modbus queries / responses

Modbus queries have the starting address, but the responses do not. Yet Wireshark lists the address es in the Modbus response. Does Wireshark 'assume' this address from the previous query ? I am having Modbus data values 'swapped' - volts being returned with the value for the amps, and amps returned with the value of volts. The issue is random & may not occur for several days at a time. Thanks Steve Hargraves