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
