Opto22 Ultimate I/O and NI Lookout with Modbus tcp/ip Oct 28, 2002 12:39 pm, by Farzad Hemati Subject : HMI Text : I have to develop an application in National Instruments HMI (Lookout) communication with Opto 22 s controller (Ultimate I/O modbus tcp/ip). How would we define the addresses for data members in Lookout for reading/writing floats and integers. For example we have a floate at address F0D8 2118 (in Opto 22 memory pad) what data member shall be defined in National Instruments Lookout to read this data? Reply -------------------------------------------------------------------------------- Re: Opto22 Ultimate I/O and NI Lookout with Modbus tcp/ip Nov 6, 2002 1:33 pm, by Anonymous WebconfigPages from Opto have a utility(ModbusAddresConvert.htm) that converts between mem map address and modbus adrresses, it is documented in the SNAP Ultimate I/O Alternate Programming Methods Guide. Reply