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IEEE754 NaN and compare to NaN

Admin
Hi,
Good day!

Indusoft has support for the NaN definition from IEEE754, and to be able to compare with it. This is very useful, I am receiving NaN from my device in IEEE754 float format and Indusoft shows me 1.00000. This feature would not be serving me. Can it be enabled from somewhere? I also want to know if it is possible to compare with NaN, I did not find any function that is "isnan ()" for example.

Best Regards,

Fernando.
  • I am using the MAX31855K, and when the thermocoupla is not connected, or it is touching gnd, I am getting NaN, I can perfectly process a NaN in C ++. When sending it by modbus (I use freemodbus 1.6 which complies with Modbus Application Protocol v1.1a https://www.embedded-experts.at/en/freemodbus/). From Modbus Poll, I am getting a NaN correctly, but from Indusoft, I am getting 1.0000

    Regards,
    Fernando.