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IEEE754 NaN and compare to NaN

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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.
Parents
  • 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.
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  • 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.
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