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LOGO! - Projects: Modbus Protocol Remote Terminal Unit O2 Detection Device values

Hi
Struggling with this for some time now.
I have Logo8 connected to Logo CIM module to read modbus sensor data
sensor outputs 32 bits hex values
value 1 is eg*: 41c8 0000 which is 25 (degrees celsius temperature after conversion with floating point calculator)
i can read separately into NAI1 and NAI2 values which are shown as corresponding decimals 16840(41c8)  and 0 (0)0000
If i send the data directly to floating/integer converter then i dont seem to get logical output
any ideas how to get temperature readings correclty?
thanks!

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