Modbus, send REAL data

Giamba

Hi,
I have some real values to send via modbus from Mervis.
Since REAL take 4 bytes, REAL should take two registers.
How can I combine the two registers values to make one real value in C program ?

regards.

Giamba

I find it!

Modbus data order: 1234.
Example:
In C program header:

typedef unsigned long DWORD;
typedef unsigned short WORD;
union u_DWORD_TO_FLOAT{
    DWORD i;
    float f;
};

and in the code:

union u_DWORD_TO_FLOAT AI01;
...
AI01.i = (mb_mapping->tab_registers[20] << 16) + mb_mapping->tab_registers[21];
float value = AI01.f;

Hope this help someone !