Mohsen,
Welcome to the forum! The ADS1232 is 24 bit word length, and the code value that is output will depend on the value of the reference voltage you are using and the gain setting you are using. The formula for a single code (value of 1) is equal to 0.5*(Vref/Gain)/(2^23-1) and is expressed in volts. If you multiply that value times the result given from the ADS1232 you will receive the voltage output of your load cell.
Best regards,Bob B
Hi Bob
i use formula equal ADC_value/(1L<<24))*(5.0/128)
if negative voltage i read 19mV only