Arduino Modbus Master HELP PLEASE

If the weight indicator drops to negative numbers, the numbers with 65555 are displayed. - It would be better if it showed 0 in the sign. I hope if I calibrate the loadcell correctly - it will not drop to the signed numbers. My main purpose is to set two hc-05 bluetooth modules as master and slave and write the data in the rope type loadcell in the crane to the display below. If I cannot transfer the data in low to the Bluetooth module, I will bother you. Thank you very much for your help.