When you switch on the indicator, by default, the weight of the platform or crate on the load bars is automatically zeroed out.
In some circumstances you may want to turn this feature off. For example, if you are loading a wool bale over a period of time and, during the process, the indicator switches off to conserve power. In this case, you don’t want the scale to zero when you switch on to add another weight.
To turn off power up zero, go to the Settings > Weighing screen, and remove the tick in the Power Up Zero option.