From version 1.0 onwards, the Software Loader supports advanced download methods for SIMATIC 1500 PLCs, similar to those used in the TIA Portal. One such method is the delta-download. This method significantly reduces the amount of data downloaded to the PLC by only downloading the parts of the ST program that have changed, rather than replacing the entire program. This is particularly useful during commissioning or when making small changes to a single line of code in a service-case.