Compiling and downloading PLC programs This section contains information on the following topics:Basics for compiling and downloading PLC programsCompiling blocksDownloading blocks for S7-1200/1500 (S7-1200, S7-1500, S7-1200 G2)Downloading blocks for S7-300/400 (S7-300, S7-400)Downloading PLC tags (S7-1200, S7-1500, S7-1200 G2)