PAKISTAN SIEMENS PLC PROGRAMING Ladder logic ( LAD ) is one programming language used with PLCs . . .. Statement List ( STL ) – list of instructions . ... Function Block Diagram ( FBD ) – functional block diagram. Totally Integrated Automation Portal ( TIA Portal ) gives you unrestricted access to the complete range of digitalized automation services, from digital planning to integrated engineering and transparent operation. Wincc SCADA Graphic Designing. Wincc Flexiable HMI Graphic Designing. This is a listing of tutorials and manuals found on the Siemens automation website that will get you started on the SIMATIC Step 7 software for S7-300 and S7-400 and TIA portal systems. From a new users perspective I’ve only heard disparaging comments about finding the right information on the Siemens’ website. For More Information Visit My Page