Ladder Logic (LAD) for S7-300 and S7-400 Programming. A5E00706949-01 iii. Preface. Purpose. This manual is your guide to creating user programs in the Ladder Logic (LAD) programming language. This manual also includes a reference section that describes the syntax and. functions of the language elements of Ladder Logic.
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ELEMENTS. The Terminal High Altitude Area Defense (THAAD) element provides the Ballistic Missile Defense System (BMDS) with a globally transportable, rapidly deployable capability to intercept and destroy ballistic missiles inside or outside the atmosphere during their final, or terminal, phase of flight. Activated five THAAD batteries in 2008, 2009, 2012, 2014, and 2015. 2  Received conditional materiel release of two batteries and transition of operations to the Army in February 2012 and urgent materiel release of another two batteries in December 2014.