SIMATIC STEP 7 Professional Software Update Service (SUS) Download for TIA Portal; within the framework of this contract, you will receive for one year all up-to-date software versions. the contract is extended automatically by 1 year if it is not canceled 3 months prior to expiration. Period of delivery and service: 1 year from date of invoice. Requirement for conclusion: current version of the software ******************************* E-mail address required for delivery