SIMATIC S7, S7 PLCSIM Software Update Service 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 Simulation systems can effectively support the development of programs and their subsequent productive use. In the automation world, a simulated test environment, including the controller and process, reduces the commissioning times and thus reduces costs. Through early detection of programming errors and early optimization of program sections, the programs are already error-free and optimized when used on the plant. If there are program changes, it is possible to test the program before it is loaded into the plant controller. PLCSIM is a fundamental part of STEP 7 Professional (TIA Portal).