SIMATIC S7, F PROGRAMMING TOOL STEP 7 SAFETY ADVANCED, SOFTWARE UPDATE SERVICE DOWNLD WITHIN THE FRAMEWORK OF THIS CONTRACT, YOU WILL RECEIVE UPDATED SOFTWARE VERSIONS FOR A PERIOD OF ONE YEAR. EXTENDED BY ANOTHER YEAR, IF IT IS NOT CANCELED THREE MONTHS PRIOR TO ITS EXPIRATION. PERIOD OF DELIVERY AND PERFORMANCE: 1 YEAR FROM DATE OF INVOICE. PREREQUISITE FOR CONTRACT: CURRENT VERSION OF THE SOFTWARE ******************************* E-MAIL ADDRESS IS MANDATORY FOR DELIVERY