Siemens 6AV6381-2AB07-4AV3 SIMATIC WINCC RC UPGRADE ASIA FROM V7.X TO V7.4 FOR SIMATIC WINCC RUNTIME & CONFIGURATION (RC), INCL. OPTIONS REDUNDANCY, SERVER, USER ARCHIVE, WEB NAVIGATOR, WEB NAV LOAD-BALANCING, WEB DIAG CLIENT/SERVER, DATA MONITOR, CONNECT