SIMATIC PCS 7. software. Process Historian Server Redundancy V9.1 Single License for 2 installations R-SW. without SW. without docu. license key download. class A. 5 languages (de. en. fr. it. sp). executable in WIN Server 2019 for furtherinformation. see PCS 7 V9.1 Readme reference HW PC/PG ******************************* email address for delivery is absolutely essential