AS and OS expansions 
  7.4 Changes in the OS project 
Compendium Part D - Operation and Maintenance (V9.0) 
Operating Manual, 02/2018, A5E43228948-AA 
93 
The options for updating an operator station during operation, either with a delta download or 
with a series of complete downloads of a redundant OS, have already been described in the 
section titled "Changing projects in process mode" of the PCS 7 Compendium Part A.  
You can find information on the basics in the "SIMATIC Process Control System PCS 7 
Operator Station" (https://support.industry.siemens.com/cs/ww/en/view/109746516) manual.