Supplementary information   
18.13 Link-up and update sequence 
  CPU 410 Process Automation/CPU 410 SMART 
350  System Manual, 05/2017, A5E31622160-AC 
Communication functions and resulting jobs  
After it has received one of the jobs specified below, the CPU must in turn generate 
communication jobs and output them to other modules. These include, for example, jobs for 
reading or writing parameterization data records from/to distributed I/O modules. These jobs 
are rejected until the update is completed. 
●  Reading/writing of data records using HMI functions 
●  Reading data records using SSL information 
●  Disabling and enabling messages 
●  Logon and logoff for messages 
●  Acknowledgement of messages 
 
Note 
The last three of the functions listed are registered by a WinCC system, and automatically 
repeated when the update is completed.