Cycle and reaction times 
  5.4 Calculating method for calculating the cycle/response time 
CPU 31xC and CPU 31x, Technical Data 
Manual, 01/2006 Edition, A5E00105475-06 
5-19 
Response time 
Table 5-12  Calculating the response time 
Shortest response time  Longest response time 
-  Multiply the physical cycle time by factor 2. 
Now add I/O delay.  Now add the I/O delay plus the DP cycle times on 
PROFIBUS-DP or the PROFINET IO update 
times. 
The result is the shortest response time.  The result is the longest response time. 
 
See also 
Longest response time (Page 5-16) 
Shortest response time (Page 5-15) 
Calculating the cycle time (Page 5-4) 
Cycle extension through Component Based Automation (CBA) (Page 5-10)