Calculating The Cycle Time - Siemens SIMATIC PCS 7 System Manual

Elements of the cycle time
Figure 16-27 Elements and composition of the cycle time
16.15.2

Calculating the cycle time

Extending the cycle time
The cycle time of a user program is extended by the factors outlined below:
● Time-based interrupt processing
● Hardware interrupt processing (see also Chapter Interrupt response time (Page 304))
● Diagnostics and error processing (see also Chapter Example of calculation of the
interrupt response time (Page 306))
● Communication via the integrated PROFINET IO interface and CPs connected by means
of the communication bus
(e.g.: Ethernet, Profibus, DP) as a factor in communication load
● Special functions such as monitoring and modifying variables
or the block status
● Transfer and deletion of blocks, compressing of the user program memory
● Runtime of signals using the synchronization cable
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 09/2014, A5E32631667-AB
16.15 Cycle and response times of the CPU 410-5H
Supplementary information
289