Summary Of Response Time With Cyclic And Time-Controlled Program Execution - Siemens Simatic S7-1500 Function Manual

Reference
The following links provide additional information:
● Application example for determining the response time for PROFINET
(http://support.automation.siemens.com/WW/view/en/21869080)
● Transmission times and isochronous mode in function manual PROFINET with STEP 7
V15 (http://support.automation.siemens.com/WW/view/en/49948856); see also the
section "Tips on assembly"
● Transmission times and isochronous mode in function manual PROFIBUS with STEP 7
V15 (http://support.automation.siemens.com/WW/view/en/59193579); see also the
section "Network settings"
● Delays at the input or output of the modules can be found in the manual for the respective
device.
● Information on device-internal delays can be found in the manuals for the ET 200MP and
ET 200SP distributed I/O systems.
3.5 Summary of response time with cyclic and time-controlled program
execution
Estimation of the shortest and longest response time
The following formulas may be used to estimate the shortest and longest response time:
Estimation of the shortest response time
The shortest response time is the sum of:
1 x delay of the input/output module for inputs
+ 1 x (update PROFINET IO or PROFIBUS DP)*; (update time of the backplane bus for the
ET 200SP CPUs)
+ 1 x transfer time of the process image input
+ 1 x execution of the user program
+ 1 x transfer time of the process image output
+ 1 x (update PROFINET IO or PROFIBUS DP)*; (update time of the backplane bus for the
ET 200SP CPUs)
+ 1 x delay of the input/output module for outputs
_________________________________________________________________________________
= Shortest response time
* Time is dependent on the configuration and the extent of the network.
The shortest response time is equivalent to the sum of the cycle time plus the input and
output delay times.
Cycle and response times
Function Manual, 10/2018, A5E03461504-AD

3.5 Summary of response time with cyclic and time-controlled program execution

Cyclic program execution
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