Supplementary information
15.15 Cycle and response times of the CPU 410-5H
CPU 410-5H Process Automation
System Manual, 09/2014, A5E31622160-AB
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15.15.4
Response time
Definition of response time
The response time is the time from detecting an input signal to changing the output signal
associated with it.
Fluctuation range
The actual response time lies between the shortest and the longest response time. You must
always assume the longest response time when configuring your system.
The shortest and longest response times are analyzed below so that you can gain an
impression of the variation of the response time.
Factors
The response time depends on the cycle time and the following factors:
●
Delay of the inputs and outputs
●
Additional DP cycle times on the PROFIBUS DP network
●
Execution in the user program
Delay of inputs/outputs
Make allowances for the following module-specific delay times:
●
For digital inputs: the input delay time
●
For interrupt-capable digital inputs: the input delay time + internal preparation time
●
For digital outputs: negligible delay times
●
For relay outputs: typical delay times of 10 ms to 20 ms.
The delay of relay outputs depends on
the temperature and voltage, among other things.
●
For analog inputs: cycle time for analog input
●
For analog outputs: response time at analog outputs
For information on delay times, refer to the technical specifications of the signal modules.
