Reproducibility Of Delay And Watchdog Interrupts - Siemens SIMATIC PCS 7 System Manual

16.15.9

Reproducibility of delay and watchdog interrupts

Definition of "reproducibility"
Time-delay interrupt:
The period that expires between the call of the first operation in the interrupt OB and the
programmed time of interrupt.
Cyclic interrupt:
The fluctuation range of the interval between two successive calls, measured between the
respective initial operations of the interrupt OB.
Reproducibility
The following table contains the reproducibility of time-delay and cyclic interrupts of the
CPUs.
Table 16- 20 Reproducibility of time-delay and cyclic interrupts of the CPUs
Module
CPU 410-5H stand-alone mode
CPU 410-5H redundant
These times only apply if the interrupt can actually be executed at this time and if it is not
delayed, for example, by higher-priority interrupts or queued interrupts of equal priority.
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
Reproducibility
Time-delay interrupt
± 120 µs
± 200 µs
Supplementary information
Cyclic interrupt
± 160 µs
± 180 µs
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