Reproducibility Of Delay And Watchdog Interrupts - Siemens SIMATIC S7-400H System Manual

S7-400 cycle and response times

19.10 Reproducibility of delay and watchdog interrupts

19.10 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 19- 15 Reproducibility of time-delay and cyclic interrupts of the CPUs
Module
CPU 412-5H stand-alone mode
CPU 412–5H redundant
CPU 414–5H stand-alone mode
CPU 414–5H redundant
CPU 416–5H stand-alone mode
CPU 416–5H redundant
CPU 417–5H stand-alone mode
CPU 417–5H 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.
382
Reproducibility
Time-delay interrupt
± 230 µs
± 430 µs
± 160 µs
± 280 µs
± 130 µs
± 230 µs
± 120 µs
± 200 µs
System Manual, 03/2012, A5E00267695-11
Cyclic interrupt
± 250 µs
± 520 µs
± 240 µs
± 280 µs
± 190 µs
± 210 µs
± 160 µs
± 180 µs
S7-400H