Table 16-7 Operating System Execution Time At The Scan Cycle Checkpoint - Siemens SIMATIC S7-400H System Manual

Operating system execution time at the scan cycle checkpoint
The table below shows the operating system execution time at the cycle checkpoint of the
CPUs.
Table 16-7 Operating system execution time at the scan cycle checkpoint
Sequence 412-3H
stand-alone
mode
Cycle control 271-784 µs
at the SCCP
∅ 284 µs
Cycle time extension due to nested interrupts
Table 16-8 Cycle time extension due to nested interrupts
CPU Process
interrupt
CPU 412-3 H 481 µs
stand-alone
mode
CPU 412-3 H 997 µs
redundant mode
CPU 414–4 315 µs
stand-alone
mode
CPU 414–4 H 637 µs
redundant mode
CPU 417-4 160 µs
stand-alone
mode
CPU 417-4 H 348 µs
redundant mode
Add the program execution time at interrupt level to this extension value.
The corresponding times are added together if the program contains nested interrupts.
S7-400H
System Manual, 09/2007, A5E00267695-03
412-3H 414-4H
redundant stand-alone
mode
679-1890 µs 198-553 µs
∅ 790 µs ∅ 204 µs
Diagnostic Time-of- day
interrupt interrupt
488 µs 526 µs
843 µs 834 µs
326 µs 329 µs
539 µs 588 µs
184 µs 101 µs
317 µs 278 µs
414-4H redundant 417-4H
548-1417 µs
∅ 609 µs
Delay interrupt Watchdog
interrupt
312 µs 333 µs
680 µs 674 µs
193 µs 189 µs
433 µs 428 µs
82 µs 120 µs
270 µs 218 µs
S7-400 cycle and reaction times
16.2 Calculating the cycle time
417-4H
stand-alone mode redundant
83 - 315 µs 253 - 679 µs
∅ 85 µs ∅ 270 µs
Programming / I/O Asynchronous
access error error
142 µs / 134 µs 301 µs
427 µs / 179 µs 832 µs
89 µs / 85 µs 176 µs
272 µs / 114 µs 252 µs
36 µs / 35 µs 90 µs
121 µs / 49 µs 115 µs
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