Siemens SIMATIC S7-400H System Manual page 374

S7-400 cycle and response times
19.5 Response time
Table 19- 11 Direct access of the CPUs to I/O modules in the expansion unit with local link
Access mode 412-5H
stand-
alone
mode
Read byte 6.0 µs
Read word 11.0 µs
Read double 20.0 µs
word
Write byte 5.3 µs
Write word 10.6 µs
Write double 19.8 µs
word
Table 19- 12 Direct access of the CPUs to I/O modules in the expansion unit with remote link, setting 100 m
Access mode 412-5H
stand-
alone
mode
Read byte 11.5 µs
Read word 23.0 µs
Read double 46.0 µs
word
Write byte 11.0 µs
Write word 22.0 µs
Write double 44.5 µs
word
Note
You can also achieve fast response times by using hardware interrupts; see section Interrupt
response time (Page 379).
374
412-5H 414–5H
redundant stand-
alone
mode
36.0 µs 5.6 µs
41.3 µs 10.5 µs
49.0 µs 19.9 µs
35.3 µs 5.3 µs
41.3 µs 10.2 µs
49.0 µs 19.8 µs
412-5H 414–5H
redundant stand-
alone
mode
41.3 µs 11.5 µs
49.0 µs 23.0 µs
72.1 µs 46.0 µs
41.3 µs 11.0 µs
49.0 µs 22.0 µs
72.1 µs 44.5 µs
414–5H 416-5H
redundant stand-
alone
mode
24.5 µs 5.6 µs
32.1 µs 10.5 µs
40.0 µs 19.9 µs
5.3 µs
24.5 µs
28.6 µs 10.2 µs
39.8 µs 19.8 µs
414–5H 416-5H
redundant stand-
alone
mode
27.5 µs 11.4 µs
39.8 µs 22.8 µs
62.9 µs 45.9 µs
10.8 µs
27.0 µs
39.8 µs 21.9 µs
62.9 µs 44.0 µs
416-5H 417–5H
redundant stand-
alone
mode
16.1 µs 5.6 µs
23.8 µs 10.5 µs
31.7 µs 19.9 µs
16.1 µs 5.3 µs
21.5 µs 10.2 µs
31.5 µs 19.8 µs
416-5H 417–5H
redundant Einzel-
betrieb
20.3 µs 11.3 µs
31.5 µs 22.8 µs
54.5 µs 45.9 µs
20.2 µs 10.8 µs
31.5 µs 21.9 µs
54.5 µs 44.0 µs
System Manual, 03/2012, A5E00267695-11
417–5H
redundant
13.4 µs
18.6 µs
28.7 µs
13.4 µs
18.3 µs
28.0 µs
417–5H
redundant
17.0 µs
28.6 µs
51.7 µs
16.8 µs
27.8 µs
50.0 ms
S7-400H