Siemens SIMATIC PCS 7 CPU 410-5H System Manual page 302

Supplementary information
15.15 Cycle and response times of the CPU 410-5H
Portions
G Per submodule with 32 bytes of consistent data for the inte-
grated PROFINET IO interface
In the case of I/O inserted into the central controller or expansion device,
*)
the specified value includes the execution time for the I/O module
The module data is updated with the minimum number of accesses.
(example: 8 bytes result in 2 double word accesses; 16 bytes in 4 double word accesses.)
Measured with IM460-3 and IM461-3 at a link length of 100 m
**)
Measured with modules with 1 byte of user data, e.g., DI 16.
***)
Extending the cycle time
The calculated cycle time of a S7-400H CPU must be multiplied by a CPU-specific factor.
The table below lists these factors:
Table 15- 12 Extending the cycle time
Startup
Factor
Long synchronization cables may increase cycle times. This extension can have the factor 2
- 5 with a cable length of 10 km.
Operating system execution time at the cycle control point
The table below shows the operating system execution time at the cycle checkpoint of the
CPUs.
Table 15- 13 Operating system execution time at the cycle control point
Sequence
Cycle control at the SCCP
302
CPU 410-5H stand-alone mode
1.05
CPU 410-5H stand-alone mode
25 - 330 µs
∅ 30 µs
CPU 410-5H
stand-alone mode
8 µs
CPU 410-5H redundant
1.2
CPU 410-5H redundant
120 - 600 µs
∅ 135 µs
CPU 410-5H Process Automation
System Manual, 09/2014, A5E31622160-AB
CPU 410-5H
redundant
30 µs