Cycle and response times of the S7-1500R/H redundant system
5.5 Timetables for the RUN-Redundant system state
Cycle and response times
Function Manual, 10/2018, A5E03461504-AD
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Timetables for the RUN-Redundant system state
The following section describes the typical times of the CPUs of the S7-1500R/H redundant
system in the RUN-Redundant system state.
Update times of the process image partitions
The following table contains the times for estimating the typical update times of the process
image partitions.
Table 5- 3 Data for estimating the typical update time of the process image partitions
Update times of the CPUs in the RUN-Redundant system state
Basic load for
updating process
image partitions
63 μs 57 μs 13 μs
Copy time for
distributed I/O via
6.5 μs/word 6.5 μs/word 2.6 μs/word
A table of the update times of the CPUs in the RUN-Solo system state is available in section
Update time for process image partitions (Page 28).
Program execution time without interruptions
The user program has a certain runtime without interruptions. The runtime depends on the
number of operations that are executed in the user program.
The following table contains the typical durations of operations.
Table 5- 4 Duration of an operation
Program execution times of the CPUs in RUN-Redundant system state
80 ns 60 ns 4 ns
Word operations,
96 ns 72 ns 6 ns
Fixed-point arith-
128 ns 96 ns 6 ns
Floating-point
512 ns 384 ns 24 ns
A table of the program execution times of the CPUs in the RUN-Solo system state is
available in section User program execution time (Page 31).
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