Siemens Simatic S7-1500R System Manual page 141

Configuration
6.2 Configuration procedure
4. Setting the cycle monitoring time
STEP 7 assigns default values for the minimum and maximum cycle times.
The default values are displayed in the "Cycle" area of the CPU properties.
Note
Setting as long as possible a cycle time
Select as long a maximum cycle time as your process will allow.
• The time for the ongoing synchronization of the two CPUs in redundant operation is
included in the cycle time.
• A temporary increase in the cycle time can occur upon a system state transition SYNCUP
→ RUN-Redundant.
If only one CPU controls the process (RUN-Solo system state), the cycle time is significantly
shorter than during redundant operation.
You can find more information on the cycle time in the Cycle and response times function
manual (http://support.automation.siemens.com/WW/view/en/59193558).
You can find information on system states in the section Operating and system states
(Page 197).
5. Creating IO devices
In the example, you add two IO devices with system redundancy S2 to the R-CPUs. To do
so, proceed as follows:
1. Switch to the network view.
2. Drag the interface module IM 155-5 PN HF to the task window as an IO device from the
hardware catalog.
3. Drag the required modules to the corresponding slots in the IO device.
4. Select the second IO device, IM 155-6 PN HF, in exactly the same way.
5. Assign the required modules.
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S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA