Siemens Simatic S7-1500H - Page 199

4.
Apply or assign a virtual MAC address to the systemIP address.
The virtual MAC address is 6 bytes long. The assignment of the bytes is hexadecimal.
NOTE
Virtual MAC address
Ensure that all MAC addresses stored in the Ethernet broadcast domain are unique. This
applies in particular to systems with third-party devices consisting of VRRP and redundant
systems that are configured through several STEP7 projects.
5.
The other CPU applies the settings automatically.
Figure 8-4SystemIP address
You can find more information on the systemIP address in the Communication function
manual (https://support.industry.siemens.com/cs/ww/en/view/59192925).
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
Set cycle time high
Select the maximum cycle time as high as your process allows.
• 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 and recommendations for parameterization
of the maximum cycle time and the minimum cycle time in the Cycle and response times
function manual (https://support.industry.siemens.com/cs/at/fr/view/59193558).
You can find information on system states in the section Operating and system states (Page
263).
199
Configuration
8.2 Configuring R/H CPUs
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD