Communication; System And Device Ip Addresses - Siemens Simatic S7-1500R System Manual

Reference
You can find additional information on the trace function in the section Test functions
(Page 282) and in the Using the trace and logic analyzer function manual
(http://support.automation.siemens.com/WW/view/en/64897128).
2.4

Communication

2.4.1

System and device IP addresses

Device IP addresses
For the interfaces of the CPUs and the IO devices to be accessible, the interfaces require IP
addresses that are unique within the network (device IP addresses).
MAC addresses
The CPUs have a unique MAC address for each interface and its ports. The MAC addresses
of the PROFINET ports are needed for the LLDP protocol, for example for the neighborhood
discovery function.
The number range of the MAC addresses is sequential. The first and last MAC addresses
are printed on the rating plate on the right-hand side of each CPU.
System IP addresses
In addition to the device IP addresses of the CPUs, the redundant system S7-1500R/H
supports system IP addresses:
● System IP address for the X1 PROFINET interfaces of the two CPUs (system IP address
X1)
● System IP address for the X2 PROFINET interfaces of the two CPUs (system IP address
X2)
You use the system IP addresses for communication with other devices (for example, HMI
devices, CPUs, PG/PC). The devices always communicate over the system IP address with
the primary CPU of the redundant system. This ensures that the communication partner can
communicate with the new primary CPU (previously backup CPU) in the RUN-Solo system
state after failure of the original primary CPU in redundant operation.
There is a virtual MAC address for each system IP address. The virtual MAC addresses of
the two PROFINET interfaces must be different from each other.
You enable the system IP addresses in STEP 7.
You can find information on configuring the system IP addresses and the virtual MAC
addresses in the section Configuration procedure (Page 136).
S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA
System overview
2.4 Communication
43