Siemens SIMATIC S7-1500R/H Manual - Página 14
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Product overview
3.3 Hardware properties
NOTE
Standard rail adapter
You mount the CPUs on a standardized 35 mm rail using the standard rail adapter.
You will find information on mounting the standard rail adapter in the S7‑1500R/H redundant
system (https://support.industry.siemens.com/cs/ww/en/view/109754833) System Manual.
Principle of operation
One of the two CPUs in the redundant system takes on the role of CPU for process control
(primary CPU). The other CPU takes on the role of the following CPU (backup CPU). The
assigned role of the CPUs can change during operation. Synchronization of all relevant data
between primary CPU and backup CPU ensures fast switching between CPUs in the event of a
primary CPU failure. If the primary CPU fails, the backup CPU retains control of the process as
the new primary CPU at the point of interruption.
The redundancy connections are the PROFINET ring with MRP. The CPUs are synchronized via
a PROFINET ring.
Additional information
You can find a detailed description of the operation and design of the CPUs in the system
manual Redundant System S7‑1500R/H
(https://support.industry.siemens.com/cs/ww/en/view/109754833).
3.3
Hardware properties
Article number
6ES7515-2RN03-0AB0
14
CPU 1515R-2 PN (6ES7515-2RN03-0AB0)
Equipment Manual, 11/2022, A5E42009914-AD