Application planning
Observe the following rules for configuring the IO devices:
MRP must be enabled for ring configurations. All nodes of the ring are in an MRP domain.
Configuration (see figure
under Configuration)
① Media redundancy (1 subnet ring) ② Media redundancy + System re‐
dundancy (1 subnet ring)
Coupling
Hardware IO device with 1 interface module
Mounting rule No special considerations
Subnet configuration Each node is connected to two other
nodes in a ring configuration.
The PROFINET IO system begins
and ends at an IO controller.
Each node is connected to two other
nodes in a ring configuration.
Configuration in HW Con‐
fig
The IO controller must be configured
as an MRP manager
The MRP parameter assignment
must be completed. If a PROFINET
IO system is created at each PN-IO
connection of the CPU, a newly in‐
serted interface module is automati‐
cally connected to the PROFINET IO
system of the CPU.
Node name The nodes on the fieldbus (PROFINET IO) must be assigned unique names.
Network connections (ex‐
ample):
Network1:
CPU (0) X5 port 1 +
CPU (0) X5 port 2
Network1:
CPU (0) X5 port 1 +
CPU (1) X5 port 1
Connection
CPU (0) X5 port 2 with CPU (1) X5
port 2
Application planning
Observe the following rule for installing the IO devices:
The IO devices must be configured in a ring structure.
Response to failure
If the ring structure is interrupted, the following applies:
The IO devices continue to be available in the system.
Maintenance and service
One of the following functions is possible in runtime:
● Connecting and removing IO devices
● Replacing PROFINET cables
Plant planning
4.8 Redundancy and changes during operation
ET 200SP HA Distributed I/O system
48 System Manual, 08/2019, A5E39261167-AD
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