Redundancy And Changes During Operation - Siemens SIMATIC ET 200SP HA System Manual

4.8

Redundancy and changes during operation

Introduction
This section describes the possibilities for increasing the availability of a plant with an IO device
based on the ET 200SP HA distributed I/O.
Basic redundancy configurations
You can increase the availability of the distributed I/O by implementing redundancy
configurations in the plant. Multiple redundancy configurations can be combined.
The figure below shows an example of some of the possible redundancy configurations:
1
①
Configuration Media redundancy
Brief information Use Media Redundancy Protocol
(MRP)
Configuration ex‐ Connection of the IO device via
ample: See sec‐ media redundancy (Page 47)
tion:
Figure 4-2 Redundancy configurations of the distributed I/O with ET 200SP HA
ET 200SP HA Distributed I/O system
System Manual, 08/2019, A5E39261167-AD
2
4.8 Redundancy and changes during operation
3
②
System redundancy
Connection via redundant media
(2 subnets) and/or redundant in‐
terface modules
Connection of the IO device via
system redundancy (Page 44)
Plant planning
3
Sensor
③
IO redundancy
Use of redundant I/O modules in
an IO device
IO redundancy (Page 49)
43