Siemens SIMATIC PCS 7 Function Manual

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Availability
The block diagram shows an example configuration with ET 200M without a fault.
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If a fault occurs in a maximum of one signal path per redundancy node (e.g. bus line
(bus = PROFIBUS DP) in the first redundancy node and an input module (SM) in the second
redundancy node), the overall system remains operable. The connected device continues to
supply data to the central device, which remains available. If any other component in the
redundancy chain fails, however, the complete system will fail.
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High availability solutions in PCS 7
4.1 Solutions for the I/O
High Availability Process Control Systems (V9.0)
Function Manual, 05/2017, A5E39221836-AA 39

Siemens SIMATIC PCS 7 Specifications

General

Brand	Siemens
Model	SIMATIC PCS 7
Category	Control Systems
Language	English