How To Configure The Redundancy For Hart Field Devices - Siemens SIMATIC PCS 7 Function Manual

Advantages of fault-tolerant components
4.4 Distributed I/O
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4.4.4

How to configure the redundancy for HART field devices

HART field devices can be configured with redundant modules. HART field devices can only
be redundant, if they are configured separately, for example, by a 1 of 2 selection.
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STEP 7
Process Control System PCS 7; PCS 7 - Released Modules
Automation System S7-400H; Fault-tolerant Systems
Fault-tolerant Process Control Systems (V8.0)
Function Manual, 03/2012, A5E02779471-02