Features For The Configuration Phase - Siemens SIMATIC PCS 7 Function Manual

Basics of Fault Tolerance
2.6 Features for the commissioning and operation phases
Basics of increased availability
Increased availability in PCS 7 is based on the following principles:
● Duplication of a component
● Duplication of a component and a software component that performs an automatic failover
● Technical solutions for configuring components that prevent the failure of a sub-component.
2.5

Features for the configuration phase

Features for the configuration phase
In the configuration phase, PCS 7 provides you with support with the following features.
Feature
Fault prevention through simplified
configuration of the various components
Simple integration of redundant I/O
The communication links between the
system components are configured
transparent to the application.
2.6 Features for the commissioning and operation phases
Features for the commissioning and operation phases
The following table lists the features PCS 7 offers for the commissioning and operation phases.
The redundant components allows the continuation of the process of a component fails.
Operator control and monitoring of the process remains unaffected. In addition, the archiving
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Example:
Use of duplicate signal modules
from active and passive components when a fault occurs.
Example of redundant components:
A signal is acquired with two signal modules and the redundancy software. The failure of
one module remains non-critical for operation of the plant.
Example:
Configuration of a network in a ring structure with a component as redundancy manager.
If part of the ring is disrupted (by a defective cable, for example), the operation of the network
is maintained.
Meaning
You do not need additional training to configure the
redundant components. Configuration can be
performed in a similar way as for standard systems.
No special knowledge is needed about redundant I/O
modules.
With the HW Config or NetPro graphical user interface,
the configuration of the communication links is
performed transparent to the application.
Fault-tolerant Process Control Systems (V8.0)
Function Manual, 03/2012, A5E02779471-02