SIEMENS
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Siemens IK PI · 2015
PROFINET/Industrial Ethernet
SIMATIC PCS 7 process control systems
Fault-tolerant automation systems
2
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Overview
Redundancy Station AS 410H
Fault-tolerant automation systems are used to reduce the risk of
production failures. The higher investment costs for fault-tolerant
automation systems are frequently negligible compared to the
costs resulting from production failures. The higher the costs of
a production failure, the more worthwhile it is to use a fault-
tolerant system.
The SIMATIC PCS 7 fault-tolerant automation systems can be
used on their own in a plant configuration, or together with
standard and safety-related automation systems.
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Design
The AS 410H, which consists of two redundant, galvanically
isolated subsystems, can be mounted on a UR2-H compact rack
with a split backplane bus or on two separate racks (UR1 or
UR2). The configuration in two racks has the advantage that the
redundant subsystems are spatially separated (for example, by
a fire-proof wall) and can be located far apart from each other.
Depending on the sync modules used, distances from 10 m to
10 km are possible between the two subsystems. As a result of
the electrical isolation, the system is also resistant to EMC
interference.
Individual configuration of AS bundles
The equipment of the high availability automation systems as
well as their article numbers can be individually defined by se-
lecting pre-configured ordering units.
Typical combinations can be selected from tables in the section
"Ordering data". The complete range for selection is available via
the SIMATIC PCS 7 AS 410 Redundancy Station online configu-
rator in the Industry Mall (
www.siemens.com/industrymall
).
Ordering information:
•
For an AS 410H redundant configuration based on two
AS Single Stations (AS 410S), you additionally require 4 sync
modules (up to 10 m or up to 10 km) and 2 fiber-optic sync
cables. The selection depends on the distance between the
two AS Single Stations.
•
FO sync cables longer than 1 m must always be ordered
separately (2 cables required in each case).
I/O connection via PROFIBUS DP
The distributed process I/O can be integrated into a
PROFIBUS DP segment either directly or via a lower-level field-
bus (PROFIBUS PA or FOUNDATION Fieldbus H1).
Several PROFIBUS DP segments with distributed process I/Os
can be operated on an AS 410H high availability automation
system. A PROFIBUS DP interface is integrated in each of the
two CPUs 410-5H Process Automation. Using the online config-
urator in the Industry Mall or in the selection and ordering data,
up to four more PROFIBUS DP interfaces can be configured for
each redundant subsystem with add-on CP 443-5
PROFIBUS DP interfaces (conformal coating).
With redundant PROFIBUS DP lines, the process I/Os can be
connected to an AS 410H as follows:
•
ET 200M remote I/Os stations with two IM 153-2 High Feature
interface modules on a special bus module
•
ET 200iSP remote I/Os stations with two IM 152-1 on a special
terminal module
•
Field devices on the PROFIBUS PA over a PA link to two
redundant IM 153-2 High Feature interface modules
•
Field devices on the FOUNDATION Fieldbus H1 via an FF link
with two redundant IM 153-2 FF interface modules
•
Non-redundant PROFIBUS DP devices, e.g. ET 200S or
ET 200pro remote I/O stations per Y-Link
I/O connection via PROFINET IO
High availability AS 410H automation systems can be con-
nected via PROFINET IO with remote I/O stations, for example,
ET 200M remote I/O stations. Only the PROFINET interfaces
integrated in the CPUs can be used for this on the automation
system.
The maximum availability with minimum error reaction times is
achieved by the AS 410H when used in conjunction with system
redundancy of the I/O devices. System redundancy refers to a
type of PROFINET IO communication in which each I/O device
establishes a communication link to each of the two CPUs of an
AS 410H over the topological network. Then, the failure of a CPU
does not automatically lead to failure of the connected I/O
devices.
PROFINET IO communication with system redundancy
AS redundancy
station with
PROFINET CPU
SCALANCE X
G_PCS7_XX_00322
ET 200M
ET 200M
ET 200M
ET 200M
© Siemens AG 2014