SIEMENS
2/629
Siemens IK PI · 2015
PROFINET/Industrial Ethernet
Communication for PC-based systems
S7 OPC Redundancy for Industrial Ethernet
2
■
Overview
OPC (
O
penness,
P
roductivity &
C
ollaboration) is a standard-
ized, open, and vendor-independent interface that is widely
used in automation. OPC UA (
U
nified
A
rchitecture) is the result
of consistent further development of this standard, offering
additional functions such as security or redundancy.
S7 OPC Redundancy is a software product compliant with the
OPC UA standard that enables the redundant configuration of
OPC UA servers to SIMATIC S7. The availability of automation
data to operator control and monitoring systems is guaranteed
thanks to the redundant use of OPC UA servers. This requires
neither additional cabling for synchronizing the redundant
OPC UA servers, nor additional programming overhead in
the PC. The OPC UA servers are synchronized via high-perfor-
mance Industrial Ethernet network access points at 10/100
and
1
000
Mpbs. S7 OPC Redundancy represents an integrated
customer solution for all SIMATIC NET S7 SOFTNET and
HARDNET software products in the automation world.
■
Benefits
•
Enhanced plant availability thanks to redundant OPC UA
servers that ensure plant access for operator control and
monitoring systems
•
Secures investments thanks to the use of existing applications
(OPC clients) and flexible application options, regardless of
the SIMATIC S7 controller used
•
Improved utilization of IT resources thanks to even distribution
of the OPC clients among the redundant OPC servers
■
Application
The redundant OPC UA server software enables redundant
configuration of SIMATIC NET OPC UA servers. Failure of one
OPC UA server, as a result of power outage or system failure, for
example, results in immediate use of the other OPC UA server,
and continuation of the existing OPC UA client connection.
This ensures increased availability of automation data to opera-
tor control and monitoring systems.
■
Design
Redundant use of OPC servers
A redundant OPC UA server system comprises the following:
Server PC
with
•
Operating system for Windows server
•
SOFTNET-IE S7 or HARDNET-IE S7 software based on
OPC UA server
•
S7 OPC Redundancy software
The redundant operation of up to two OPC UA servers is
possible.
Client PC (HMI)
•
Software for OPC clients that supports OPC UA
(incl. reconnect functionalities in accordance with OPC UA
specification)
The communication parameters are configured using STEP 7 or
SIMATIC NET NCM PC. A configuration tool is included in the
scope of delivery of the corresponding packages.
OPC UA
synchronization
HMI
S7 OPC redundancy
S7 OPC redundancy
G_IK10_XX_10295
PROFIBUS
Industrial Ethernet
Industrial Ethernet
Station B
Station A
© Siemens AG 2014