MHI Develops "DIASYS Netmation 4S" Control System Complying with

MHI Develops "DIASYS Netmation 4S" Control System Complying with IEC 61508
(2010) (SIL3) International Standards On Functional Safety 
Tokyo, Aug 27, 2013 - (JCN Newswire) -  Mitsubishi Heavy Industries, Ltd. (MHI)
has completed development of the DIASYS Netmation 4S, a control system
complying with IEC 61508 (2010) (SIL3) international functional safety
standards. Developed for monitoring and control of thermal power generation
plants and other facilities, the DIASYS Netmation 4S is one of only a few
examples - and the first in Japan - of products to satisfy the stringent
hardware and software requirements of IEC 61508 (2010) guidelines in terms of
both "control and protection" functions. Certification was acquired
from the third-party international testing and certification organization TUV
SUD, based in Germany. After receiving formal recognition of the DIASYS
Netmation 4S's world-leading reliability, MHI now plans to proceed toward
inaugurating shipments of the new system from spring 2014. 
The newly developed DIASYS Netmation 4S represents the newest model in the
DIASYS Series of control systems launched by MHI in the 1980s. To date more
than 5,000 units of earlier models have been delivered for applications in the
company's own gas and steam turbines, boilers and other power generation
equipment as well as in diverse infrastructure products and industrial
facilities. In earlier systems the circuitry for protecting key large-scale
machines was installed separately inside a dedicated control system; but in the
DIASYS Netmation 4S such circuitry can be installed together with general
control circuitry, a feature that makes it possible to create arithmetic
circuits involving approximately 200 different function elements. As a
configuration of up to four arithmetic logical units is possible, outstanding
safety, operability and ease of maintenance are achieved. A large capacity that
enables processing of a maximum 90,000 input/output signals, combined with high
processing speed as fast as 1 millisecond (msec), enables the DIASYS Netmation
4S to accommodate a wider range of products and machines than preceding
The certification received for the new system, IEC 61508 (2010), is the second
edition of standards initially introduced in 2000; it includes newly added
requirements pertaining to design and development management systems, software
and security. 
IEC 61508 is the global standard relating to functional safety. Today its
range of applications is broad, including not only plants of all kinds but also
automobiles, railways, aircraft and factory automation. IEC 61508 also forms
the basis of ISO 26262 automotive safety standards, etc. Under IEC 61508
guidelines, machine hardware and software reliability is evaluated according to
the "SIL" (safety integrity level) index. SIL3 is the highest level
of safety sought from thermal power generation, chemical, environmental and
other plants. 
In addition to acquiring IEC 61508 certification, the DIASYS Netmation 4S has
also received IEC 62061 and EN ISO 13849 certification applied to functional
safety of machines. It was also among the first systems qualifying for IEC
61131-6 certification, a new standard introduced in 2012 for the functional
safety of controller units. The DIASYS Netmation 4S is the first system in the
world to receive IEC 61131-6 certification in the field of power plant control
Ahead of the commencement of shipments next spring, in November the DIASYS
Netmation 4S will be shown at System Control Fair 2013 to be held at Tokyo Big
Sight in Ariake, Tokyo. 
About Mitsubishi Heavy Industries 
Mitsubishi Heavy Industries, Ltd. (MHI), headquartered in Tokyo, Japan, is one
of the world's leading heavy machinery manufacturers, with consolidated
sales of 2,820.9 billion for the year ended March 31, 2012. MHI's diverse
lineup of products and services encompasses shipbuilding, power plants,
chemical plants, environmental equipment, steel structures, industrial and
general machinery, aircraft, space rocketry and air-conditioning systems. For
more information, please visit the MHI website at 
Mitsubishi Heavy Industries
Hideo Ikuno
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