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OPC Unified Architecture – Advantages And V1.1 GB OPC FOUNDATION – www.OPCfOUndAtiOn.Org Open OPC Unified Architecture – – > 450 members – Platform-neutral Advantages and possibilities of use – All areas of application for manufacturers and users of – All connections automation, IT or MES products Productivity – Industry standard OPC UA – Manufacturer-independent – Interoperability ➞ OPC Unified Architecture is the on which they are used. OPC UA – Reliability new technology generation of the supplements the existing OPC OPC Foundation for the secure, industry standard by important Standardised reliable and vendor-neutral trans- characteristics such as platform communication Collaboration port of raw data and pre-pro- independence, scalability, high via internet and – Device Integration cessed information from the man- availability and Internet capability. via firewalls – IEC 61131-3 / PLCopen – Analyzer Device Integration ufacturing level into the production OPC UA is no longer based on – ISA-95, ISA-88 planning or ERP system. With DCOM, but has been conceived ➞ OPC UA uses an – MTConnect optimized TCP-based UA OPC UA, all desired information is on the basis of a service-oriented – Smard Grid binary protocol for data ex- available to every authorised appli- architecture (SOA). OPC UA can – Field Device Integration change; Web Services and cation and every authorised per- therefore be ported very easily. – EDDL and FDT HTTP are additionally sup- son at any time and in any place. Today, OPC UA already forms ported. It is sufficient to This function is independent of the the bridge between the Enterprise open up just a single port in AddrESS: manufacturer from which the ap- level down to embedded automa- a firewall. Integrated secu- plications originate, the program- tion components – independent of rity mechanisms ensure se- OPC Foundation ming language in which they were Microsoft-, UNIX- or other operat- cure communication via the 16101 N. 82nd Street Internet. developed or the operating system ing systems. ■ Suite 3B Scottsdale, AZ 85260-1868 USA COntACt: Phone: (1) 480 483-6644 Fax: (1) 480 483-7202 [email protected] OPC Unified Architecture – Standardised communication infOrMAtiOn: PrOtECtiOn AgAinSt UnAUtHOriSEd dAtA SECUrity And rELiABiLity www.opcfoundation.org dAtA ACCESS ➞ OPC UA defines a robust architecture with reliable ➞ The OPC UA technology uses a mature security communication mechanisms, configurable timeouts, concept to ensure protection against unauthorised automatic error detection and recovery mechanisms. access or sabotage of process data and as well The communication connections between OPC UA SECUrity against errors due to careless operation. The OPC clients and servers can be monitored. OPC UA offers UA security concept is based on World Wide Web redundancy features that can be applied to server ➞ X509 certificates standards and encompasses options for user au- and client applications to prevent loss of data and to ➞ OpenSSL encryption thentication, the signing of messages and the en- implement highly available systems. ■ ➞ User / password cryption of the transmitted user data. ➞ Access rights for each attribute PLAtfOrM indEPEndEnCE And SCALABiLity ➞ Due to the use of service-oriented basic tech- with non-Windows platforms, is no longer neces- nologies, OPC UA is platform-independent and sary. However, OPC UA components can also be enables the implementation of completely new, used in IT systems, in ERP systems, in produc- COOPErAtiOn: cost-saving automation concepts. Embedded tion planning and control software and in other field devices, process control systems, program- eBusiness applications with Unix operating sys- ➞ PLCopen mable logic controllers, gateways or operator tems such as Microsoft Windows, Solaris, HP- ➞ ISA ➞ MIMOSA panels can contain lean OPC UA server imple- UX, AIX and others. The functionality of OPC UA ➞ FDT mentations, which can be ported directly to op- components is scalable: from a lean implemen- ➞ ECT erating systems such as Windows Embedded, tation in embedded devices up to the maximum Linux, VxWorks, QNX, RTOS or others. A sepa- configuration in company-wide data administra- rate Windows PC for the OPC server, which up to tion systems on mainframe computers. ■ now has provided access to the data on devices Extended possibilities despite simplified interface – New OPC UA communication is fast, secure and flexible on all platforms SiMPLifiCAtiOn By UnifiCAtiOn MOrE APPLiCAtiOn OPtiOnS ➞ OPC UA defines an integrated address space and ➞ The versatile usability of the OPC UA technology an information model in which process data, alarms, enables the implementation of completely new verti- historical data and program calls can be represent- cal integration concepts. By cascading OPC UA ed. The items of information are defined as typed components, information can be transferred secure- objects, which can be placed in relationship to each ly and reliably from the shop floor to the production other. Beyond that, OPC UA supports the use of planning or ERP system. Embedded UA servers at complex data structures. This allows complex pro- the field device level, UA components at automation cedures and systems to be described completely level and integrated UA Clients in ERP systems at with OPC UA. Enterprise level can thereby be connected to one an- With Classic OPC three different OPC servers – DA, other. The respective UA components can be geo- AE and HDA – with different semantics are neces- graphically distributed and easily separated from one sary in order, for example, to acquire the current another by firewalls. value of a temperature sensor, a high temperature OPC UA offers standardisation organisations the event and the historical average value of the tem- possibility to use UA services as a transport mecha- perature. This can be achieved very easily with OPC nism for their information models. Today, the OPC UA in just one component. Configuration and engi- Foundation cooperates with different standardisation neering times can thus be significantly reduced. groups, such as PLCopen, ISA or ECT (EDDL Coop- eration Team), on companion standards. ■ StrOng PErfOrMAnCE ➞ Through the development of its own, lean TCP- based UA binary protocol with efficient data coding, OPC UA offers very efficient data transfer for the ful- fillment of the highest performance requirements. OPC UA – Platform independence and scalability PrOtECtiOn Of inVEStMEnt ➞ OPC UA will replace Classic OPC in the long term. OPC products with millions of installations can be MOrE infOrMAtiOn In the mid term, however, DCOM-based OPC prod- used from the beginning with the new OPC UA prod- ucts and UA products can co-exist. The migration ucts. This gives the user advantages, because he www.opcfoundation.org strategy of the OPC Foundation enables the combi- can use any desired products from different manu- nation of Classic OPC and OPC UA products. In this facturers – Classic OPC and OPC UA. ■ way the installed base of several thousand Classic .
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