Image Processing Reference
In-Depth Information
27.5.1.3 ISA100
Another ongoing initiative is ISA (formerlycalledISA-SP)[].Originally,theintentof
ISA was to not standardize all elements in the system, instead only to specify the upper lev-
els in the stack (i.e., the open standards interface [OSI] stack), with a number of potential lower
levelimplementations.hisscopehasbeenchangedtoincludealllevelsofthestackaspartofthe
specification.
The ISA workgroup also contained two subgroups that investigated wireless solutions for dif-
ferent use cases: SP.a aimed for control use cases, while SP. targeted monitoring use cases.
Compared to WirelessHART, ISA takes a more generic path as an industrial WSN technology.
It will support the transportation of many different fieldbus formats (where HART is one of them).
ISA aims to support industrial applications in the range from class  to , i.e., from critical control
to monitoring.
The standard is currently (February ) at a preliminary draft stage, and is expected to be
released by the end of .
27.5.1.4 PNO WSAN
The PNO (Profibus Nutzerorganization, []) formed a work group, wireless sensors and actuator
networks (WSAN), with the purpose of investigating suitable wireless communication technologies
for their two areas of interest: process automation and factory automation.
A decision to use WirelessHART as a base for process automation was taken by the end of ,
but a suitable technology has not yet been selected for factory automation.
27.5.1.5 6loWPAN (IETF RFC 4944)
loWPAN is an acronym for “IPv over low-power wireless personal area networks,” which is
a protocol for transmission of IPv packets over IEEE .. networks. This technology will
enable the extension of the typical WSN structure into an IP-based system, basically allowing any
computer in the automation plant to access any WSN device. It also allows reuse of existing IP
networktoolsdevelopedforhomeandoiceuse,suchascommissioningandnetworkdebugging
support, etc.
27.5.1.6 Proprietary Solutions
There are many suppliers of proprietary WSN solutions, who offer a wide range of solutions, from bare
technology/components (stack and hardware) to completeWSNsystems.herearealsoindustrial
automation suppliers who offer WSN solutions as part of their automation system.
Below is just a small selection of all the different products and solutions available on the mar-
ket today:
ArchRock [] provides a complete loWPAN solution, IP-based sensor networking,
which communicates using IEEE .. (i.e., it operates in the ISM bands).
Omnex Controls [] provides devices, which uses a proprietary frequency hopping
spread spectrum (FHSS) technology that operates in either the  MHz or . GHz
ISM band.
DUST Network [] (see Section .. for more details) is an FHSS solution, which is also
based on IEEE ...
International Society of Automation (ISA).
 
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