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).