Communication protocol interface

A recent data communications protocol for Building Automation and Control Networks (BACnet), ASHRAE Standard 135-1995, is an important step to ensure that controllers made by different manufacturers can communicate with each other in a simple way, avoiding the expense of additional interface hardware and communication software. 

System installation in a permanent location may require a sample conditioning system featuring some degree of automation, such as automatic cleaning (the system illustrated above features such a system) and outlier sample collection and the need to interface to an existing control system process computer. The latter may require that the system operates with a standardized communications protocol, such as Modbus, for the chemical industry. Certain specialized industries use different protocols, such as the semiconductor industry, which uses SECS and SEC-11 protocols. A standardized approach designated the Universal Fieldbus is another method/protocol for process analyzers which is being supported by certain hardware manufacturers. 

Interfaces in the control loop must be standardised. Different suppliers normally have proprietary control systems, thus it is vital to select a standard communication protocol in the early design phase, preferably based on industry standards. 

Interfaces (e.g., to field devices, data acquisition, reports and HMI), input/output (I/O) list, communication protocol, and data link requirements. 

SCSI bus Another name for the SCSI interface and communications protocol. 

To specify requirements on a system independently of the system structure, one has to define an interface, as it is common practice with communication protocols (e.g., see [Lini83, Tane88] personally, I leamt a lot from [Krum86]). The main object of the specification is the possible sequences of events at this interface, and an event is an input or output at one of the access points see Figure 4.1. 

Layer 2 Technical adapters layer. This layer is responsible to embed legacy systems into the new technical infrastructure. This is done by technical adapters. These components serve as proxies adapting the existing COBOL interfaces to the required new syntax. No kind of semantical homogenization is done on this level. A typical task of an adapter is, for example, the conversion of data types. Furthermore, adapters encapsulate physical distribution and the corresponding communication protocols. 

In the past, process control systems have been based on proprietary computer platforms, acting as "islands of information" from which production reports were printed out and stored as part of the critical production information. This situation is rapidly changing as most process control systems now operate on open standard platforms that are much easier to integrate. Recent development in control communication protocol standards has made such system integration even easier. Nevertheless, many process control systems currently used have been in operation for many years, leaving companies with the challenge of interfacing these proprietary systems in order to release the benefits of paperless operation. 

To improve the interfacing of DARC with external systems a set of programs has been planned for development by a team of Telesystemes and Akzo staff. A new open-ended communication protocol has been written initialising a subprocess controlled by transferred logical names. Via this protocol the following options are achieved ... 

Originally, all CDS were control and evaluation systems of one instrument manufacturer. The aim was to provide a better and more convenient control of the in-house HPLC and GC instruments. As the solutions were always focused on the own instrument hardware, almost every manufacturer uses his own system to connect instruments to the computer hardware. Besides standardized formats such as IEEE488 Bus Waters Agilent), there can be found serial interfaces, later on often USB ports or proprietary connections. In correlation with standardized communication protocols, this can lead to incompatibiUties, why some laboratories have decided to use several CDS each having its particular data system. In order to decrease the effort that arises from training laboratory staff and multiple installations, maintenances, and software validations, companies aim to decrease the number of CDS in their laboratories to a minimum. Having the focus on one CDS helps to define a unique workflow and ensures a consistent documentation of the processes. 

Traditional ERP systems were client/server based and consisted of a database system, communication protocols and a user interface framework. With the advent of the Internet, vendors went to web-based interfaces. This made it possible to access the system though any web-enabled device (since no code rests... 

Communication interfaces are used for exchanging data between the RIS informatic system and adjacent software applications. They are compatible with the HL7 standard and use the TCP/IP communication protocol. All interfaces are compliant with the HIPAA (Health Insurance Portability and Accountability Act) regulations. Some of these interfaces are designed based on the IHE specifications. Figure 3 describes the connection between the RIS server and other medical informatics systems (HIMSS and RSNA, 2005). 

Have suitable communication interfaces been defined with regard to communication protocols and electrical interference ... 

Security issue is one of the most important aspects in the current design of SIS. With the help of an open interface like Open Platform Communications (OPCs) (Fig. XI/4.0 1) it is possible to integrate not only BPCS and SIS but the entire en terprise network. Common and open communications protocol architecture stan dards are replacing the diverse and disparate proprietary systems of industrial control systems. This migration empowers users to access new and more efficient methods of communication as well as more robust data, quicker time to market, and... 

The functional and non-functional specifications for the system interfaces should be clearly expressed for all possible distinct modes of behaviour of the system. Special models and specification methods such as those used for the description of communication protocols may be used. 

An analysis of all internal interfaces (such as those for drivers and communications protocols) should be carried out and documented to demonstrate that all interface properties are specified. This should include items such as the definition of the information to be transmitted across the interfaces, eonsideration of the characteristics of synchronous and asynchronous protocols, and selection of transfer rates. 

Application Rexibility Non-intrusive calibration, mounting orientation options, remote sensor, and with the FieldServer option, interface to a choice of over 75 communication protocols. 

The SPI kit covers the primary processing machine communication protocol with chillers, blenders, dryers, water systems, discrete mold-temperature controllers, and the like. The protocol provides for centralized setup and monitoring of auxiliaries by the primary machine. The test simulation software that is a key part of the kit ensures uniform interpretation of technical specifications. It is a combination of a detailed technical specification of hardware requirements such as the type of cable, the connector and electrical interface, and software requirements. The kit protocol shows how electronic information moves through the system. 

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