qr code vb.net free Networking of Sensors and Control Systems in Manufacturing in Software

Maker Code128 in Software Networking of Sensors and Control Systems in Manufacturing

Networking of Sensors and Control Systems in Manufacturing
Recognize Code 128B In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Code128 Generation In None
Using Barcode creation for Software Control to generate, create Code 128 Code Set C image in Software applications.
than using no guidelines at all. However, because RS-232 does not completely define all of the relationships that must exist in communication links, it falls far short of being a true standard or protocol.
Decoding Code 128C In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Printing Code 128A In C#.NET
Using Barcode generator for .NET Control to generate, create ANSI/AIM Code 128 image in Visual Studio .NET applications.
Ethernet
Paint Code 128 Code Set B In .NET
Using Barcode creator for ASP.NET Control to generate, create USS Code 128 image in ASP.NET applications.
Encode Code 128B In .NET Framework
Using Barcode drawer for VS .NET Control to generate, create USS Code 128 image in VS .NET applications.
As illustrated in Fig. 4.11, one approach to local area networks (LANs) is to define a protocol for the first two layers of a communication strategy and then allow individual users to define the upper layers. This approach has been widely applied using a method referred to as Ethernet [Metcalfe and Boggs (1976), Shock and Hupp (1980), Tanenbaum (1988)], which was created by Xerox Corp. In every computer communication system, there must be a means of scheduling for each node to transmit onto the network and listen to receive messages. This may be done on a statistical basis. For example, when a unit needs to transmit over the network, it makes an effort to transmit. If another node tries to transmit at the same time, both nodes become aware of the conflict, wait for a random length of time, and try again. It might seem that this would be an inefficient means of controlling a network, since the various nodes are randomly trying to claim the network for their own use, and many collisions may occur. As it turns out, for lower communication volumes, this method works very well. As the number of nodes on the system and the number of messages being exchanged increases, however, the number of collisions between active nodes goes up and reduces the effectiveness of the system (Fig. 4.12).
Code 128 Code Set B Generator In Visual Basic .NET
Using Barcode generation for VS .NET Control to generate, create ANSI/AIM Code 128 image in .NET applications.
Generating European Article Number 13 In None
Using Barcode creator for Software Control to generate, create EAN13 image in Software applications.
FIGURE 4.12 Delay and throughput versus network load (number of users).
Bar Code Generation In None
Using Barcode generator for Software Control to generate, create barcode image in Software applications.
Painting Code-128 In None
Using Barcode creator for Software Control to generate, create Code 128A image in Software applications.
Throughput
Generate ECC200 In None
Using Barcode encoder for Software Control to generate, create Data Matrix image in Software applications.
Code 39 Full ASCII Printer In None
Using Barcode generator for Software Control to generate, create USS Code 39 image in Software applications.
Delay and throughput
C 2 Of 5 Drawer In None
Using Barcode generation for Software Control to generate, create C 2 of 5 image in Software applications.
EAN-13 Supplement 5 Generator In Java
Using Barcode creation for Android Control to generate, create UPC - 13 image in Android applications.
Delay
Code 39 Scanner In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Encoding Data Matrix 2d Barcode In Java
Using Barcode printer for Java Control to generate, create ECC200 image in Java applications.
Network load (number of users)
Encode EAN 128 In Visual C#.NET
Using Barcode generation for VS .NET Control to generate, create EAN128 image in Visual Studio .NET applications.
Code 128 Code Set B Drawer In Objective-C
Using Barcode creation for iPad Control to generate, create Code-128 image in iPad applications.
Four
EAN / UCC - 14 Encoder In Java
Using Barcode printer for Android Control to generate, create GTIN - 128 image in Android applications.
Barcode Drawer In Objective-C
Using Barcode creator for iPhone Control to generate, create bar code image in iPhone applications.
This type of access control for a computer network is referred to as carrier-sense multiple-access with collision detection (CSMA/CD). Ethernet and similar solutions are widely applied to create CSMA/CD networks, particularly in settings in which a maximum waiting time for access to the network does not have to be guaranteed. This type of network is simple to install, and a wide range of hardware and software products are available for support. On the other hand, as indicated in Fig. 4.12, network performance can degrade significantly under high load; therefore, the utility of an Ethernet-oriented network will depend on the particular configuration and loads expected for the network.
4.9.3 Transmission Control Protocol (TCP)/Internet Protocol (IP)
TCP/IP applies to the transport and network layers indicated in Fig. 4.9. TCP/IP thus provides a means for addressing intermediate protocol levels, and in fact is often combined with Ethernet in a communication approach that defines both the lower and middle aspects of the system. TCP/IP functions by dividing any message provided to these middle layers into packets of 64 kbytes and then sending packets one at a time to the communication network. TCP/IP must also reassemble the packets in the correct order at the receiving user. TCP/IP provides a common strategy to use for networking. It allows extension of the Ethernet lower layers to a midlayer protocol on which the final application and presentation layers may be constructed.
Manufacturing Automation Protocol
The manufacturing automation protocol (MAP) is one of the protocols developed for computer communication systems, and was developed specifically for use in a factory environment. General Motors Corp. has been the leading advocate of this particular protocol. When faced with a need for networking many types of equipment in its factory environment, General Motors decided that a new type of protocol was required. Beginning in 1980, General Motors began to develop a protocol that could accommodate the high data rate expected in its future factories and provide the necessary noise immunity expected for this environment. In addition, the intent was to work within a mature communications technology and to develop a protocol that could be used for all types of equipment in General Motors factories. MAP was developed to meet these needs. The General Motors effort has drawn on a combination of Institute of Electrical and Electronics Engineers (IEEE) and ISO standards, and is based on the open system interconnect (OSI) layered model, as illustrated in Fig. 4.10.
Copyright © OnBarcode.com . All rights reserved.