Oldest Bitbus commonly used field bus technology Bitbus. Bitbus created by Intel Corporation to inc

Fieldbus is the family name of industrial computer network protocol used for real-time distributed control, standard IEC 61 158 as s ebuah automated industrial complex systems - such as manufacturing assembly lines - usually requires a distributed control system is hierarchically organized system controller - function. In this hierarchy, malware fighter there is usually a Human Machine Interface (HMI) at the top, where the operator can monitor or operate the system. It is usually associated with the middle layer of a programmable logic controller (PLC) via the communication system of non - critical moments (eg Ethernet). At the bottom is a fieldbus control chain that connects the PLC to the component that actually do work, such as sensors, actuators, electric motors, console lights, switches, valves and contactors.
Fieldbus is the industrial network system for real-time distributed control. It is a way to connect the instrument at the factory. Fieldbus works on the network structure which normally allows daisy - chain, star, ring, branches, and tree network topology. Previously, the computers are connected using the RS-232 (serial connection) where only two devices can communicate. It would be equivalent to that used today 4-20 mA communication scheme malware fighter that requires each device has its own communication point at the controller level, while the fieldbus is equivalent to the current -type LAN connection, which requires only a single point of communication at the level of the controller and allows few (hundreds) of analog and digital points to be connected at the same time. This reduces both the required cable length and the number of cables required. Moreover, because the device that communicates via the fieldbus requires a microprocessor, a few points are usually provided by the same device. Some fieldbus devices now supports control schemes such as PID control on the side of the device, not force the controller to do the processing.
Oldest Bitbus commonly used field bus technology Bitbus. Bitbus created by Intel Corporation to increase the use of Multibus systems in industrial malware fighter systems by separating slow function i / o of faster memory access. In 1983, Intel created the 8044 Bitbus by adding a field bus microcontroller firmware for existing 8051 microcontroller. Bitbus using EIA - 485 in the physical layer, with two twisted pairs - one for data and one for clocking and signal. SDLC use the data link layer allows 250 nodes on a single segment with a total distance of 13.2 km. Bitbus have one master malware fighter node and several slave, slave to only respond to requests from the master. Bitbus not define routing at the network layer. The 8044 permit only a relatively small data packets (13 bytes), but embeds a set of efficient RAC (remote access and control) task and the ability to develop custom RAC task. In 1990, the IEEE adopted the Bitbus as Serial Microcontroller System Control Bus (IEEE - 1118). Today BITBUS managed by BEUG -. BITBUS European Users Group standardization Although fieldbus technology has been around since 1988, with the completion of the ISA S50.02 malware fighter standard, the development of international standards take years. malware fighter In 1999, IEC SC65C / WG6 standard committee meeting to resolve differences in the draft IEC standard fieldbus. The results of this meeting is an early form of IEC 61 158 standard with eight different sets of protocols called "type" as follows: Type 1 Foundation Fieldbus malware fighter H1 ControlNet Type 2 Type 3 Type 4 P Profibus Type 5 FOUNDATION fieldbus -net HSE (High Speed Ethernet) Type 6 SwiftNet (protocol developed for Boeing, since withdrawn) WorldFIP 7 Type 8 Type Interbus standard form was first developed for the European Common Market, concentrating less on similarity, and an end - the main elimination malware fighter restraint of trade between countries. The issue of equality has now handed over to the international consortium that supports each type of fieldbus standards. Almost immediately after it is approved, the IEC standards development work stops and the committee disbanded. A new IEC committee SC65C / MT - 9 was formed to resolve the conflict malware fighter in the form and substance of the more than 4000 pages IEC 61158. Work on the type of protocol above is substantially complete. The new protocol, such as for safety fieldbuses or real-time fieldbuses ethernet- being accepted into the international fieldbus malware fighter standard definition for a typical 5-year maintenance malware fighter cycle. malware fighter Both Foundation Fieldbus and Profibus technology now