Answer / mastersensor80

Ethernet is the most widely-installed local area network (
LAN) technology. Specified in a standard, IEEE 802.3,
Ethernet was originally developed by Xerox from an earlier
specification called Alohanet (for the Palo Alto Research
Center Aloha network) and then developed further by Xerox,
DEC, and Intel. An Ethernet LAN typically uses coaxial
cable or special grades of twisted pair wires. Ethernet is
also used in wireless LANs. The most commonly installed
Ethernet systems are called 10BASE-T and provide
transmission speeds up to 10 Mbps. Devices are connected to
the cable and compete for access using a Carrier Sense
Multiple Access with Collision Detection (CSMA/CD )
protocol.
Fast Ethernet or 100BASE-T provides transmission speeds up
to 100 megabits per second and is typically used for LAN
backbone systems, supporting workstations with 10BASE-T
cards. Gigabit Ethernet provides an even higher level of
backbone support at 1000 megabits per second (1 gigabit or
1 billion bits per second). 10-Gigabit Ethernet provides up
to 10 billion bits per second.

Ethernet was named by Robert Metcalfe, one of its
developers, for the passive substance called "luminiferous
(light-transmitting) ether" that was once thought to
pervade the universe, carrying light throughout. Ethernet
was so- named to describe the way that cabling, also a
passive medium, could similarly carry data everywhere
throughout the network

Answer / bharani

All three are communication protocols b/n devices or
controlers which uses CIP technology.But these three vary
on physical media, data transfer ,max.node, distance,CRC
etc.

Answer / brijlal gupta

Ethernet is a one type of cummuniation cable,which is
mainly used in DCS system for cummunication purpose.

ether net is used for FCS to HIS cummunication.

Answer / santu dhar

Eathernet is a hub which use to splite one network input in
more output. the number of output is depends on the number
of port.

which types of oxygen analyzer describe with drawing ?

2 Answers  

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Why is a dead weight tester so called by that name?

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Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =

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How to calibration coriolis flow meter?

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We are used CENTUM CS3000 of YOKOGAWA. please tell me how to simulate wihtout FCS and vnet.

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What is SCADA ? WHAT is it role in DCS ?

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key exchanges in wpa,wpa2,tls

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