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CPU or processor: The main processor (Central Processing Unit or CPU) is a microprocessor-based system that executes the control program after reading the status of field inputs and then sends commands to field outputs.
I/O section: I/O modules act as “Real Data Interface” between field and CPU. The PLC knows the real status of field devices, and controls the field devices by means of the relevant I/O cards.
Programming device: A CPU card can be connected with a programming device through a communication link via a programming port on the CPU.
Operating station: An operating station is commonly used to provide an “Operating Window” to the process. It is usually a separate device (generally a PC), loaded with HMI (Human Machine Software).
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What is the market cap for BT Group plc BT?
As of July 2014, the market cap for BT Group plc (BT) is $52,065,145,697.04.
Is bp plc secondary sector?
yes it is
Why were plc's developed?
"PLC" is the replacement of sequential ckts(and,or gates).relay logics.before the development of plc,s relay logics uses approx 1000,s of wires and 100,s of connections.and the main problem with relay logics is that these wires wered replaced and repaired annualy ,which is a very difficult task and time consumming.so plc is developed to solve the problem.(by faheem khan)comsats abbottabad
Can you name a business that is facing legal ethical and social responsibility dilemma?
Intercontinental bank plc.
What are the advantages of being a PLC in tesco?
Being a Public Limited Company (PLC) allows Tesco to access capital more easily through the sale of shares to the public, facilitating expansion and investment in new technologies and services. It also enhances the company's credibility and visibility in the market, attracting more customers and potential partnerships. Additionally, a PLC structure can provide greater liquidity for shareholders, as shares can be bought and sold on the stock exchange. Overall, these advantages contribute to Tesco's competitive positioning in the retail industry.
Why you use two switches on PLC for start and stop?
The reason you have to use two switches (a combination of start and stop push button) on PLC is because it is how the program is written.
What is PLC in instrumentation?
Plc is a programmable logic controller.It has a great role in the instrumentation field.With the use of programming in the plc,we can control and monitor all the equipments or instruments in the various plants and later the whole process can be viewed by means of scada.
What are the top ten insurance companies in Nigeria?
Staco insurance plc. Leadway insurance plc Law union and rock insurance plc Aiico Niger insurance plc Consolidated hallmark insurance Goldlink insurance plc. Custodian insurance plc NEM insurance plc Mutual assurance plc
Protocols of a PLC controlled network system?
Some PLC systems can use traditional TCP/IP protocols to exchange information; others use a proprietary packet driven system that differs from manufacturer to manufacturer.
What applications would you use a rack-mounted PLC for?
A modular PLC is use mainly for complex task such as manufacturing of precision equipment
What is meant by plc scan time?
PLC Scan Time means plc requires some operating cycle to Plc input verification,Plc output updates and Execution of program.
Where are caradon plc shares?
caradon plc was taken over by novar plc,they have now been taken over by melrose plc. is this usefull
One function of a PLC input interface module is to?
PLC's are used for automation of electromechanical processes, such as control of machinery on factory assembly lines, amusement rides, or light fixtures. just about anything can be controlled because PLC's use microprocessors which can be programmed for a variety of tasks.
What is an example of a plc?
natwest bank plc
Is Alton towers an Ltd or a Plc?
plc
What is the full name PLC?
Meaning of PLC
How many types of PLC?
there r 16th types of plc ok
