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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 and disadvantages of tesco being a PLC ownership?
As a Public Limited Company (PLC), Tesco benefits from the ability to raise capital by selling shares to the public, allowing for greater financial resources for expansion and innovation. Additionally, being a PLC enhances its visibility and credibility in the market. However, disadvantages include increased regulatory scrutiny and pressure from shareholders to deliver short-term profits, which may affect long-term strategic decisions. Furthermore, the potential for hostile takeovers can pose a risk to its management and operational independence.
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.
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.
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
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
