Discuss the Basic Operation of the PLC (Programmable Logic Controller)
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Discuss the Basic Operation of the PLC (Programmable Logic Controller)
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- Sketch and explain the block diagram of the program scan algorithm in a Programmable LogicController (PLC). Define the basic timing parameters. What languages are used for PLCprogramming?Draw the functional diagram of a Programmable Logic Controller (PLC) and explain the role ofeach module. What measures are taken for fail-safe operation of PLCs?Explanation about (Deal with operational amplifier controllers and programmable logic controllers)
- What Is programmable logic arrays?24) Which of the following elements does not affect how a ladder logic program is developed?A) The contact type and active state of the input field devices.B) The type, direct or inverse acting, and active state of the output field devices.C) The requirement for current sinking or sourcing inputs and outputs.D) The choice of normally-open and normally-closed instructions for the PLC program.Industrial Motor Controls 18.a. The PLC motor speed control system you are working on has an analog current loop between the D/Amodule and the frequency inverter. What is the best method of checking this loop current?A. Open one of the signal wires in the loop and install a high-impedance VOM in series with the loop.B. Measure the voltage between the SIGNAL IN and +10V terminals of the inverter.C. Measure the voltage across the terminals of the D/A module.D. Open the loop and place a low-impedance VOM in series with the loop.18.b. The register that is assigned to a D/A module in a motor speed control circuit must be assigned to thatD/A module. How is this done?A. By placing the register for the D/A module in a configuration tableB. By forcing a value into the registerC. The registers are previously assigned by the PLC manufacturer.D. By setting DIP switches