Basic PLC

What does PLC stand for?

• Programming Learn Control

• Please Learn Carefully

• Programmable Logic Controller

• Programmable Ladder Controller

Choose the symbol that is similar to this diagram.

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Choose the symbol that is similar to this diagram.

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The basic function of a PLC is to

• amplify various weak signal sources

• control the speed of motors

• accept inputs, make logical decisions, and send outputs.

• convert nonelectrical quantities into electrical voltage.

The basic difference between a PLC and a relay control system is that

• different types of input devices are used.

• different types of output devices are used.

• different input and output voltage levels are used.

• one uses relay control logic and the other uses programmed instructions.

Field devices refer to

• input devices only.

• output devices only.

• load devices only.

• sensors and actuators that are physically wired to PLC input/output modules.

If these inputs are push buttons and the output is a light, which one of these combinations will result in turning on the light?

• Pressing A and B

• Pressing A and D

• Pressing C

• Pressing A and C

identify the input device in PLC

• LED

• Motor

• Lamp

• Sensor

Identify the output device in PLC

• pump

• switch

• push button

• sensor

What are two types of time delays that we reviewed?

• a

• a