Home » Programmable Logic Controller (PLC) Questions and Answers – 6
Practical Questions

Programmable Logic Controller (PLC) Questions and Answers – 6

Suppose we have a PLC connected to three process switches as shown in this illustration:

PLC Programming Answers

In the above Diagram :

  • X1 to X4 : Digital Inputs
  • Y1 to Y4 : Digital Outputs

Determine the switch actuation statuses (i.e. low versus high process stimulus) given the “live” display of the ladder logic program shown here:

Level Switch PLC Ladder Logic

Also, determine the status of the lamp connected to the PLC’s Y1 output.

Answer :

  • Low level and high flow and high temperature.
  • The lamp will be de-energized.

Share Your Answer / Comments

Credits :  Tony R. Kuphaldt – under CC BY 1.0

For More PLC Questions : CLICK HERE


Share With Your Friends

Related Articles

PLC Practice Questions

S Bharadwaj Reddy

Determine the Instrument Calibration Error

S Bharadwaj Reddy

Pneumatic Level Transmitter Value Struck?

S Bharadwaj Reddy

Calculate Density and Specific Gravity

S Bharadwaj Reddy

Pressure Switch Questions

S Bharadwaj Reddy

Process Control High Level Alarm Fault Analysis

S Bharadwaj Reddy

Leave a Comment

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Accept Read More

Programmable Logic Controller (PLC) Questions and Answers - 6

WordPress Image Lightbox
Send this to a friend