Inst ToolsInst ToolsInst Tools
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Search
  • Books
  • Software
  • Projects
  • Process
  • Tools
  • Basics
  • Formula
  • Power Plant
  • Root Cause Analysis
  • Electrical Basics
  • Animation
  • Standards
  • 4-20 mA Course
  • Siemens PLC Course
Reading: Programmable Logic Controller (PLC) Questions and Answers – 13
Share
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • Design
  • PLC
  • Interview
  • Control System
Search
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > Practical Questions > Programmable Logic Controller (PLC) Questions and Answers – 13

Programmable Logic Controller (PLC) Questions and Answers – 13

Last updated: June 6, 2018 10:07 am
Editorial Staff
Practical Questions
1 Comment
Share
1 Min Read
SHARE

Siemens S7-200 PLC Questions and Answers

Suppose we have a Siemens S7-200 PLC connected to a pair of process switches and light bulbs as shown in this illustration:

Siemens S7-200 PLC

Examine the following relay ladder logic (RLL) program for this Siemens PLC, determining the statuses of the two lamps provided the pressure switch sees a fluid pressure of 30 PSI and the level switch sees a liquid level of 4 feet:

Siemens S7-200 PLC Logic

Answer :

Green lamp is on, red lamp is off.

Share Your Answer / Comments

Credits :  Tony R. Kuphaldt – under CC BY 1.0

For More PLC Questions : CLICK HERE

 

Don't Miss Our Updates
Be the first to get exclusive content straight to your email.
We promise not to spam you. You can unsubscribe at any time.
Invalid email address
You've successfully subscribed !

Continue Reading

Motion-Balance and Force-Balance Instruments
Explain Operation of the Lamp Circuit ?
How to Decrease Span of Pressure Gauge?
Stripper Overhead Temperature Control System
Problem with Pirani Gauge
Liquid Flow Control Loop Controller Action
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
1 Comment
  • azetou says:
    August 30, 2017 at 1:43 pm

    In the Relay Ladder Logic program, you have to show the second line L2 of the power supply, or else both lamps will be off whatever the status of the inputs.

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
210kSubscribersSubscribe
38kFollowersFollow

Categories

Explore More

Diagnosing Electric Motor Circuit
Explain What these Spool Valve Symbols Represent?
Signal Strength of Guided-wave Radar Level Instrument
Thermocouple Terminal block Questions
Troubleshoot Allen Bradley PLC Logic
Fisher model 546 I/P transducer
Find Thermocouple Ouput Voltage
Calculate Hydraulic System Fluid Pressure

Keep Learning

Trends of PV and SP on a process chart

Inspecting the Trends of PV and SP on a Process Chart Recorder

Suppose the lamp refuses to light up

Indentify Faults in Simple Lamp Circuit including Failed Wires

Calculation of Hydrostatic Pressure

Calculation of Hydrostatic Pressure

liquid level Measurement

Hydrostatic Level Measurement – Temperature related Density Change Effects

Pneumatic Relay

Pneumatic Relay Questions

Drum Level differential pressure transmitter

Calculate Differential Pressure Sensed by Level Transmitter

DP Transmitter Problem

DP Transmitter Problem

Pressure gauge is subjected to five different pressures

How a Bourdon Tube Pressure Gauge might be Adjusted for Linearity?

Learn More

Applications of CNC Machining

Important Applications of Rapid Prototype CNC Machining Services

Centrifugal Compressor Shaft Vibrations Problem

Centrifugal Compressor near ½-RPM Frequency High Magnitude Shaft Vibrations

Digital Electronics Multiple Choice Questions

Multiplexers Objective Questions – Part 1

HART Communication Tutorial 2

HART Communication Tutorial Part 5

Electromagnetic Fields Objective Questions

Electromagnetic Subject Quiz

toroidal conductivity probe principle

Electrodeless Conductivity Probes Principle

pH Analyzers Questions and Answers

pH Measurement Questions & Answers

Reformer Fan Bearing Change Times cut by 90%

Reformer Fan Bearing Change Times cut by 90%

Menu

  • About
  • Privacy Policy
  • Copyright

Quick Links

  • Learn PLC
  • Helping Hand
  • Part Time Job

YouTube Subscribe

Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?