Inst ToolsInst ToolsInst Tools
  • Ask
  • Courses
  • Videos
  • Q & A
    • Interview
      • Instrumentation
      • Electronics
      • Electrical
      • Practical Questions
    • MCQ
      • Instrumentation MCQ
      • Electrical MCQ
      • Electronics MCQ
      • Control Systems MCQ
      • Analog Electronics MCQ
      • Digital Electronics MCQ
      • Power Electronics MCQ
      • Microprocessor MCQ
      • Multiple Choice Questions
  • EE
    • Electronics
      • Electronics Q & A
      • Electronic Basics
      • Electronic Devices & Circuits
      • Electronics Animation
      • Digital Electronics
    • Electrical
      • Electrical Basics
      • Electrical Q & A
      • Power Electronics
      • Electrical Machines
      • Electrical Animation
      • Power Systems
      • Switchgear & Protection
      • Transmission & Distribution
  • Measure
    • Control Valves
    • Calibration
    • Temperature
    • Pressure
    • Flow
    • Level
    • Analyzers
    • Switches
    • Vibration
    • Solenoid Valve
  • Control
    • PLC Tutorials
    • Control Systems
    • Safety Instrumented System (SIS)
    • Communication
    • Fire & Gas System
  • More
    • Design
    • Tools
    • Animation
    • Basics
    • Formulas
    • Standards
    • TextBooks
    • Common
    • Software
    • Excel Tools
    • Erection & Commissioning
    • Process Fundamentals
    • Videos
    • Books
Search
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Reading: Programmable Logic Controller Maintenance Check Points
Share
Notification Show More
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • PLC Tutorials
  • Control Systems
Search
  • Ask
  • Courses
  • Videos
  • Q & A
    • Interview
    • MCQ
  • EE
    • Electronics
    • Electrical
  • Measure
    • Control Valves
    • Calibration
    • Temperature
    • Pressure
    • Flow
    • Level
    • Analyzers
    • Switches
    • Vibration
    • Solenoid Valve
  • Control
    • PLC Tutorials
    • Control Systems
    • Safety Instrumented System (SIS)
    • Communication
    • Fire & Gas System
  • More
    • Design
    • Tools
    • Animation
    • Basics
    • Formulas
    • Standards
    • TextBooks
    • Common
    • Software
    • Excel Tools
    • Erection & Commissioning
    • Process Fundamentals
    • Videos
    • Books
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > PLC Tutorials > Programmable Logic Controller Maintenance Check Points

Programmable Logic Controller Maintenance Check Points

Last updated: September 5, 2019 7:41 pm
Editorial Staff
PLC Tutorials
No Comments
Share
5 Min Read
SHARE

Your schedule Programmable Logic Controller Maintenance will depend on the controller’s environment – the harsher the environment the more frequent maintenance will be needed.

Contents
PLC MaintenanceWe recommend the following practices at least quarterly to keep your system in good operating condition:Backup PLC ProgramCheck LED IndicatorsReplace the BatteryCheck Operating EnvironmentCheck Operating VoltageCheck Program FunctionalityLook For Indications Of Overheated ComponentsClear Dust And Check VentingInspect Battery StatusCheck ConnectionsIdentify Updates NeededRemove Unnecessary ItemsAudit Parts In UseTake Inventory Of Replacement PartsArticles You May Like :100 PLC Projects ListPLC Math InstructionsPLC Tutorials and Ladder LogicsMultiple Choice Questions of PLCProgrammable Logic Controller Animation

Setting up a routine maintenance schedule will increase the longevity of your Programmable Logic Controllers (PLCs) and minimize the chance of system malfunction.

PLC Maintenance

PLC Maintenance Check Points

We recommend the following practices at least quarterly to keep your system in good operating condition:

They are as follows –

Backup PLC Program

Save a copy of your PLC program during routine maintenance to ensure a fairly up-to-date backup. In the event a PLC becomes inoperable and has to be replaced, this backup file can be downloaded onto a new PLC.

Check LED Indicators

Check the power and battery LED indicators. If the power LED indicator is off or flickering or if the battery LED indicator is on or flickering this may be a preliminary sign of a low battery or potential power issues.

Replace the Battery

If the Battery OK light is flickering or on, it is time to change the battery. Avoid catastrophic problems if you were to lose main control power by changing the battery regularly.

Check Operating Environment

Check temperature, humidity and other environmental factors to make sure that your PLC is operating within the proper conditions. Also make sure there is good airflow in the cabinet by cleaning filters in the enclosure.

Check Operating Voltage

Check the input voltage that is powering your PLC to make sure that the voltage is within the appropriate range and free from power spikes or ‘brown out’ conditions.

Check Program Functionality

During routine maintenance, check the functionality to make sure the system or equipment that is being controlled is operating as intended.

Look For Indications Of Overheated Components

Check the CPU and modules for distorted, warped, or discolored cases and burnt odors.

Clear Dust And Check Venting

Do not allow dirt and dust to accumulate on the PLC’s components. The central processing unit and I/O system are not designed to be dust proof. Check to be sure none of the PLC and module cooling vents are clogged or blocked by dust or debris.

Make sure that there is sufficient heat dissipation space around the PLC. If heat dissipation is obstructed, circuit malfunction can occur and if conductive dust reaches the electronic boards, it can cause a short circuit, resulting in possible permanent damage to the circuit board.

Inspect Battery Status

Check battery and replace if necessary.

Check Connections

Make sure that all communication cables, plugs, sockets, terminal strips, wiring and modules are connected properly.

If your PLC system is located in an area that experiences constant vibrations that could possible loosen terminal connections, perform this check more often and consider installing a vibration detector.

Identify Updates Needed

Check for any product notices, patches and upgrades and update as necessary.

Remove Unnecessary Items

Keep any items such as drawings, installation manuals or other materials away from the PLC system. Leaving these items on top of the CPU rack or other enclosures can obstruct airflow and create hot spots, ultimately causing a system malfunction.

Audit Parts In Use

Conduct an audit to check each component of your PLC system and determine if parts are good or need replacement.

Take Inventory Of Replacement Parts

Keep a stock of replacement parts on hand to minimize downtime resulting from component failure. Having the right spare in stock during a failure situation can result in shutdown for only minutes instead of hours or days.

Reference : qualitrol

Articles You May Like :

100 PLC Projects List

PLC Math Instructions

PLC Tutorials and Ladder Logics

Multiple Choice Questions of PLC

Programmable Logic Controller Animation

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 !
Communication between InTouch Scada and Allen Bradley PLC
Distributed Control System Interview Questions
PLC Program for Flow Totalizer
Alarm Acknowledge using PLC
PLC FBD Program for Bottle’s Capping with Rotating Mechanism
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
Leave a Comment

Leave a Reply Cancel reply

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

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
208kSubscribersSubscribe
38kFollowersFollow

Categories

Recent Comments

  • Guifty Shimica on Top Non-PLC Certification Courses for Automation Professionals
  • Guifty Shimica on Top Non-PLC Certification Courses for Automation Professionals
  • MIHARITSOA Aina Sitraka on Top Non-PLC Certification Courses for Automation Professionals
  • Vaishnavi on Free Instrumentation Course for Trainee Engineers

Related Articles

Connection between PLC and Contactor

Contactor – Basics, Wiring, Connection with PLC

Global Data Blocks in PLC

What is a Data Block? Global Data Blocks in PLC

Motor ON OFF Logic in PLC

Motor ON OFF Logic in PLC

Wiring-Connection-from-PLC-to-Solenoid-Valves

How to Connect a Solenoid Valve with PLC?

Omron PLC increment and decrement

Increment & Decrement Instructions in CX-Programmer (OMRON)

running two single-phase induction motors sequentially

Control Two Motors in Sequence after Time Delay – Circuit, Operation

What is Fail-safe in Siemens PLC?

What is Fail-safe in Siemens PLC?

HMI

Learn about SCADA and HMI Systems

More Articles

Encoder Principle

Encoder Working Principle

VPN for Control Engineers

How Important is VPN for Control Engineers?

Use of Temperature Transmitters instead of Direct Wiring

What is a Differential Mode Signal

Difference Between Differential Mode and Common Mode

Argonite Fire Suppression System Animation

Argonite Fire Suppression System Working Principle

Current Divider Rule

Current Divider Rule

PLC Multiple Choice Questions

PLC Multiple Choice Questions

Difference Between RCCB and MCCB

Difference Between RCCB and MCCB

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?