troubleshooting plc problems at site ~ learn free plc programming, ladder programming, hmi...
TRANSCRIPT
5/19/13 Troubleshooting PLC Problems at Site ~ Learn Free PLC Programming, Ladder Programming, HMI Programming, SCADA Tutorials
www.automation-talk.info/2011/03/troubleshooting-plc-problems-at-site.html 1/5
Learn Free PLC Programming, Ladder Programming, HMI Programming, SCADA Tutorials
Make money blogging Customer Survey
Troubleshooting PLC Problems at Site3/22/2011 09:56:00 PM | PLC, Tips, Tutorial | 2 comments »
PLC Troubleshooting is the part which every Automation/PLC engineer has to master to
become a good PLC Engineer. Identifying the PLC problems and proceeding for correct
solution is a must to ensure proper running of the system. PLC installed for Critical
applications and process need to be trouble free and should have high response time.
Here in this article we will discuss about the common troubleshooting tips which will be
advantage when PLC engineer goes to site for troubleshooting PLC.
How to Troubleshoot PLC at Site :-
Many a time it happens that after the Installation of PLC panel at customer site and
commissioning it properly , a problem may arise after some time. The problem can be
in Inputs/Outputs connected to PLC or in field wiring or lose connections or even due to
malfunctioning of PLC. But for all the above problems customer always calls PLC
engineer to solve it out , as client always thinks that there is some issue with PLC.
So its the core responsibility of PLC engineer to identify the problem and solve it out.
TweetTweet 289 0
Like 270
Email Subscription
SearchHome SCADA PLC Program Manuals MODBUS PLC Jobs
5/19/13 Troubleshooting PLC Problems at Site ~ Learn Free PLC Programming, Ladder Programming, HMI Programming, SCADA Tutorials
www.automation-talk.info/2011/03/troubleshooting-plc-problems-at-site.html 2/5
Troubleshooting with PLC related issues is the thing which we are going to discuss
today.
The first thing need to be checked is that first we should identify the source of problem
that whether it is due to inputs/outputs or PLC internal hardware. Connect the Laptop
and check each and every Input first in the PLC Program. If any input is not coming then
check the reason for it. Similarly repeat the above procedure for all outputs. The reason
for any Input signal not showing in PLC Program can be due to loose connection or
malfunctioning of particular Input , so rectify the same.
Also if the output command is on from the PLC program but if it is not operating then
again the loose connections can be the issue or malfunctioning of field device , so
check it one oby one for each output device connected to PLC. If all the input and output
devices are OK but still the system is not operating then we have to proceed further. The
problem can be in the PLC I/O module or it can be even the processor issue.
Experience has shown that more than 80% of the problems are due to malfunctioning of
PLC CPU/Processor.Subscribe to Automation-Talk by Email
Now let us look out for the possible methods to check out the PLC Internal problems.
First of all visually look out for the integrity of PLC power and ground.If ground is not
connected than connect it and using the multimeter measure the voltage between the
PLC ground and some other known ground , both AC and DC voltage should be zero
between these two ground points.
After this check out the PLC Power supply , make sure that it is between the permissible
range for PLC input range. If the PLC is operating by DC Power supply then also look
out for AC ripples in DC Supply , it can be done using a digital meter . Due to AC ripples
in DC supply have drastic effects on the operation of the microprocessors and memory
devices typically found in PLC processors.
Finding Out PLC CPU/Processor Internal Issues
The final thing to be checked is the voltage of battery in the PLC , battery power is
required to hold and maintain the PLC data words and Internal Memory. Other reasons
for the abnormal behavior can be the Electro-Magnetic Interference or Radio
Frequency Interference. Check out that is there anf Larger rating motor start up in the
nearby environment , arc welding , lighting strikes or any use of radio transmitters. Try to
Get New Updates
Enter your email address:
Subscribe
Delivered by FeedBurner
Free Download
Allen Bradley Micrologix 1100User Manual
Delta HMI Screen Editor
Delta PLC Software -WPLSOFT
NP Designer Software
NQ Designer Software
NS Runtime Software
Free E Books For Engineers
Featured Resources:
International Railway Journal
Is f irst in global coverage of the Railw ay
Industry. >>
Qmed Daily
Devicelink.com and Medical Device &
Diagnostic Industry magazine celebrate their
30th anniversary w ith a daily new sletter
covering the latest new s in the medical
device industry w orldw ide. >>
► PLC Programming
► Mitsubishi PLC
► PLC Ladder Logic
► Automation PLC
► HMI Programming
► PLC Software
5/19/13 Troubleshooting PLC Problems at Site ~ Learn Free PLC Programming, Ladder Programming, HMI Programming, SCADA Tutorials
www.automation-talk.info/2011/03/troubleshooting-plc-problems-at-site.html 3/5
Like 4 TweetTweet 1 2
correlate the abnormal behavior of PLC CPU with these issues.
Although these things may seem harmless to PLC but they can sometimes a big
problem for PLC CPU to operate it properly .To solve out these types of problem the only
thing which can be done is power wiring conditioning, grounding, and shielding.
We will be discussing more about the PLC realted Troubleshooting Tips and Tricks , till
then you can subscribe to get all updates in yours Inbox.Subscribe to Automation-Talk
by Email.
Advertisements :-
Popular PLC Programs
PLC Programming ForCounting Encoder Pulses
How To Make Start Stop LogicIn PLC Using Different NO-NCcombination
Auto Mains Failure PLCProgram Using Omron PLC
PLC Analog Input Wiring andPLC Programming
Lubrication System PLCProgramming Using OmronPLC CP1E
PLC Program For Omron ServoDrive to Run Through PLC
PLC Program For OmronEncoder Interfacing WithOmron PLC
Omron NT11 HMIProgramming for LubricationSystem
PLC Program For ChangingScreen in Omron HMI NT11
Blog Archive
Blog Archive
Popular Posts
PLC AnalogInput Wiring andPLCProgramming
NV Designer
Omron CJ1M ProgrammingManual
Omron CPM2A ProgrammingManual
Omron MX Drive User Manual
Omron PLC CP1EProgramming Manual
Latest Post
Categories
Tutorial (122)
PLC (104)
Omron (77)
Programming (46)
HMI (43)
Tips (43)
SCADA (41)
Manual (38)
Delta (23)
Baldor (22)
MODBUS (18)
Programming Cables (18)
Software (16)
Variable Frequency Drive (15)
INTOUCH (14)
Loading...
5/19/13 Troubleshooting PLC Problems at Site ~ Learn Free PLC Programming, Ladder Programming, HMI Programming, SCADA Tutorials
www.automation-talk.info/2011/03/troubleshooting-plc-problems-at-site.html 4/5
Related Posts : PLC, Tips, Tutorial
Automation Talk
Like You like this.
You and 270 others like Automation Talk.
Facebook social plugin
2 comments
kuldeep rao // October 3, 2011 at 1:43 AM
nice inforamation :)
Injy // October 4, 2011 at 7:36 PM
Thnks Kuldeep.. Keep Reading
Post a Comment
Post a Comment
Free PLC Programming
Software For DELTA
How To Remove
Omron PLC
Password
Download
Omron PLC
CP1E User
Manual/Programming Manual
and Review
I/O Addressing Format in
Omron PLC
Download
Siemens LOGO
Software
PLC
Programming
For Counting
Encoder Pulses
Use Counter as Timer inOmron Zen PLC Programming
BlogCatalog
AC Motor (13)
Automation News (13)
Presentation (13)
Allen Bradley (12)
Mitsubishi (11)
Sensor (9)
Servo Drive (9)
Encoder (8)
GSM MODEM (7)
OPC (6)
AT Command (5)
Serial Communication (5)
Induction Motor (4)
RSView32 (3) ► Siemens PLC ► PLC Control ► PLC Program ► Omron PLC
5/19/13 Troubleshooting PLC Problems at Site ~ Learn Free PLC Programming, Ladder Programming, HMI Programming, SCADA Tutorials
www.automation-talk.info/2011/03/troubleshooting-plc-problems-at-site.html 5/5
Newer Post Older Post
Enter your comment...
Comment as: Google Account
Publish Preview
Home
Subscribe to: Post Comments (Atom)
Free Business and Tech Magazines and eBooks
Mobile Video Collaboration: The New Business Reality - This executive briefdiscusses trends in video conferencing on mobile devices, presents IDC's...Request Free!
Related Results1. w w w .InternetCorkBoard.comLooking for Troubleshooting PLC
Problems At Site ~ Learn Free PLCProgramming, Ladder Programming, HMIProgrammi?
Top answers for Troubleshooting PLC Problems At Site ~ Learn Free PLCProgramming, Ladder Programming, HMI Programmi
Chitika | Opt out?
Copyright 2012 | Automation-Talk | Contact Us | Partner :- Final Year Projects | Disclaimer | Jump to TOP