You are not registered yet. Please click here to register!


 
 
plc storereviewsdownloads
This board is for PLC Related Q&A ONLY. Please DON'T use it for advertising, etc.
 
Try our online PLC Simulator- FREE.  Click here now to try it.

New Here? Please read this important info!!!


Go Back   PLCS.net - Interactive Q & A > PLCS.net - Interactive Q & A > LIVE PLC Questions And Answers

Reply
 
Thread Tools Display Modes
Old October 11th, 2010, 03:20 PM   #1
STL???
Member
United Kingdom

STL??? is offline
 
Join Date: Sep 2005
Location: UK
Posts: 879
CE Certification & PLC Programming

Hi,
A question for the machine builders/OEM's on here.

I understand that from a hardware point of view that any modification to either the functionality or safety system would require re-assesssment but what about the software side?

If the functionality was the same but additional programming was added to enhance diagnostics would this void Certification?

What about panel upgrades for obsolete units?

Appreciate your thoughts on this

thanks
  Reply With Quote
Old October 11th, 2010, 03:56 PM   #2
rigicon
Member
United Kingdom

rigicon is offline
 
rigicon's Avatar
 
Join Date: Aug 2009
Location: kent
Posts: 415
Are you refering to programmable safety controllers.
If so any change to the program after sign off must be revalidated and submitted as the program becomes hardcoded documentation and most controllers can lock the program in.
As long as the changes are made public and a risk assessment is undertaken there won't be an issue - yes re-assessment.
PLC changes are not as strict and normally as long as hard wiring is unaltered will only require a risk assessment by a qualified competent person.
This is a generalization.
__________________
Artificial Intelligence - Genuine programmers headache

  Reply With Quote
Old October 11th, 2010, 04:36 PM   #3
STL???
Member
United Kingdom

STL??? is offline
 
Join Date: Sep 2005
Location: UK
Posts: 879
Hi - thanks for your reply.

For clarity i mean if you modify a PLC program (not Failsafe PLC)

So what i would like to know is at what point could a program change affect the CE certifcate if any?

I personally dont see a problem providing the machine functionality stays as per supplied.
  Reply With Quote
Old October 12th, 2010, 06:46 AM   #4
Stevie_S
Member
Wales

Stevie_S is offline
 
Stevie_S's Avatar
 
Join Date: Aug 2002
Location: Watford
Posts: 24
We had a training session on this subject last week (cheers bloke from Wemtech!) and as far as I understand, providing the PLC change doesn't alter the intended functionality of the machine or alter the safety aspects of it, then no further action is required.

As for panel upgrades on obsolete units, does the unit have a declaration of conformity in the first place? If it wasn't CE marked and you make any modifications to it, then you have to do the assessment for the whole shooting match.

SS
  Reply With Quote
Old October 12th, 2010, 12:39 PM   #5
STL???
Member
United Kingdom

STL??? is offline
 
Join Date: Sep 2005
Location: UK
Posts: 879
thanks Stevie_S
  Reply With Quote
Reply
Jump to Live PLC Question and Answer Forum

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Topics
Thread Thread Starter Forum Replies Last Post
IEC standard for PLC Programming vadrevukamarajsarma LIVE PLC Questions And Answers 5 September 7th, 2017 03:09 AM
Festo PLC Programming Homam Al-Othman LIVE PLC Questions And Answers 5 April 10th, 2014 03:49 AM
Programming Premium PLC via Ethernet Schtiel LIVE PLC Questions And Answers 3 November 8th, 2006 04:01 PM
Help in PLC Programming Kirsten LIVE PLC Questions And Answers 4 November 3rd, 2006 07:53 AM
PLC programming software workarounds jdbrandt LIVE PLC Questions And Answers 17 April 12th, 2003 10:51 AM


All times are GMT -4. The time now is 10:32 AM.


.