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.

---------->>>>>Get FREE PLC Programming Tips

New Here? Please read this important info!!!

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

PLC training tools sale

Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old March 22nd, 2012, 12:22 PM   #1

electro89 is offline
Join Date: Mar 2012
Location: Niagara Falls
Posts: 68
Codesys/Wago - Retain/ Persistent Variables

A couple questions regarding retentive and persistent variables in Codesys v2.3 using the wago 750-841. Cannot seem to find any information in the manual or online.

When I declare var_global retain persistent and give it a preset value like :=4, and I change it in online mode, the value is saved when I'm logged in but not when i'm logged out.
Also, if I were to change the value offline, it will still show me the value that was changed online.

Where is this data stored in the plc and is there a way to access it through codesys? I need someone to explain how the whole retentive memory thing works.

  Reply With Quote
Jump to Live PLC Question and Answer Forum


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
Beckhoff losing persistent data values twu026 LIVE PLC Questions And Answers 19 November 10th, 2016 01:53 AM
WinCC Flexible and refreshing the values of variables Iner LIVE PLC Questions And Answers 4 May 20th, 2010 05:39 AM
Accessing PLC Variables from WinCC V6.0 RMA LIVE PLC Questions And Answers 5 July 8th, 2008 07:07 AM
Help with iFix Variables. RPax LIVE PLC Questions And Answers 1 February 13th, 2006 12:17 PM
S7 - Archiving variables in ProTool Pro RMA LIVE PLC Questions And Answers 3 April 15th, 2005 07:20 AM

All times are GMT -5. The time now is 07:21 AM.