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
Old June 30th, 2010, 07:55 PM   #1
Simon Webber
South Africa

Simon Webber is offline
Join Date: May 2007
Location: Cape Town
Posts: 6
SLC 5/04 Processors Randomly 'Disconnecting' from the DH+ network.

Our plant has a DH+ network containing Allen Bradley SLC5/04 & Allen Bradley PLC 5 processors.
The intermittent problem we are having is that one of our SLC 5/04 processors will 'island' themselves from the DH+ network therefore not communicating with the rest of the plant.
To get it back onto the DH+ network we have to switch the processor from 'Stop' mode back into 'Run' mode.
The problem is not confined to one particular SLC 5/04 processor, it happens randomly with any one, somtimes two SLC 5/04 processor throughout the network at least once a week. Note that there are no problems with the PLC 5 processors.
While the SLC 5/04 processor is 'islanded', when I autobrowse the DH+ network using RS Linx,the fault code next to the 'islanded' SLC 5/04 processor shows: COMMS. ERROR 00000001. Has anyone any ideas why they are randomly throwing themselves off the network?
Attached Images
File Type: jpg Comm_Error.jpg (51.8 KB, 32 views)
  Reply With Quote
Old July 1st, 2010, 06:41 AM   #2
United States

brucechase is offline
brucechase's Avatar
Join Date: Sep 2004
Location: Augusta GA
Posts: 721
The only time I have had 5/04 drop off the network like you are describing is when I did not have a terminating resistor at both ends. It would just randomly drop off the processors.

I'm sure others will chime in on some of the other problems you need to check for.
  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
Allen Bradley Basic Card XEV2005 LIVE PLC Questions And Answers 19 March 22nd, 2012 02:28 PM
Link SLC 5/04 with SLC 5/03 SeanLee LIVE PLC Questions And Answers 26 August 4th, 2009 12:52 PM
connecting SLC 5/04 to Panelview through rs232 Bcon1006 LIVE PLC Questions And Answers 3 March 4th, 2007 09:24 AM
SLC 5/04, communication instruction ade LIVE PLC Questions And Answers 6 March 16th, 2005 07:31 AM
AB CTC units..with 2 SLC 5/04 DH+ Russ LIVE PLC Questions And Answers 4 December 15th, 2004 04:02 PM

All times are GMT -5. The time now is 08:24 AM.