Control Net Error Codes
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Tips New Here? Please read this important info!!! PLCS.net - Interactive Q & A > PLCS.net - Interactive Q & A > LIVE PLC Questions And Answers ControlNet Communications Timeout Problems User Name Remember Me? Password Register FAQ Calendar Downloads PLC 1756-cnb error codes Reviews PLCS.net Store Today's Posts Search Search Forums Show Threads Show Posts Advanced Search Go to rsnetworx for controlnet scheduling Page... Thread Tools Display Modes June 21st, 2008, 12:33 AM #1 mlkramer2 Member Join Date: Jun 2008 Location: Detroit Posts: 9 ControlNet 1756-cnb user manual Communications Timeout Problems Any help on this would be GREATLY appreciated! I have an AB controlnet network with ten racks. I am occasionally getting failures, currently about once every two days where a rack or racks will simply stop communicating. The only
1756-cnb/e Error Codes
way to bring them back is to reset the controlnet bridge module (pull it out and put it back in). This network is controlling a reheat furnace which can be up to 2500 degrees, so these comm issues can be VERY unpleasant. I sometimes have multiple racks at various points along the network fail simultaneously, other times it will be just one at any point along the network. I set up some error trapping logic today and had a rack fail this evening and rsnetworx for controlnet tutorial it gave me fault codes of 515 and 516, which I believe are communications timeouts. I used to have continuous errors of all kinds on the network, until we went through and replaced every connector (sloppy installation work) and now I don't get any until I have a complete failure of a rack. Does anybody have any fixes for this or common experiences? Is there a way for me to increase the timeout time? Thanks in advance.... mlkramer2 View Public Profile Find More Posts by mlkramer2 June 21st, 2008, 02:29 AM #2 Ken Roach Lifetime Supporting Member + Moderator Join Date: Apr 2002 Location: Seattle, WA Posts: 12,720 If it were my system, I'd go after like this: 1. Eliminate possible bad backplane bridge chips. This is RA product service advisory from May 2007 that every RA technician and engineer is familiar with. 2. Check for more noise or bad packets that may remain after your media repairs. Use the ControlNet Netchecker and a pad of paper to note the signal conditions as the system operates, and take notes if the signal changes when specific machinery is operating. Do a wiggle-test walkthrough of the system while the NetChecker is attached. Attach an oscilloscope to the NetChecker and examine the actual waveform of the ControlNet. 3. Use RSLinx as well as the ControlLogix Task Monitor to monitor the network statistics of all your 1756-CNB's. 4. Use your controller to monitor the network statistics of all your
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1756-cn2
Supporting Devices Allen Bradley 16#0004 Connection Request Error:Bad Segment Sign in to follow this Followers 0 16#0004 Connection Request Error:Bad Segment Started by DoubleL, 20 Jan 2009 4 posts in this topic DoubleL 0 Sparky MrPLC Member http://www.plctalk.net/qanda/showthread.php?t=40012 0 34 posts Georgia Posted 20 Jan 2009 Hi Guys, I am having a problem with my ControlNet. I tried to add another module to the PLC program and schedule it. It didn't work the first time so I deleted the module and tried again. This time everything on the ControlNet stopped communicating and I get an error 16#0004 Connection Request Error: Bad segment on the CNB card. Any ideas? I've tried everything that I could think http://forums.mrplc.com/index.php?/topic/15784-160004-connection-request-errorbad-segment/ of. I am using a ControlLogix 5561 processor with a 1756 CNB/E controlnet card. I have several 1794 ANC15's (one of which I was trying to add) and several PowerFlex drives on the network. Thanks, DoubleL Share this post Link to post Share on other sites controlsdude 0 Sparky MrPLC Member 0 69 posts United States Posted 23 Jan 2009 Code String Explanation and Possible Causes/Solutions 16#0004 Connection Request Error: Bad Segment The controller is attempting to make a connection to the module and has received an error.ยง Call Technical Support says to call technical support? Sounds like your dead in the water on this error. Go here check your firmware/software level http://www.rockwellautomation.com/support/firmware.html You did not say what Release or version you were on for RSLogix5000 and RsNetworx? 1 Just make sure that whatever hardware software using is on the same CPR level. 2 Do you see the new hardware under RsLinx? What is the firmware version of the new hardware? 3 Does the new hardware schedule in an offline configuration under RsNetworx? Do you know how to do this? Go here check this video out to run offline http://www.rockwellautomation.com/knowledgebase/ and search for ID 54793 4 Now that it can schedule under offline, do you know how to schedule online? Do you have a procedure? What is it? Is it full proof? What parameters on schedule did you g