https://forge.codesys.com/forge/talk/Engineering/thread/935c4cda60/2020-02-27T14:02:02.510000ZRecent posts to CANopen Cia405.NMT timeout; how to resolve?2020-02-27T14:02:02.510000Z2020-02-27T14:02:02.510000Zeschwellingerhttps://forge.codesys.com/u/eschwellinger/https://forge.codesys.com28de949847058763d264e144351af20d6ced090c

<div class="markdown_content"><p>Hi,</p> <p>please do not workaround these issues you will never have a reliable working system,<br/> if you do not solve the root cause, the non reliable working CAN mini driver.<br/> It is not needed to protect the queue with semaphore!<br/> This CAN mini driver functionality need to be proved by the CAN-Echo project<br/> If SDO's stuck in the queue it might be a problem of wrong executed SDO fb's, but semaphores are never needed..</p> <p>BR<br/> Edwin</p></div>

2020-02-27T14:02:02.249000Z2020-02-27T14:02:02.249000Zchabhttps://forge.codesys.com/u/chab/https://forge.codesys.come8260fe8498946d1a778bf168084ed3702207b11

<div class="markdown_content"><p>Long time no see,</p> <p>The application with this work-around, has the issue again.<br/> The NMT function results in a TIME-OUT.<br/> Both NMT- and SDO- function are called with DISABLE, if a TIME-OUT occurs.<br/> But still the NMT keeps resulting in TIME-OUT.</p> <p>Can the CANopen Manager / stack keep the SDO queue blocked?<br/> And how can I reset the CANopen Manager / stack?</p> <p>Regards,<br/> Edwin</p></div>

2020-02-27T14:02:01.982000Z2020-02-27T14:02:01.982000Zchabhttps://forge.codesys.com/u/chab/https://forge.codesys.coma5cc5ac526add0e4273e4c64816cb993e3cd1a63

<div class="markdown_content"><p>Thank you for the relation between MNT and SDO (both in the Cia405 library).</p> <p>I resolved the issue by implemneting only one instance of the Cia405 functionblocks.<br/> (One NMT function block and one SDO function block.)</p> <p>And added a semaphore to allow the NMT or SDO function block enabled.<br/> (Both function blocks are executed! Only one is allowed to be enabled.) </p> <p>In addition, I added an 'error handler' which resets both function blocks, when an error occurs.</p> <p>Testing was succesful.</p></div>

2020-02-27T14:02:01.701000Z2020-02-27T14:02:01.701000ZModerator3Shttps://forge.codesys.com/u/moderator3s/https://forge.codesys.com55d807b75cb95613ce21ecff67e68a74d5ccba60

<div class="markdown_content"><p>Hi Edwin,</p> <p>the NMT fb will be aborted with a falling edge on the ENABLE Input.<br/> does'nt this solve your problem?<br/> If it does not abort even with falling edge you will see a timeout which means another fb blocks the internal SDO channel.</p> <p>Rule: Never execute StkClose and StkOpen function <br/> -&gt; this should never executed by the application.</p> <p>BR <br/> E.Schwellinger</p></div>

2020-02-27T14:02:00.808000Z2020-02-27T14:02:00.808000Zchabhttps://forge.codesys.com/u/chab/https://forge.codesys.com49453f1715490af4cc9fb9b4916a44b9b75872fe

<div class="markdown_content"><p>Hi all,</p> <p>In my application, in a particular situation, the NMT function keeps giving a time-out error. <br/> The CANopen master processes the PDO succesfully. And the other functions. </p> <p>Once the time-out occurs once. It never goes away! <br/> How can I resolve the time-outs?</p> <p>The NMT function does not have any "reset" posibility. Can I "reset" the NMT function.<br/> I checked the CANopen master reset / re-init function: StkClose and StkOpen function.<br/> StkClose is OK. But the StkOpen function, with the correct parameters, results in a PLC exception!</p> <p>Regards,<br/> Edwin.</p></div>