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.mw-parser-output .wpbs .wpb .wpb-main,html.skin-theme-clientpref-night .mw-parser-output .wpbs .wpb-header{background-color:#302f2d}html.skin-theme-clientpref-night .mw-parser-output .wpbs .banner-shell-inner{background-color:#2e2505}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .wpb-category-box{background-color:#0a0a0a}html.skin-theme-clientpref-os .mw-parser-output .wpbs .wpb .wpb-main,html.skin-theme-clientpref-os .mw-parser-output .wpbs .wpb-header{background-color:#302f2d}html.skin-theme-clientpref-os .mw-parser-output .wpbs .banner-shell-inner{background-color:#2e2505}}</style><table class="tmbox tmbox-notice mw-collapsible innercollapse wpb wpb-table"><tbody><tr class="wpb-header"><td class="wpb-header-icon"><span typeof="mw:File"><a href="/wiki/File:Crystal_kcontrol.svg" class="mw-file-description"><img alt="WikiProject icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Crystal_kcontrol.svg/25px-Crystal_kcontrol.svg.png" decoding="async" width="25" height="25" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Crystal_kcontrol.svg/38px-Crystal_kcontrol.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Crystal_kcontrol.svg/50px-Crystal_kcontrol.svg.png 2x" data-file-width="128" data-file-height="128"/></a></span></td><td class="wpb-header-combined"><a href="/wiki/Wikipedia:WikiProject_Computing" title="Wikipedia:WikiProject Computing">Computing</a><span class="wpb-nested-task-force">: <a href="/wiki/Wikipedia:WikiProject_Computing/Task_forces/Networking" class="mw-redirect" title="Wikipedia:WikiProject Computing/Task forces/Networking">Networking</a></span> <span class="wpb-header-bubbles import-low">Low‑importance</span></td></tr><tr><td class="mbox-text wpb-main" colspan="2"><table><tbody><tr><td class="mbox-image wpb-image"><span typeof="mw:File"><a href="/wiki/File:Crystal_kcontrol.svg" class="mw-file-description"><img alt="WikiProject icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Crystal_kcontrol.svg/70px-Crystal_kcontrol.svg.png" decoding="async" width="70" height="70" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Crystal_kcontrol.svg/105px-Crystal_kcontrol.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Crystal_kcontrol.svg/140px-Crystal_kcontrol.svg.png 2x" data-file-width="128" data-file-height="128"/></a></span></td><td class="mbox-text">This article is within the scope of <b><a href="/wiki/Wikipedia:WikiProject_Computing" title="Wikipedia:WikiProject Computing">WikiProject Computing</a></b>, a collaborative effort to improve the coverage of <a href="/wiki/Computer" title="Computer">computers</a>, <a href="/wiki/Computing" title="Computing">computing</a>, and <a href="/wiki/Information_technology" title="Information technology">information technology</a> on Wikipedia. If you would like to participate, please visit the project page, where you can join <a href="/wiki/Wikipedia_talk:WikiProject_Computing" title="Wikipedia talk:WikiProject Computing">the discussion</a> and see a list of open tasks.<span class="metadata wpb-metadata"><span class="wpb-project">Computing</span><span class="wpb-project_link">Wikipedia:WikiProject Computing</span><span class="wpb-banner_name">Template:WikiProject Computing</span><span class="wpb-assessment_cat">Computing articles</span></span></td><td class="mbox-empty-cell"></td></tr><tr><td class="assess import-low"><a href="/wiki/Category:Low-importance_Computing_articles" title="Category:Low-importance Computing articles">Low</a></td><td class="mbox-text" colspan="2">This article has been rated as <b>Low-importance</b> on the <a href="/wiki/Wikipedia:WikiProject_Computing/Assessment#Importance_scale" title="Wikipedia:WikiProject Computing/Assessment">project's importance scale</a>.</td></tr><tr><td><figure class="mw-default-size mw-halign-center" typeof="mw:File"><a href="/wiki/File:Bus_icon.svg" class="mw-file-description"><img alt="Taskforce icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/ca/Bus_icon.svg/42px-Bus_icon.svg.png" decoding="async" width="42" height="25" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/ca/Bus_icon.svg/64px-Bus_icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/ca/Bus_icon.svg/84px-Bus_icon.svg.png 2x" data-file-width="125" data-file-height="75"/></a><figcaption></figcaption></figure></td><td class="mbox-text" colspan="2">This article is supported by <b><a href="/wiki/Wikipedia:WikiProject_Computing/Task_forces/Networking" class="mw-redirect" title="Wikipedia:WikiProject Computing/Task forces/Networking">Networking task force</a></b> (assessed as <a href="/wiki/Category:Low-importance_Computer_networking_articles" title="Category:Low-importance Computer networking articles">Low-importance</a>).</td></tr></tbody></table></td></tr></tbody></table></td></tr></tbody></table> <meta property="mw:PageProp/toc"/> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="other" data-mw-thread-id="h-other"><span data-mw-comment-start="" id="h-other"></span>other<span data-mw-comment-end="h-other"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:CANopen&action=edit&section=1" title="Edit section: other"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>I think a few examples are extremely helpful. I added the CANOpen master querying a CANopen slave for current values, can someone please add how to configure a Node address? </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="4_TPDO's_and_4_RPDO's" data-mw-thread-id="h-4_TPDO's_and_4_RPDO's-2008-01-02T14:38:00.000Z"><span id="4_TPDO.27s_and_4_RPDO.27s"></span><span data-mw-comment-start="" id="h-4_TPDO's_and_4_RPDO's-2008-01-02T14:38:00.000Z"></span>4 TPDO's and 4 RPDO's<span data-mw-comment-end="h-4_TPDO's_and_4_RPDO's-2008-01-02T14:38:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:CANopen&action=edit&section=2" title="Edit section: 4 TPDO's and 4 RPDO's"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Rene.heijma-2008-01-02T14:38:00.000Z-4_TPDO's_and_4_RPDO's"></span>It says in the PDO section that there are 4 TPDO's and 4 RPDO's. This needs some clarification. AFAIK 4 is a default value. But what if a device only has one value to produce? Or is it is a device that produces data to many other devices? </p><p>My feeling is that this part needs some additions. <small>—Preceding <a href="/wiki/Wikipedia:Signatures" title="Wikipedia:Signatures">unsigned</a> comment added by <a href="/w/index.php?title=User:Rene.heijma&action=edit&redlink=1" class="new" title="User:Rene.heijma (page does not exist)">Rene.heijma</a> (<a href="/w/index.php?title=User_talk:Rene.heijma&action=edit&redlink=1" class="new" title="User talk:Rene.heijma (page does not exist)">talk</a> • <a href="/wiki/Special:Contributions/Rene.heijma" title="Special:Contributions/Rene.heijma">contribs</a>) <a href="https://en.wikipedia.org/wiki/Talk:CANopen#c-Rene.heijma-2008-01-02T14:38:00.000Z-4_TPDO's_and_4_RPDO's" class="ext-discussiontools-init-timestamplink">14:38, 2 January 2008 (UTC)</a></small><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Rene.heijma-2008-01-02T14:38:00.000Z-4_TPDO's_and_4_RPDO's"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Rene.heijma-2008-01-02T14:38:00.000Z-4_TPDO's_and_4_RPDO's"></span> </p><p>This is the number of default PDOs per device. The default TPDO mapping uses following COB-ID:s in sub-indexes 01h:<br/> 1800h: 180h + Node-ID (PDO1)<br/> 1801h: 280h + Node-ID (PDO2)<br/> 1802h: 380h + Node-ID (PDO3)<br/> 1803h: 480h + Node-ID (PDO4)<br/> </p><p>Of course you could use something else than Node-ID to sum there. But then you would quickly lose track on possible fieldbus conflict situations. Now you got the benefit of always knowing, where the TPDO arrives to the bus from. Correspondingly, if you need to receive TPDO1 in some node, you could configure RPDO1 if you know the node-id of the sending node. </p><p>But sometimes four isn't enough; then it's ok to use PDOs from 1800h to 19FFh. So actually, we aren't limited to four PDOs at all.[CiA DS-301]. </p><p>-Mikko Laakso </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id=""Upload/download"_ambiguity" data-mw-thread-id="h-"Upload/download"_ambiguity"><span id=".22Upload.2Fdownload.22_ambiguity"></span><span data-mw-comment-start="" id="h-"Upload/download"_ambiguity"></span>"Upload/download" ambiguity<span data-mw-comment-end="h-"Upload/download"_ambiguity"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:CANopen&action=edit&section=3" title="Edit section: "Upload/download" ambiguity"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In control system parlance (ie PLCs), "download" means to send data away from you to another device - which is the opposite of its more common internet used where "download" means to bring data to you. So the description below is ambiguous and a diagram would be really helpful, if anyone has one. </p> <blockquote> <p>The SDO protocol is used to set and read values from the object directory of a remote device. The device whose object directory is accessed is the SDO server and the device accessing the remote device is the SDO client. The communication is always initiated by the SDO client. In CANopen terminology, communication is viewed from the SDO server, so that a read from an object directory results in an SDO <b>upload</b> and a write to directory is an SDO <b>download</b>. </p> </blockquote> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="What_is_"M/O"?" data-mw-thread-id="h-What_is_"M/O"?-2011-12-19T14:05:00.000Z"><span id="What_is_.22M.2FO.22.3F"></span><span data-mw-comment-start="" id="h-What_is_"M/O"?-2011-12-19T14:05:00.000Z"></span>What is "M/O"?<span data-mw-comment-end="h-What_is_"M/O"?-2011-12-19T14:05:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:CANopen&action=edit&section=4" title="Edit section: What is "M/O"?"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Mortense-2011-12-19T14:05:00.000Z-What_is_"M/O"?"></span>In the first table, "M/O" is not defined. It is likely to be "Mandatory/Optional" --<a href="/wiki/User:Mortense" title="User:Mortense">Mortense</a> (<a href="/wiki/User_talk:Mortense" title="User talk:Mortense">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:CANopen#c-Mortense-2011-12-19T14:05:00.000Z-What_is_"M/O"?" class="ext-discussiontools-init-timestamplink">14:05, 19 December 2011 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Mortense-2011-12-19T14:05:00.000Z-What_is_"M/O"?"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Mortense-2011-12-19T14:05:00.000Z-What_is_"M/O"?"></span> </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="What_is_the_SDO_block_transfer_performance_advantage?" data-mw-thread-id="h-What_is_the_SDO_block_transfer_performance_advantage?-2011-12-19T14:36:00.000Z"><span id="What_is_the_SDO_block_transfer_performance_advantage.3F"></span><span data-mw-comment-start="" id="h-What_is_the_SDO_block_transfer_performance_advantage?-2011-12-19T14:36:00.000Z"></span>What is the SDO block transfer performance advantage?<span data-mw-comment-end="h-What_is_the_SDO_block_transfer_performance_advantage?-2011-12-19T14:36:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:CANopen&action=edit&section=5" title="Edit section: What is the SDO block transfer performance advantage?"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Mortense-2011-12-19T14:36:00.000Z-What_is_the_SDO_block_transfer_performance_advantage?"></span>In "The SDO block transfer is a newer addition to standard, which allows large amounts of data to be transferred with slightly less protocol overhead." it would be nice to have "slightly less" quantified (e.g. is it 1%, 10% or 30% given some message sizes, etc.) --<a href="/wiki/User:Mortense" title="User:Mortense">Mortense</a> (<a href="/wiki/User_talk:Mortense" title="User talk:Mortense">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:CANopen#c-Mortense-2011-12-19T14:36:00.000Z-What_is_the_SDO_block_transfer_performance_advantage?" class="ext-discussiontools-init-timestamplink">14:36, 19 December 2011 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Mortense-2011-12-19T14:36:00.000Z-What_is_the_SDO_block_transfer_performance_advantage?"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Mortense-2011-12-19T14:36:00.000Z-What_is_the_SDO_block_transfer_performance_advantage?"></span> </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="No._of_Nodes" data-mw-thread-id="h-No._of_Nodes-2011-12-22T11:02:00.000Z"><span data-mw-comment-start="" id="h-No._of_Nodes-2011-12-22T11:02:00.000Z"></span>No. of Nodes<span data-mw-comment-end="h-No._of_Nodes-2011-12-22T11:02:00.000Z"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Talk:CANopen&action=edit&section=6" title="Edit section: No. of Nodes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-62.216.165.53-2011-12-22T11:02:00.000Z-No._of_Nodes"></span>"The CANopen standard divides the 11-bit CAN frame id into a 4-bit function code and 7-bit CANopen node id. This limits the number of devices in a CANopen network to 127." </p><p>7-bit are good enough for 128 nodes!? --<a href="/wiki/Special:Contributions/62.216.165.53" title="Special:Contributions/62.216.165.53">62.216.165.53</a> (<a href="/w/index.php?title=User_talk:62.216.165.53&action=edit&redlink=1" class="new" title="User talk:62.216.165.53 (page does not exist)">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:CANopen#c-62.216.165.53-2011-12-22T11:02:00.000Z-No._of_Nodes" class="ext-discussiontools-init-timestamplink">11:02, 22 December 2011 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-62.216.165.53-2011-12-22T11:02:00.000Z-No._of_Nodes"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-62.216.165.53-2011-12-22T11:02:00.000Z-No._of_Nodes"></span> </p> <dl><dd><span data-mw-comment-start="" id="c-JuergenKlueser-2011-12-22T18:45:00.000Z-62.216.165.53-2011-12-22T11:02:00.000Z"></span>In this context the 0 is reserved for "all nodes". But do not misunderstand: This id split is only in the pre-defined connection. Since ids of PDOs can be configured, the rule is not always true. --<a href="/wiki/User:JuergenKlueser" title="User:JuergenKlueser">JuergenKlueser</a> (<a href="/wiki/User_talk:JuergenKlueser" title="User talk:JuergenKlueser">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:CANopen#c-JuergenKlueser-2011-12-22T18:45:00.000Z-62.216.165.53-2011-12-22T11:02:00.000Z" class="ext-discussiontools-init-timestamplink">18:45, 22 December 2011 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-JuergenKlueser-2011-12-22T18:45:00.000Z-62.216.165.53-2011-12-22T11:02:00.000Z"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-JuergenKlueser-2011-12-22T18:45:00.000Z-62.216.165.53-2011-12-22T11:02:00.000Z"></span></dd></dl>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Talk:CANopen&oldid=1200603738">https://en.wikipedia.org/w/index.php?title=Talk:CANopen&oldid=1200603738</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:C-Class_Computing_articles" title="Category:C-Class Computing articles">C-Class Computing articles</a></li><li><a href="/wiki/Category:Low-importance_Computing_articles" title="Category:Low-importance Computing articles">Low-importance Computing articles</a></li><li><a href="/wiki/Category:C-Class_Computer_networking_articles" title="Category:C-Class Computer networking articles">C-Class Computer networking articles</a></li><li><a href="/wiki/Category:Low-importance_Computer_networking_articles" title="Category:Low-importance Computer networking articles">Low-importance Computer networking articles</a></li><li><a href="/wiki/Category:C-Class_Computer_networking_articles_of_Low-importance" title="Category:C-Class Computer networking articles of Low-importance">C-Class Computer networking articles of Low-importance</a></li><li><a href="/wiki/Category:All_Computer_networking_articles" title="Category:All Computer networking articles">All Computer networking articles</a></li><li><a href="/wiki/Category:All_Computing_articles" title="Category:All Computing articles">All Computing articles</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 29 January 2024, at 21:48<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. 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