{"id":2822,"date":"2020-08-23T07:24:30","date_gmt":"2020-08-23T07:24:30","guid":{"rendered":"http:\/\/bryceautomation.com\/?p=2822"},"modified":"2020-08-23T07:24:30","modified_gmt":"2020-08-23T07:24:30","slug":"controllogix-1756-dhrio-module","status":"publish","type":"post","link":"https:\/\/bryceautomation.com\/index.php\/2020\/08\/23\/controllogix-1756-dhrio-module\/","title":{"rendered":"ControlLogix 1756-DHRIO Module"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Introduction to the ControlLogix 1756-DHRIO Module<\/h3>\n\n\n\n<p>The ControlLogix 1756-DHRIO module allows you to interface with the older Data Highway Plus (DH+) Network.  You can also connect to a maximum of four Remote I\/O Racks per channel.  Each 1756-DHRIO module has 2 ports.  Each of which will support DH+ or Remote I\/O protocol.<\/p><div id=\"bryce-234487816\" class=\"bryce-afterfirst bryce-entity-placement\"><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-8316758073402323\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-8316758073402323\" \ndata-ad-slot=\"7728240895\" \ndata-ad-format=\"auto\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"480\" height=\"640\" data-src=\"https:\/\/bryceautomation.com\/wp-content\/uploads\/2020\/08\/dhriomodule.jpg\" alt=\"\" class=\"wp-image-2823 lazyload\" data-srcset=\"https:\/\/bryceautomation.com\/wp-content\/uploads\/2020\/08\/dhriomodule.jpg 480w, https:\/\/bryceautomation.com\/wp-content\/uploads\/2020\/08\/dhriomodule-225x300.jpg 225w\" data-sizes=\"(max-width: 480px) 100vw, 480px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 480px; --smush-placeholder-aspect-ratio: 480\/640;\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Network Setup<\/h3>\n\n\n\n<p>Whenever you set up a network to the DHRIO module, the recommended cable to use is Belden 9463.  Most people will refer to this as &#8220;Blue Hose&#8221;.  The Series B module supports a maximim communication speed of 57.6 Kbps.  Conversely, the Series C module supports a maximum of 230.4 Kbps.  With this in mind, the higher the network speed is, the shorter your maximum distance becomes.   This is due to capacitance on the network cable.<\/p>\n\n\n\n<p>The blue hose is a 2 conductor cable with shield.   Remember that when you wire up a network, the blue conductor is wired to terminal #1 for Remote I\/O networks.  Connect the clear conductor to terminal #1 for DH+ Networks.   This will help you to keep track of which cables are for Remote I\/O, and which cables are for DH+.  You will daisy chain the network from one node to another.   In other words, do not use a star topology.   Each terminal on a plug will have 2 conductors:  One coming in from the previous node, and one going out to the next node.   Both ends of the network will have a termination resistor.  Remember DH+ supports a maximum of 64 modes (0-77 octal), and remote I\/O supports a maximum of 4 racks per channel.<\/p>\n\n\n\n<p>Keep the following specifications in mind.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Baud Rate<\/strong><\/td><td><strong>Maximum Distance<\/strong><\/td><td><strong>Terminator Value<\/strong><\/td><\/tr><tr><td>57.6 K<\/td><td>10,000&#8242;<\/td><td>150 Ohms<\/td><\/tr><tr><td>230.4 K<\/td><td>2,500&#8242;<\/td><td>82 Ohms<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Configure the ControlLogix 1756-DHRIO Module<\/h3>\n\n\n\n<p>Before inserting the module in the chassis, be sure to adjust the settings on the module.<\/p>\n\n\n\n<p>The first step is to set the mode of each channel.  You will set each channel for either DH+ or remote I\/O mode.   Remember,  the Series C module supports 230.4 Kbps,  so you will configure the baud rate on this module as well.  Below is a Series B module.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"640\" height=\"480\" data-src=\"https:\/\/bryceautomation.com\/wp-content\/uploads\/2020\/08\/dhriosticker-rotated.jpg\" alt=\"\" class=\"wp-image-2824 lazyload\" data-srcset=\"https:\/\/bryceautomation.com\/wp-content\/uploads\/2020\/08\/dhriosticker-rotated.jpg 640w, https:\/\/bryceautomation.com\/wp-content\/uploads\/2020\/08\/dhriosticker-300x225.jpg 300w\" data-sizes=\"(max-width: 640px) 100vw, 640px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 640px; --smush-placeholder-aspect-ratio: 640\/480;\" \/><\/figure>\n\n\n\n<p>Obviously, by looking at the sticker on the side of the module, you will know how to set the configuration dials on the top of the module.  In this case, Channel A is in DH+ mode.  Conversely, Channel B is in Remote I\/O mode.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"640\" height=\"480\" data-src=\"https:\/\/bryceautomation.com\/wp-content\/uploads\/2020\/08\/dhrioselect.jpg\" alt=\"\" class=\"wp-image-2825 lazyload\" data-srcset=\"https:\/\/bryceautomation.com\/wp-content\/uploads\/2020\/08\/dhrioselect.jpg 640w, https:\/\/bryceautomation.com\/wp-content\/uploads\/2020\/08\/dhrioselect-300x225.jpg 300w\" data-sizes=\"(max-width: 640px) 100vw, 640px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 640px; --smush-placeholder-aspect-ratio: 640\/480;\" \/><\/figure>\n\n\n\n<p>For channels in DH+ mode, you must also set the node address (0 to 77 octal).   Look at the opposite end of the module.   In this case, the node address is 03.  (The first 2 dials are for channel A).   The last two dials are for channel B, but only if the channel is in DH+ Mode.   This setting of &#8220;02&#8221; for channel B is ignored in this case, because the channel is configured for Remote I\/O.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"640\" height=\"480\" data-src=\"https:\/\/bryceautomation.com\/wp-content\/uploads\/2020\/08\/dhrionodes-1.jpg\" alt=\"\" class=\"wp-image-2827 lazyload\" data-srcset=\"https:\/\/bryceautomation.com\/wp-content\/uploads\/2020\/08\/dhrionodes-1.jpg 640w, https:\/\/bryceautomation.com\/wp-content\/uploads\/2020\/08\/dhrionodes-1-300x225.jpg 300w\" data-sizes=\"(max-width: 640px) 100vw, 640px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 640px; --smush-placeholder-aspect-ratio: 640\/480;\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Troubleshooting<\/h3>\n\n\n\n<p>When troubleshooting the status lights on the ControlLogix 1756-DHRIO module, we need to know which mode each channel is in.  The alphanumeric display tells you the mode of each channel if the module is powered up. <\/p>\n\n\n\n<p>For a channel in DH+ Mode, Solid green indicates that the module is communicating on the network.   On the other hand, a flashing green light indicates the module is not seeing other nodes.   Flashing Red indicates a duplicate node on the network, whereas solid red indicates a hardware fault.    <\/p>\n\n\n\n<p>For remote I\/O channels:   Solid green indicates the channel is healthy.   A flashing green indicates shows that at least one device is not communicating.   Flashing red indicates that you have lost communication to all devices on the remote I\/O network.   Solid red would be a hardware failure.<\/p>\n\n\n\n<p>Overall, be careful how much traffic you place on these networks.   Due to the bandwidth limitation, too much traffic can render the network unusable.<\/p>\n\n\n\n<p>For more information on ControlLogix, visit the <a href=\"https:\/\/bryceautomation.com\/index.php\/category\/controllogix\/\">category page.<\/a><\/p>\n\n\n\n<p>&#8212; Ricky Bryce<\/p>\n<div id=\"bryce-2634261021\" class=\"bryce-after-content bryce-entity-placement\"><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-8316758073402323\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-8316758073402323\" \ndata-ad-slot=\"4667596182\" \ndata-ad-format=\"auto\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Introduction to the ControlLogix 1756-DHRIO Module The ControlLogix 1756-DHRIO module allows you to interface with the older Data Highway Plus (DH+) Network. You can also connect to a maximum of four Remote I\/O Racks per channel. Each 1756-DHRIO module has 2 ports. Each of which will support DH+ or Remote I\/O protocol. Network Setup Whenever <a class=\"moretag btn btn-primary\" href=\"https:\/\/bryceautomation.com\/index.php\/2020\/08\/23\/controllogix-1756-dhrio-module\/\">Read More \u00bb<\/a><\/p>\n","protected":false},"author":1,"featured_media":2823,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[219,172,220,12],"class_list":{"0":"post-2822","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-controllogix","8":"tag-date-highway-plus","9":"tag-dh","10":"tag-dhrio","11":"tag-remote-io","12":"czr-hentry"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ControlLogix 1756-DHRIO Module - Bryce Automation<\/title>\n<meta name=\"description\" content=\"Setup, specifications, and troubleshooting the ControlLogix 1756-DHRIO Module. 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