{"id":1222,"date":"2018-08-06T15:44:23","date_gmt":"2018-08-06T08:44:23","guid":{"rendered":"https:\/\/simenteknindo.com\/news\/?p=1222"},"modified":"2023-04-03T10:20:05","modified_gmt":"2023-04-03T03:20:05","slug":"reset-a-simatic-s7-300-cpu-and-mmc","status":"publish","type":"post","link":"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/","title":{"rendered":"Reset a SIMATIC S7-300 CPU and MMC"},"content":{"rendered":"<p>How do you reset a SIMATIC S7-300 CPU and MMC (default reset or overall reset)? describes how to reset a SIMATIC MMC for the S7-300.<\/p>\n<p><strong>Description<br \/>\n<\/strong> With S7-300 CPUs, the communication data of the local interface (protocol, baud rate and station address) is retained if no MMC or an MMC with invalid data<sup>*<\/sup> is slotted at startup. The CPU can still be reached via the previous communication data.<br \/>\nThe communication data is changed only in the case of a default reset or when starting up with an MMC with valid data<sup>*<\/sup>.<\/p>\n<p><strong>S7-300 CPU<\/strong><br \/>\nWith S7-300 CPUs (except CPU 318), the function &#8220;Reset in the as-delivered status&#8221; is implemented as of firmware version V2.5.<br \/>\nIn the chapter entitled Reset in the as-delivered status of the operating instructions &#8220;S7-300 CPU 31xC and CPU 31x: Setting up&#8221; you will find all the information on the effect of and procedure for &#8220;Resetting in the as-delivered status&#8221;.<\/p>\n<p><strong>MMC<br \/>\n<\/strong>It is only possible to reset the MMC if it contains data<sup>*<\/sup> that is invalid for the CPU. Otherwise the MMC is only initialized by the procedure described.<\/p>\n<p>All the user data is deleted when you reset the SIMATIC Micro Memory Card (MMC). Proceed as follows.<\/p>\n<ol>\n<li>The MMC is slotted in the bay of the CPU. The CPU requests an overall reset (slow blinking of the STOP LED).<\/li>\n<li>Set the switch to &#8220;MRES&#8221; and hold it there until the STOP LED lights continuously (approx. 9 seconds).<\/li>\n<li>Within the next 3 seconds, you must let the switch go and set it again to &#8220;MRES&#8221;. The STOP LED now blinks during the delete procedure.<\/li>\n<\/ol>\n<p>If the CPU continues to request an overall reset after the procedure described above, then the MMC is defective.<\/p>\n<p><strong>Note on firmware V3.2 and V3.3<\/strong><br \/>\nWith these firmware versions you cannot reset the MMC with the CPU. In this case you need either a Field PG or a USB prommer to reset the MMC.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>How do you reset a SIMATIC S7-300 CPU and MMC [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1225,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"image","meta":{"footnotes":""},"categories":[7,8,12],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Reset a SIMATIC S7-300 CPU and MMC - SIMENTEK News<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Reset a SIMATIC S7-300 CPU and MMC - SIMENTEK News\" \/>\n<meta property=\"og:description\" content=\"How do you reset a SIMATIC S7-300 CPU and MMC [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/\" \/>\n<meta property=\"og:site_name\" content=\"SIMENTEK News\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/PtSimenteknindo\/\" \/>\n<meta property=\"article:published_time\" content=\"2018-08-06T08:44:23+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-04-03T03:20:05+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2018\/08\/s7-300_header.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"638\" \/>\n\t<meta property=\"og:image:height\" content=\"393\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Wimpy\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@simenteknindo\" \/>\n<meta name=\"twitter:site\" content=\"@simenteknindo\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Wimpy\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/\"},\"author\":{\"name\":\"Wimpy\",\"@id\":\"https:\/\/simenteknindo.com\/news\/#\/schema\/person\/524d37c7e448b5855c7499cd6356fa3e\"},\"headline\":\"Reset a SIMATIC S7-300 CPU and MMC\",\"datePublished\":\"2018-08-06T08:44:23+00:00\",\"dateModified\":\"2023-04-03T03:20:05+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/\"},\"wordCount\":330,\"publisher\":{\"@id\":\"https:\/\/simenteknindo.com\/news\/#organization\"},\"image\":{\"@id\":\"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2018\/08\/s7-300_header.jpg\",\"articleSection\":[\"PLC Programming\",\"Reviews Products\",\"Troubleshooting\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/\",\"url\":\"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/\",\"name\":\"Reset a SIMATIC S7-300 CPU and MMC - SIMENTEK News\",\"isPartOf\":{\"@id\":\"https:\/\/simenteknindo.com\/news\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2018\/08\/s7-300_header.jpg\",\"datePublished\":\"2018-08-06T08:44:23+00:00\",\"dateModified\":\"2023-04-03T03:20:05+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/#primaryimage\",\"url\":\"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2018\/08\/s7-300_header.jpg\",\"contentUrl\":\"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2018\/08\/s7-300_header.jpg\",\"width\":638,\"height\":393},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/simenteknindo.com\/news\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Reset a SIMATIC S7-300 CPU and MMC\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/simenteknindo.com\/news\/#website\",\"url\":\"https:\/\/simenteknindo.com\/news\/\",\"name\":\"SIMENTEK News\",\"description\":\"Distributor SIEMENS Indonesia\",\"publisher\":{\"@id\":\"https:\/\/simenteknindo.com\/news\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/simenteknindo.com\/news\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/simenteknindo.com\/news\/#organization\",\"name\":\"PT. SIMENTEKNINDO\",\"url\":\"https:\/\/simenteknindo.com\/news\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/simenteknindo.com\/news\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2016\/06\/simentek-logo.png\",\"contentUrl\":\"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2016\/06\/simentek-logo.png\",\"width\":400,\"height\":400,\"caption\":\"PT. SIMENTEKNINDO\"},\"image\":{\"@id\":\"https:\/\/simenteknindo.com\/news\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/PtSimenteknindo\/\",\"https:\/\/x.com\/simenteknindo\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/simenteknindo.com\/news\/#\/schema\/person\/524d37c7e448b5855c7499cd6356fa3e\",\"name\":\"Wimpy\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/simenteknindo.com\/news\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2020\/07\/wimpy-96x96.jpg\",\"contentUrl\":\"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2020\/07\/wimpy-96x96.jpg\",\"caption\":\"Wimpy\"},\"description\":\"www.linkedin.com\/in\/wimpynf\",\"sameAs\":[\"www.linkedin.com\/in\/wimpynf\"],\"url\":\"https:\/\/simenteknindo.com\/news\/author\/wnf\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Reset a SIMATIC S7-300 CPU and MMC - SIMENTEK News","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/","og_locale":"en_US","og_type":"article","og_title":"Reset a SIMATIC S7-300 CPU and MMC - SIMENTEK News","og_description":"How do you reset a SIMATIC S7-300 CPU and MMC [&hellip;]","og_url":"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/","og_site_name":"SIMENTEK News","article_publisher":"https:\/\/www.facebook.com\/PtSimenteknindo\/","article_published_time":"2018-08-06T08:44:23+00:00","article_modified_time":"2023-04-03T03:20:05+00:00","og_image":[{"width":638,"height":393,"url":"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2018\/08\/s7-300_header.jpg","type":"image\/jpeg"}],"author":"Wimpy","twitter_card":"summary_large_image","twitter_creator":"@simenteknindo","twitter_site":"@simenteknindo","twitter_misc":{"Written by":"Wimpy","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/#article","isPartOf":{"@id":"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/"},"author":{"name":"Wimpy","@id":"https:\/\/simenteknindo.com\/news\/#\/schema\/person\/524d37c7e448b5855c7499cd6356fa3e"},"headline":"Reset a SIMATIC S7-300 CPU and MMC","datePublished":"2018-08-06T08:44:23+00:00","dateModified":"2023-04-03T03:20:05+00:00","mainEntityOfPage":{"@id":"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/"},"wordCount":330,"publisher":{"@id":"https:\/\/simenteknindo.com\/news\/#organization"},"image":{"@id":"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/#primaryimage"},"thumbnailUrl":"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2018\/08\/s7-300_header.jpg","articleSection":["PLC Programming","Reviews Products","Troubleshooting"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/","url":"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/","name":"Reset a SIMATIC S7-300 CPU and MMC - SIMENTEK News","isPartOf":{"@id":"https:\/\/simenteknindo.com\/news\/#website"},"primaryImageOfPage":{"@id":"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/#primaryimage"},"image":{"@id":"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/#primaryimage"},"thumbnailUrl":"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2018\/08\/s7-300_header.jpg","datePublished":"2018-08-06T08:44:23+00:00","dateModified":"2023-04-03T03:20:05+00:00","breadcrumb":{"@id":"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/#primaryimage","url":"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2018\/08\/s7-300_header.jpg","contentUrl":"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2018\/08\/s7-300_header.jpg","width":638,"height":393},{"@type":"BreadcrumbList","@id":"https:\/\/simenteknindo.com\/news\/reset-a-simatic-s7-300-cpu-and-mmc\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/simenteknindo.com\/news\/"},{"@type":"ListItem","position":2,"name":"Reset a SIMATIC S7-300 CPU and MMC"}]},{"@type":"WebSite","@id":"https:\/\/simenteknindo.com\/news\/#website","url":"https:\/\/simenteknindo.com\/news\/","name":"SIMENTEK News","description":"Distributor SIEMENS Indonesia","publisher":{"@id":"https:\/\/simenteknindo.com\/news\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/simenteknindo.com\/news\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/simenteknindo.com\/news\/#organization","name":"PT. SIMENTEKNINDO","url":"https:\/\/simenteknindo.com\/news\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/simenteknindo.com\/news\/#\/schema\/logo\/image\/","url":"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2016\/06\/simentek-logo.png","contentUrl":"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2016\/06\/simentek-logo.png","width":400,"height":400,"caption":"PT. SIMENTEKNINDO"},"image":{"@id":"https:\/\/simenteknindo.com\/news\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/PtSimenteknindo\/","https:\/\/x.com\/simenteknindo"]},{"@type":"Person","@id":"https:\/\/simenteknindo.com\/news\/#\/schema\/person\/524d37c7e448b5855c7499cd6356fa3e","name":"Wimpy","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/simenteknindo.com\/news\/#\/schema\/person\/image\/","url":"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2020\/07\/wimpy-96x96.jpg","contentUrl":"https:\/\/simenteknindo.com\/news\/wp-content\/uploads\/2020\/07\/wimpy-96x96.jpg","caption":"Wimpy"},"description":"www.linkedin.com\/in\/wimpynf","sameAs":["www.linkedin.com\/in\/wimpynf"],"url":"https:\/\/simenteknindo.com\/news\/author\/wnf\/"}]}},"_links":{"self":[{"href":"https:\/\/simenteknindo.com\/news\/wp-json\/wp\/v2\/posts\/1222"}],"collection":[{"href":"https:\/\/simenteknindo.com\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/simenteknindo.com\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/simenteknindo.com\/news\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/simenteknindo.com\/news\/wp-json\/wp\/v2\/comments?post=1222"}],"version-history":[{"count":8,"href":"https:\/\/simenteknindo.com\/news\/wp-json\/wp\/v2\/posts\/1222\/revisions"}],"predecessor-version":[{"id":1977,"href":"https:\/\/simenteknindo.com\/news\/wp-json\/wp\/v2\/posts\/1222\/revisions\/1977"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/simenteknindo.com\/news\/wp-json\/wp\/v2\/media\/1225"}],"wp:attachment":[{"href":"https:\/\/simenteknindo.com\/news\/wp-json\/wp\/v2\/media?parent=1222"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/simenteknindo.com\/news\/wp-json\/wp\/v2\/categories?post=1222"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/simenteknindo.com\/news\/wp-json\/wp\/v2\/tags?post=1222"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}