{"id":2779,"date":"2019-03-25T17:41:11","date_gmt":"2019-03-25T20:41:11","guid":{"rendered":"http:\/\/xexeu.elipse.com.br\/pt\/using-modbus-master-ascrtutcp-drivers-with-atoss-controllers\/"},"modified":"2019-06-10T14:22:25","modified_gmt":"2019-06-10T17:22:25","slug":"using-modbus-master-ascrtutcp-drivers-with-atoss-controllers","status":"publish","type":"post","link":"https:\/\/kb.elipse.com.br\/en\/using-modbus-master-ascrtutcp-drivers-with-atoss-controllers\/","title":{"rendered":"Using Modbus Master (ASC\/RTU\/TCP) drivers with ATOS’s controllers."},"content":{"rendered":"
\n

1) Introduction<\/span><\/p>\n

In addition to communicating with APR03 <\/span>protocol, ATOS’s controllers can also establish communication with Modbus protocol (which can be set at ATOS’s programming tool) on RTU mode via RS-485 network.<\/p>\n

However, to be able to connect with ATOS’s controllers via Elipse’s Modbus Master driver, some specific settings are required. These settings are described in this article.<\/p>\n


2) Frames’s size limits for Modbus protocol <\/span><\/p>\n

Modbus protocol sets a simple data unit called PDU (Protocol Data Unit), which remains unchanged in the protocol’s several modes and communication layers.<\/p>\n

The full communication frame, including PDU and other additional header fields, is called ADU (Application Data Unit).<\/p>\n

A complete Modbus frame (ADU) can have a PDU that is no larger than 253 bytes.<\/p>\n

\"\"<\/div>\n

3) ATOS’s Modbus Protocol<\/span><\/p>\n

ATOS’s controllers implement a default Modbus protocol, with little variation.<\/p>\n

In newer controllers, using A1 <\/span>configuration protocol, the only difference from the default Modbus protocol is regarding their sizes.<\/p>\n

Older controllers, using WinSUP<\/span>, also have another difference: registers are addressed byte by byte, and superblocks (EnableReadGrouping<\/span>) cannot be used.<\/p>\n

All limits accepted by ATOS’s PLCs, as well as a detailed view of the protocol, are found at PR3 – 01\/2001<\/span> technical newsletter, which can be downloaded from ATOS’s website. A thorough read of this document is highly recommended.<\/p>\n


4) Byte order<\/span><\/p>\n

Modbus protocol sets how bytes sent to the PDU’s data area must be sorted out, where each Word’s most significant byte must appear first in each register.<\/p>\n

ATOS’s older controllers, which use WinSUP <\/span>software, sort their bytes according to the protocol’s specifications. 32-bit types, however, are not defined by the protocol, and use the reverse sorting order for its Words; this order demands the driver’s Swap Word<\/span> option to be enabled.<\/p>\n

More recent controllers, using A1 <\/span>software, allow you to configure their byte order. To use the protocol’s default, choose Motorola <\/span>option on the PLC’s settings.<\/p>\n

5) Final remarks <\/span><\/p>\n

The table below summarizes the settings discussed in this article:<\/p>\n\n\n\n\n\n
\u00a0Contoller type<\/td>\n\u00a0Recommended settings<\/td>\n<\/tr>\n
\u00a0PLC with Blackfin processor (using A1<\/span> programming tool)<\/td>\n\n
    \n
  • If bit read\/write is not used: customize the PCU’s maximum limit as 60 bytes<\/span><\/li>\n
  • If bit read\/write is used: turn off superblocks (EnableGroupReading <\/span>= FALSE<\/span>), and group tags into blocks manually, according to the limits supported in ATOS’s Modbus (see PR3 01\/2001 technical newsletter at ATOS’s website)<\/li>\n
  • Set the PLC’s byte order to Motorola <\/span>standard. If another standard is necessary, change the driver’s sorting settings(swap options)<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
\u00a0Controller using other processors (with WinSUP <\/span>software)<\/td>\n\n
    \n
  • If bit read\/write is not used: customize the PCU’s maximum limit as 60 bytes<\/span><\/li>\n
  • Turn off superblocks (EnableGroupReading <\/span>= FALSE<\/span>), and group tags into blocks manually, according to the limits supported in ATOS’s Modbus (see PR3 01\/2001 technical newsletter at ATOS’s website)<\/li>\n
  • All driver’s operations with 32-bit data<\/span> must have their Swap Word<\/span> option enabled<\/span>. The other operations must keep all resorting\/swap options disabled<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    If you need to group the tags into blocks manually, thus turning off superblocks option, use the table below to determine the maximum amount of elements per block, depending on the Modbus function being used.<\/p>\n\n\n\n\n\n\n
    \u00a0Modbus’s read function<\/td>\n\u00a0Datatype size<\/td>\n\u00a0Maximum number of elements<\/td>\n<\/tr>\n
    \u00a03 or 4<\/td>\n\u00a016 bits<\/td>\n\u00a030<\/td>\n<\/tr>\n
    \u00a03 or 4<\/td>\n\u00a032 bits<\/td>\n\u00a015<\/td>\n<\/tr>\n
    \u00a01,2<\/td>\n\u00a01 bit<\/td>\n\u00a064<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    The table above presents only Modbus’s read functions, since write functions are usually performed in individual elements, and not in block. Modbus’s write functions have a smaller register limit.<\/p>\n

    If you occasionally need to write whole blocks, the limits are the following:<\/p>\n\n\n\n\n\n\n
    \u00a0Modbus’s write functions<\/td>\n\u00a0Datatype size<\/td>\n\u00a0Maximum number of elements<\/td>\n<\/tr>\n
    \u00a016<\/td>\n\u00a016 bits<\/td>\n\u00a027<\/td>\n<\/tr>\n
    \u00a016<\/td>\n\u00a032 bits<\/td>\n\u00a013<\/td>\n<\/tr>\n
    \u00a015<\/td>\n\u00a01 bit<\/td>\n\u00a064<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

     <\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

    1) Introduction In addition to communicating with APR03 protocol, ATOS’s controllers can also establish communication with Modbus protocol (which can be set at ATOS’s programming tool) on RTU mode via…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0},"categories":[792],"tags":[],"yoast_head":"\nUsing Modbus Master (ASC\/RTU\/TCP) drivers with ATOS's controllers. - Elipse Knowledgebase<\/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:\/\/kb.elipse.com.br\/en\/using-modbus-master-ascrtutcp-drivers-with-atoss-controllers\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Using Modbus Master (ASC\/RTU\/TCP) drivers with ATOS's controllers.\" \/>\n<meta property=\"og:description\" content=\"1) Introduction In addition to communicating with APR03 protocol, ATOS’s controllers can also establish communication with Modbus protocol (which can be set at ATOS’s programming tool) on RTU mode via…\" \/>\n<meta property=\"og:url\" content=\"https:\/\/kb.elipse.com.br\/en\/using-modbus-master-ascrtutcp-drivers-with-atoss-controllers\/\" \/>\n<meta property=\"og:site_name\" content=\"Elipse Knowledgebase\" \/>\n<meta property=\"article:publisher\" content=\"http:\/\/www.facebook.com\/elipsesoftware\" \/>\n<meta property=\"article:published_time\" content=\"2019-03-25T20:41:11+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-06-10T17:22:25+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/kb.elipse.com.br\/pt-br\/images\/ID4441\/PDU_US.png\" \/>\n<meta name=\"author\" content=\"Elipse Software\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Elipse Software\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/kb.elipse.com.br\/en\/using-modbus-master-ascrtutcp-drivers-with-atoss-controllers\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/kb.elipse.com.br\/en\/using-modbus-master-ascrtutcp-drivers-with-atoss-controllers\/\"},\"author\":{\"name\":\"Elipse Software\",\"@id\":\"https:\/\/kb.elipse.com.br\/#\/schema\/person\/def69ea453ea60b250497b89225a9f87\"},\"headline\":\"Using Modbus Master (ASC\/RTU\/TCP) drivers with ATOS’s controllers.\",\"datePublished\":\"2019-03-25T20:41:11+00:00\",\"dateModified\":\"2019-06-10T17:22:25+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/kb.elipse.com.br\/en\/using-modbus-master-ascrtutcp-drivers-with-atoss-controllers\/\"},\"wordCount\":582,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/kb.elipse.com.br\/#organization\"},\"articleSection\":[\"Modicon Modbus Master (ASC\/RTU\/TCP)\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/kb.elipse.com.br\/en\/using-modbus-master-ascrtutcp-drivers-with-atoss-controllers\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/kb.elipse.com.br\/en\/using-modbus-master-ascrtutcp-drivers-with-atoss-controllers\/\",\"url\":\"https:\/\/kb.elipse.com.br\/en\/using-modbus-master-ascrtutcp-drivers-with-atoss-controllers\/\",\"name\":\"[:pt]Using Modbus Master (ASC\/RTU\/TCP) drivers with ATOS's controllers.[:] - 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