eWON General Reference Guide - Esco Drives & Automation

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General Reference GuideExport Block Descriptors8 Export Block DescriptorExports are used to export eWON data.Export block can be used in the following situations:• Attach the eWON data to an email• Include eWON data into an eMail content• Make an FTP PUT of eWON data from the eWON to a FTP server• Make an FTP GET from a FTP client out of the eWON FTP server• Include data in an eWON HTML custom page.• Access data in Basic with OPEN “exp:.....”In all these cases, an Export Block Descriptor will be used to describe the data to export.8.1 Export block descriptorAn Export Block Descriptor is a string of characters describing the eWON data to export with a precise syntax.Typically, the Export Block Descriptor will answer the following questions:• What eWON data to export (Event log, Historical logging, etc.)?• How to format the data to export (Binary, Text, Html table, Graphic)?• From what time?• To what time?• What Tag is concerned?• …?This list is NOT complete, and this information is not required for each type of data to export, but it gives an idea of what is described in an Exportblock descriptor.Example of Export blocks descriptor:$dtHL $ftT $st_m10 $et_0 $tnMyTag $fnData.csvThe export syntax is composed of a sequence of fields followed by its value. A field is a 3 characters identifier starting with $ and followed by 2lower cap letters (case sensitive).• The first letter of the parameter value follows immediately the second letter of the field.• The parameter is considered up to the first space found or until a $ or a [ is detected.• The parameter can also be placed between quotes ("). In that case the parameter value is the value between the quotes.The following fields are defined:Fields$dt$ft$st$et$tn$ut$ct$fl$fnDescriptionData typeExport formatStart timeEnd timeTag nameUpdate last timeCompression typeGroup filterFile nameTable 136: Export Block Descriptor fields descriptionRG-001-0-EN ver 1.5 eWON® - 20/03/2009 - ©ACT'L sa Page 167
General Reference GuideExport Block Descriptors8.2 Export fields syntax definitionThe syntax for the different fields is defined in the following chapters.8.2.1 $dt [Data Type]The $dt field defines what data to export from the eWON. The $dt parameter is made up of 2 upper case letters (case sensitive) that can take oneof the following values:$dt Parameter Description Binary Graph Text HtmlAH Alarm history T* HAR Alarm Real time T* HCF Config B*ES estat file T HEV Event file T* HFW Firmware B*HL Historical Logging B* G T HHT Historical Table T* HIV Instant values B* TPG Program T*PP PPP dump file BRL Real time logging B* G T HSC Communications configuration file T HSE Script Expression B* T HSS Scheduled status T* HSV System Variable TTL Tag list T* HUF User file B* T HRE Real Time diagnostic T*TR TAR File B*Table 137: $dt parameters description(*) The asterisk in the previous table denotes the default value of the $ft (export format). For example, for the DataType HL (Historical Logging),the default export format will be B (Binary) if you do not specify a $ft in your Export Bloc Descriptor (using [$dtHL] is equivalent to [$dtHL $ftB]).8.2.2 $ft [Format]The $ft field defines how to format the data exported. The following formats are available:$ft ParameterBGTHFormat descriptionBinaryGraphTextHTML TableTable 138: $ft parameters description• Binary: the data are sent in a raw binary format, not modified by the export module.• Graph: the data are used to produce a PNG (Portable Network Graphic) image representing a graph of the values (historical trend orreal time graph).• Text: The data are formatted as a CSV file, this means that each record is represented with each field on a line separated by asemicolon (;). The string fields are written between quotes, each line is ending by a CRLF (0x0D, 0x0A) sequence.• Html: Instead of the text format, the data are placed in a simple HTML table. This format is useful for inserting data in the user customHTML pages.RG-001-0-EN ver 1.5 eWON® - 20/03/2009 - ©ACT'L sa Page 168
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