eWON General Reference Guide - Esco Drives & Automation

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General Reference GuideExport Block Descriptors8.3 Data Types description and syntaxA Data type defines what is exported from the eWON. The data type is defined by the $dt field followed by 2 uppercase letters. The $dt field ismandatory for each "Export Block Descriptor" and usually the $ft (Format) field will also be present to define the output format of your data(although a default format is defined for each data type).For each Data type, a set of other fields must be provided (some are mandatory and others are optional).Note:If you specify an unused field (neither mandatory nor optional), it will then be ignored.This section will describe the syntax for each data type with the specific features for each of them.8.3.1 $dtHL [Historical Logging]8.3.1.1 Export contentThe Historical logging outputs the data from the File system for ONE or ALL the fields. The output format can be TEXT, HTML Table or BINARY.The GRAPH format is also available IF only ONE Tag is specified.A time range can also be specified for this export.8.3.1.2 Detailed Example$dtHL $ftT $st_h4 $et_m0 $tnA1$dtHL$ftT$st_h4$et_0$tnA1data type historical loggingoutput format requested is CSVstart time is current time – 4 hoursend time is current time – 0 minutes NOWTag history to outputTable 142: $dtHL detailed example8.3.1.3 Used FieldsFieldsValue if not specifiedMandatory$dtOptional$ftBinary$st 01/01/1970$et 31/12/2030$tn$ut$fn$ctAllNo time updateExport block descriptorCompression typeTable 143: $dt - used fields8.3.1.4 Special parameters and fields$st $etIf Last time is specified: ($stL or $etL): there is a last time logged for each Tag plus a last time logged for all Tags. If you specify a given Tag, itsown last time will be used. If a specific Tag is not requested, the export is performed for Tags concerned by historical logging and another lasttime memory is used.If the output format is graph: $et_0 should be used instead of default value, otherwise the graph would span up to 31/12/2030. For binary or textoutput, the default value can be kept.RG-001-0-EN ver 1.5 eWON® - 20/03/2009 - ©ACT'L sa Page 171
General Reference GuideExport Block Descriptors$ftAcceptable valuesBinary Text HTML GraphTable 144: [$dtHL] $ft acceptable valuesThe Graph format is only allowed if a Tag has been specified.The Text format will output a comma-separated file. The separator is ‘;’ to avoid any confusion with decimal point. If all the Tags are output theywill be output in a chronological order in the file.$utIf only one Tag is specified, the time of the last point for that Tag will be memorized. All the Tags can be output individually and last time is savedfor each point. Another memory is available if $ut is requested for ALL the Tags.$tnIf this Tag is not specified, ALL the Tags will be selected for export. Otherwise, the Tag with the given name will be selected.RG-001-0-EN ver 1.5 eWON® - 20/03/2009 - ©ACT'L sa Page 172
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General Reference GuideeWON Configu
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