When reading processed historical data from OPC UA server, if you don’t set processing interval, only one value will be returned.<\/p>\n\n\n\n
So if you use aggregation function Max from StartTime to EndTime, if you don’t specify the processing interval, it will return the maximum value from start time to end time.<\/p>\n\n\n\n
If you specify the processing interval to 1 hour, it will return multiple max values for each hour within StartTime to EndTime.<\/p>\n","protected":false},"excerpt":{"rendered":"
When reading processed historical data from OPC UA server, if you don’t set processing interval, only one value will be returned. So if you use aggregation function Max from StartTime to EndTime, if you don’t specify the processing interval, it will return the maximum value from start time to end time. If you specify the … Continue reading “Read single aggregate historical values from OPC UA”<\/span><\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,14],"tags":[102],"class_list":["post-715","post","type-post","status-publish","format-standard","hentry","category-problems","category-tips-and-tricks","tag-opc-ua"],"_links":{"self":[{"href":"https:\/\/bruceng.com\/dev\/index.php?rest_route=\/wp\/v2\/posts\/715","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bruceng.com\/dev\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bruceng.com\/dev\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bruceng.com\/dev\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/bruceng.com\/dev\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=715"}],"version-history":[{"count":1,"href":"https:\/\/bruceng.com\/dev\/index.php?rest_route=\/wp\/v2\/posts\/715\/revisions"}],"predecessor-version":[{"id":716,"href":"https:\/\/bruceng.com\/dev\/index.php?rest_route=\/wp\/v2\/posts\/715\/revisions\/716"}],"wp:attachment":[{"href":"https:\/\/bruceng.com\/dev\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=715"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bruceng.com\/dev\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=715"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bruceng.com\/dev\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=715"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}