{"id":905,"date":"2019-03-25T17:32:47","date_gmt":"2019-03-25T20:32:47","guid":{"rendered":"http:\/\/xexeu.elipse.com.br\/pt\/kb30910-algoritmo-de-leitura-das-tags-de-comunicacao\/"},"modified":"2019-03-25T17:32:47","modified_gmt":"2019-03-25T20:32:47","slug":"kb30910-algoritmo-de-leitura-das-tags-de-comunicacao","status":"publish","type":"post","link":"https:\/\/kb.elipse.com.br\/en\/kb30910-algoritmo-de-leitura-das-tags-de-comunicacao\/","title":{"rendered":"KB-30910: Algoritmo de leitura das tags de comunica\u00e7\u00e3o."},"content":{"rendered":"

Descri\u00e7\u00e3o:<\/strong><\/p>\n

\n<\/div>\n

Como funciona a l\u00f3gica de varredura das tags de comunica\u00e7\u00e3o dos Drivers da Elipse<\/span> Software<\/b>?<\/p>\n

\n<\/div>\n

Solu\u00e7\u00e3o:<\/strong><\/p>\n

\n<\/div>\n

O driver faz uma “varredura” na lista de tags de comunica\u00e7\u00e3o. O primeiro tag a ser lido ser\u00e1 o que estiver no topo da lista, e s\u00f3 ser\u00e1 lido novamente ap\u00f3s todos os demais tags terem sido lidos.<\/p>\n

Para cada tag, o driver verifica se: <\/p>\n

    \n
  • a propriedade AllowRead <\/i>est\u00e1 em True.<\/li>\n
  • o tag est\u00e1 em Advise <\/span>(associado a algum objeto do E3 que precise do valor do tag).<\/li>\n
  • o tempo atual \u00e9 superior ao tempo de scan mais o tempo da \u00faltima leitura.<\/li>\n<\/ul>\n

    Exemplo<\/span>:<\/p>\n

    Considere os seguintes tags de comunica\u00e7\u00e3o:<\/p>\n

    \n\n\n\n\n\n\n
     Nome<\/td>\nVarredura (em milissegundos)<\/td>\nLeitura <\/td>\n<\/tr>\n
     Tag1<\/td>\n 1000<\/td>\n SIM<\/td>\n<\/tr>\n
     Tag2<\/td>\n 1000<\/td>\n N\u00c3O<\/td>\n<\/tr>\n
     Tag3<\/td>\n 3000<\/td>\n SIM<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    1. Quando a comunica\u00e7\u00e3o \u00e9 iniciada, todos os tags com leitura habilitada (AllowRead<\/i>=True) e em Advise <\/b>ser\u00e3o lidos.<\/p>\n

    2. Se o driver, por motivos f\u00edsicos, demorar 2 segundos para ler toda a lista de tags, a seguinte varredura de atualiza\u00e7\u00e3o das tags ser\u00e1 feita:<\/p>\n

    Tag1 <\/b>– Precisa ser a atualizado a cada 1s, j\u00e1 se passaram 2 segundos. Ser\u00e1 lido.
    Tag2 <\/b>– Leitura desabilitada
    Tag3 <\/b>– Precisa ser a atualizado a cada 3s, s\u00f3 se passaram 2 segundos. N\u00e3o ser\u00e1 lido.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Descri\u00e7\u00e3o: Como funciona a l\u00f3gica de varredura das tags de comunica\u00e7\u00e3o dos Drivers da Elipse Software? Solu\u00e7\u00e3o: O driver faz uma “varredura” na lista de tags de comunica\u00e7\u00e3o. O primeiro…<\/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":[601],"tags":[],"yoast_head":"\nKB-30910: Algoritmo de leitura das tags de comunica\u00e7\u00e3o. - 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\/kb30910-algoritmo-de-leitura-das-tags-de-comunicacao\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"KB-30910: Algoritmo de leitura das tags de comunica\u00e7\u00e3o.\" \/>\n<meta property=\"og:description\" content=\"Descri\u00e7\u00e3o: Como funciona a l\u00f3gica de varredura das tags de comunica\u00e7\u00e3o dos Drivers da Elipse Software? 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