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API

Mervis SCADA nabízí otevřené REST-like API postavené na JSON a XML formátech dat. Pro kompletní popis API kontaktujte naši technickou podporu.

Přehled základních API metod

FunctionDescription
api/checkCredentials
api/logout
api/get/projects
api/get/projectData
api/get/projectByParts
api/get/history
api/get/history/specific
api/set/history
api/get/values
api/get/alarms
api/get/alarmHistory
api/get/eventHistory
api/get/changes
api/set/executeActions
api/set/values
api/set/executeAlarmOps
api/set/projectPriorityRefresh
api/get/schema
api/get/schema/datapoints
api/get/schema/values
api/get/schema/image

Příklad

api/checkCredentials

Request

Request 

{"cred":{"n":"demo","p":"demo"}}

Response 

<?xml version="1.0" encoding="utf-8"?>
<checkCredentialsResult xmlns:r="http://dev.rcware.eu/serialization/references" d="GlobalDomain" l="demo" t="2:85be00d3-5875-4dec-a9b4-c98e2ff2acbe" xmlns="http://dev.rcware.eu/auth" />
  • Získaný token t lze použít místo dvojice jméno/heslo v následujících API voláních.

api/get/history

Request

  • URL: /api/get/history?format=xml
  • Method: POST
{  
   "cred":{  
      "n":"demo",
      "p":"demo",
      "pe":0
   },
   "projId":"5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0",
   "dpId":"62cf4083-31ed-4bc1-be25-044ba837a9f0",
   "from":"/Date(1541199600000)/",
   "to":"/Date(1541496190357)/",
   "offset":0,
   "count":5000,
   "historyState":""
}

Response 

<?xml version="1.0" encoding="utf-8"?>
<getHistoryResult xmlns:r="http://dev.rcware.eu/serialization/references" r:type="b133774d-21ce-42b6-add3-57c012079c55" xmlns:n1="http://dev.rcware.eu/scada/basic-props" xmlns="http://dev.rcware.eu/scada/history">
  <hist projId="5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0" dpId="62cf4083-31ed-4bc1-be25-044ba837a9f0" propName="Output" interval="PT3M" historyState="" nextValOfs="-1">
    <errMsg/>
    <vals>
      <hv ts="2018-11-02T21:26:08.7936747Z" gt="2018-11-03T20:35:08.8060769Z">
        <n1:v>12754</n1:v>
      </hv>
      <hv ts="2018-11-03T20:41:09.0100479Z" gt="2018-11-05T11:35:08.7415158Z">
        <n1:v>12754</n1:v>
      </hv>
      <hv ts="2018-11-05T11:40:04.0077949Z" gt="2018-11-05T17:25:03.4285643Z">
        <n1:v>12754</n1:v>
      </hv>
      <hv ts="2018-11-05T17:28:03.4133447Z" gt="2018-11-05T19:40:03.0246122Z">
        <n1:v>12755</n1:v>
      </hv>
      <hv ts="2018-11-05T19:43:03.6499981Z" gt="2018-11-05T22:01:03.2620552Z">
        <n1:v>12756</n1:v>
      </hv>
      <hv ts="2018-11-05T22:04:03.1530787Z" gt="2018-11-06T02:37:03.454926Z">
        <n1:v>12757</n1:v>
      </hv>
      <hv ts="2018-11-06T02:40:03.61157Z" gt="2018-11-06T04:52:03.1759539Z">
        <n1:v>12758</n1:v>
      </hv>
      <hv ts="2018-11-06T04:55:03.14511Z" gt="2018-11-06T06:40:03.8621601Z">
        <n1:v>12759</n1:v>
      </hv>
      <hv ts="2018-11-06T06:43:03.2063072Z" gt="2018-11-06T08:55:03.3019409Z">
        <n1:v>12760</n1:v>
      </hv>
      <hv ts="2018-11-06T08:58:03.083875Z" gt="2018-11-06T09:10:03.0695797Z">
        <n1:v>12761</n1:v>
      </hv>
      <hv ts="2018-11-06T09:13:03.5389214Z" gt="2018-11-06T09:19:03.5238805Z">
        <n1:v>12761</n1:v>
      </hv>
      <hv ts="2018-11-06T09:22:03.9461503Z">
        <n1:v>12761</n1:v>
      </hv>
    </vals>
  </hist>
</getHistoryResult>

api/set/history

Request

  • URL: /api/set/history?format=xml
  • Method: POST
  • Content-Type: text/xml

Atribut i nastavuje interval (ISO 8601), v jakém by měla být uložena následující hodnota.

V cred lze použít i ověření pomocí jména a hesla, ale využití tokenu nabízí vyšší výkon.

Všechny časové údaje jsou očekávány v UTC. 

<?xml version="1.0" encoding="UTF-8"?>
<setHistoryRequest xmlns="http://dev.rcware.eu/scada/history" 
xmlns:n2="http://dev.rcware.eu/auth" 
xmlns:n1="http://dev.rcware.eu/scada/basic-props" 
projId="5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0" 
dpId="e86dba6d-1250-4e7f-aafb-84fd28324710">
  <n2:cred t="xxxxx"/><!-- token should be used here -->
  <vals>
    <hv ts="2020-03-15T11:00:00+00:00" i="P1D">
      <n1:v>2.7</n1:v>
    </hv>
    <hv ts="2020-03-16T11:00:00+00:00" i="P1D">
      <n1:v>3.0</n1:v>
    </hv>
    <hv ts="2020-03-17T11:00:00+00:00" i="P1D">
      <n1:v>2.0</n1:v>
    </hv>
    <hv ts="2020-03-18T11:00:00+00:00" i="P1D">
      <n1:v>2.3</n1:v>
    </hv>
  </vals>
</setHistoryRequest>

Response

  • 200 OK

api/set/executeActions

Request

  • URL: /api/set/executeActions?format=xml
  • Method: POST
  • Content-Type: text/xml
<?xml version="1.0" encoding="UTF-8"?>
<executeActionsRequest xmlns="http://dev.rcware.eu/scada/action-defs" 
xmlns:n2="http://dev.rcware.eu/scada/basic-props" 
xmlns:n1="http://dev.rcware.eu/auth" 
xmlns:r="http://dev.rcware.eu/serialization/references">
  <n1:cred t="xxxxx"/> <!-- token -->
  <actionDefs projId="5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0">
    <actions>
      <actionDefItem propName="INIT" dpId="afc22e18-f8e4-4e08-899c-fb9e4759df3d">
        <execParam r:type="495c9644-eed1-4b94-933b-3fae702a9aca">
          <n2:value>16</n2:value>
        </execParam>
      </actionDefItem>
      <actionDefItem propName="ZAP" dpId="34306c80-73f1-4465-ab51-2b2c1e85ab70">
      </actionDefItem>
    </actions>
  </actionDefs>
</executeActionsRequest>

Response 

<?xml version="1.0" encoding="utf-8"?>
<executeActionsResponse xmlns:r="http://dev.rcware.eu/serialization/references" code="Ok" message="OK" xmlns="http://dev.rcware.eu/scada/error-reporting" />

api/get/values

Nejvhodnější způsob vyčtení aktuálních hodnot datových bodů (property „Output“) z jednoho nebo více projektů.

Request

  • URL: /api/get/values?format=xml
  • Method: POST
{
 "cred": {
  "t": "xxxxxx" //token
 },
 "propNamesToSerialize": ["Output"],
 "offset": 0,
 "count": 1000,
 "serverState": null,
 "dps": [{
   "projId": "ba1a92f7-f213-4a72-90e4-f7142b50274b",
   "dpIds": ["e089dde2-a097-4e0d-8012-c8cf3dc62694", "1089dde2-a097-4e0d-8012-c8cf3dc62696"]
  }
 ]
}

Response 

<?xml version="1.0" encoding="utf-8"?>
<values xmlns:r="http://dev.rcware.eu/serialization/references" nextOffset="-1" serverTime="2020-04-07T07:46:34.850422Z" xmlns:n1="http://dev.rcware.eu/scada/basic-props" xmlns="http://dev.rcware.eu/scada/datapoints">
 <vals>
  <v projId="ba1a92f7-f213-4a72-90e4-f7142b50274b" dataVersion="637217783110000000" serverTime="2020-04-07T07:46:34.850422Z">
   <dps>
    <d id="e089dde2-a097-4e0d-8012-c8cf3dc62694" serAlr="true">
     <props>
      <p n="Output" t="2020-04-07T07:43:42.1000676Z" q="Bad" r:type="177e726a-3180-4152-bef2-6254e7055e1f">
       <n1:v>ON</n1:v>
      </p>
     </props>
    </d>
    <d id="1089dde2-a097-4e0d-8012-c8cf3dc62696" serAlr="true">
     <props>
      <p n="Output" t="2020-04-07T07:45:00.2408399Z" q="Good" r:type="b133774d-21ce-42b6-add3-57c012079c55">
       <n1:v>0</n1:v>
      </p>
     </props>
    </d>
   </dps>
  </v>
 </vals>
</values>
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