The Calculated Data API queries the calculated data for a list of tags. Data can be requested using a number of samples or a time range for a list of tags. If the count is not zero, the service returns the number of raw samples beginning from the start time. If the count is zero, the services uses the interval, start time, and end time to calculate the required sample number.
| METHOD: | GET, POST |
| URI: |
- GET
https://<historianservername>:8443/historian-rest-api/v1/datapoints/calculated/{tagNames}/{start}/{end}/{calculationMode}/{count}/{intervalMs}- POST
https://<historianservername>:8443/historian-rest-api/v1/datapoints/calculated/{start}/{end}/{calculationMode}/{count}/{intervalMs}
|
| SAMPLE GET URI: |
- Number of Samples
https://<historianservername>:8443/historian-rest-api/v1/datapoints/calculated/tagName1/2013-10-02T11:30:00.111Z/2013-10-02T11:31:11.111Z/1/100/1000- Time Range for List of Tags
https://<historianservername>:8443/historian-rest-api/v1/datapoints/calculated?tagNames=tagName1&start=2013-10-02T11:30:00.111Z&end=2013-10-02T11:31:11.111Z&count=100&calculationMode=1&intervalMs=1000
|
| SAMPLE POST URI: |
- Number of Samples
https://<historianservername>:8443/historian-rest-api/v1/datapoints/calculated/2013-10-02T11:30:00.111Z/2013-10-02T11:31:11.111Z/1/100/1000- Time Range for List of Tags
https://<historianservername>:8443/historian-rest-api/v1/datapoints/calculated?start=2013-10-02T11:30:00.111Z&end=2013-10-02T11:31:11.111Z&count=100&calculationMode=1&intervalMs=1000
|
| SAMPLE cURL COMMAND (GET): | curl -i -H "Accept: application/json" -H "Authorization: Bearer <TOKEN>http://<nodename>:8843/ historian-rest-api/v1/ datapoints/calculated/<tagName>/<start time>/<end time>/<count>/<calculation mode>/<intervalMS> |
| SAMPLE cURL COMMAND (POST): | curl -i X POST -H "Content-Type: application/json" -H "Accept: application/json" -H "Authorization: Bearer <TOKEN>-d {\tagNames\:\<tagName>\}http://<nodename>:8843/ historian-rest-api/v1/ datapoints/calculated/<start time>/<end time>/<count>/<calculationmode>/<intervalMS> |
Query Parameters
| Parameter | Description | Required? | Values |
|---|
| TagNames | GE identifier for a location. | Yes | 1000000106 |
| Start | Start time of the query, in ISO data format (such as YYYY-MM-DDTHH:mm:ss.SSSZ). | Yes | DateTime |
| End | End time of the query, in ISO data format (such as YYYY-MM-DDTHH:mm:ss.SSSZ). | Yes | DateTime |
| Count | Count of archive values within each calculation interval. | Yes | Integer, with a value such as 100. |
| Calculation Mode | End time in milliseconds. | Yes | Integer, with a value such as 1. |
| IntervalMS | Interval in milliseconds. | | 64-bit signed integer, with a value such as 1000. |
Response Parameters
| Parameter | Data Type | Required? | Description |
|---|
| ErrorCode | Integer | Yes | For example, 0. |
| ErrorCode | String | Yes | For example, NULL. |
| Data | String | Yes | The object container for the following parameters:- DataType
- DoubleFloat, which stores decimal values up to 15 places.
- ErrorCode
- Value is 0, which means the operation was successful.
- TagName
- Example is TagName1.
- Samples
- Provides TimeStamp, Value and Quality for each sample. For example, TimeStamp = 2013-10-02T11:30:00.111Z, Value = 34.26155, and Quality = 3.
|
Sample Response
{
"ErrorCode" : 0,
"ErrorMessage": null,
"Data":[{
"DataType":"DoubleFloat",
"ErrorCode":0,
"TagName":"TagName1",
"Samples":[ { "TimeStamp":"2013-10-02T11:30:00.111Z","Value":"34.26155","Quality":3 },
{ "TimeStamp":"2013-10-02T11:30:10.111Z", "Value":"37.26155", "Quality":3 },
{ "TimeStamp":"2013-10-02T11:31:00.111Z", "Value":"33.26155", "Quality":3 }
]
}]
}