The following objects are directly related to the history API.
The float history object has the following properties.
| Property | Type | Description |
|---|---|---|
| clock | timestamp | Time when that value was received. |
| itemid | string | ID of the related item. |
| ns | integer | Nanoseconds when the value was received. |
| value | float | Received value. |
The integer history object has the following properties.
| Property | Type | Description |
|---|---|---|
| clock | timestamp | Time when that value was received. |
| itemid | string | ID of the related item. |
| ns | integer | Nanoseconds when the value was received. |
| value | integer | Received value. |
The string history object has the following properties.
| Property | Type | Description |
|---|---|---|
| clock | timestamp | Time when that value was received. |
| itemid | string | ID of the related item. |
| ns | integer | Nanoseconds when the value was received. |
| value | string | Received value. |
The text history object has the following properties.
| Property | Type | Description |
|---|---|---|
| id | string | ID of the history entry. |
| clock | timestamp | Time when that value was received. |
| itemid | string | ID of the related item. |
| ns | integer | Nanoseconds when the value was received. |
| value | text | Received value. |
The log history object has the following properties.
| Property | Type | Description |
|---|---|---|
| id | string | ID of the history entry. |
| clock | timestamp | Time when that value was received. |
| itemid | string | ID of the related item. |
| logeventid | integer | Windows event log entry ID. |
| ns | integer | Nanoseconds when the value was received. |
| severity | integer | Windows event log entry level. |
| source | string | Windows event log entry source. |
| timestamp | timestamp | Windows event log entry time. |
| value | text | Received value. |