Applies to:
snapshot
Snapshot Service
The Snapshot service is used to fetch tag data from a process historian. i.e. MOPS Historian.
Properties
| Property Name |
Description |
| Name |
Identity of the component |
| Mode |
Able to retain multiple tags or just the latest |
Actions
Fetch Tag
| Name |
Description |
| Tag Name |
Identifier to tag in the historian db |
| Start Time |
Start time for period of data to fetch |
| End Time |
End time for period of data to fetch |
| Status |
Specify the values to be returned that DO NOT have the specified statuses |
| Elements |
A comma-separated list of elements to retrieve for profile tags. If no value given, all elements will be fetched. |
| Schedule |
Schedule updates (OPC Expression; S, M H) |
| Automatic Updates |
Enable or disable automatic updates |
Events
| Name |
Description |
Event Information |
| Fetched |
Data Loaded |
tagName - The name of the tag fetched |
Output Data
| Name |
Description |
| value |
The value of the input field in the text field |
Value Data
| Name |
Description |
| source |
The source of the tag |
| name |
Name of the tag |
| description |
The description of the tag |
| egu |
Engineering unit |
| datatype |
Historian data type |
| group |
Historian data group |
| trended |
TRue if tag is trended |
| attributes |
The attributes of the tag |
| data |
Data points of the tag |
| topic |
The topic used for Event Broker |
