This import functionality is built on the Web API, and requires the following.
• The PI Web Server to be deployed and running.
• The PI Asset Framework must be installed and configured.
• The PI Web Server OSIsoft Message Format (OMF) protocol must be enabled.
• The PI Web Server’s search feature must be enabled.
PI Server data is typically machine generated and collected at defined intervals. The interval time can be short, leading to large amounts of data. For example, you have a process that is being monitored. Every 15 minutes, data is collected from various sensors and this data is sent to the PI Server. In another application, sensor readings can be collected more frequently, for example, every millisecond. The table below illustrates how this can lead to a large amount of data.
|
Number of sensors |
10 |
10 |
10 |
|
Data Collected Every Unit of Time |
15 |
1 |
1 |
|
Units of Time |
Minutes |
Seconds |
Milliseconds |
|
Units of Time per Day |
96 |
86,400 |
86,400,000 |
|
Data Points per Day |
960 |
864,000 |
864,000,000 |
|
Data Points per Month |
29,200 |
26,280,000 |
26,280,000,000 |
|
Data Points per Year |
350,400 |
315,360,000 |
315,360,000,000 |
The PI Server can import the following types of data:
• raw data
• plot data
• interpolated data