driver-HistoryPollScheduler
This component (On Demand Poll Scheduler) specifies the available network-level polling rates for imported histories, which the station uses in on-demand polling
of an imported history. Clicking the Live Updates button on a History Chart or History Table view triggers such polling.
Figure 41. History Network Ext properties
To display these properties, expand , right-click the NiagaraNetwork, click , expand History Policies and double-click On Demand Poll Scheduler.
| Property | Value | Description |
|---|---|---|
| Poll Enabled | true (default) false |
Enables and disables polling.
|
| Fast Rate | hours minutes seconds (defaults to 10 seconds) | Sets the target polling interval for devices that can be polled (they are pollable) and assigned to the Fast Rate group. |
| Normal Rate | hours minutes seconds (defaults to 45 seconds) | Sets the target polling interval for devices that can be polled (they are pollable) and assigned to the Fast Rate group. |
| Slow Rate | hours minutes seconds (defaults to two minutes) | Sets the target polling interval for devices that can be polled (they are pollable) and assigned to the Fast Rate group. |
| Statistics Start | read-only | Reports the last time statistics were reset. |
| Average Poll | read-only | Reports the average time spent in each poll. |
| Busy Time | read-only | Reports the percentage of the time that the station was busy doing polls. |
| Total Polls | number of polls over the number of milliseconds | Reports the total number of polls conducted and the time spent waiting for polls to execute. |
| Dlbs Polls | read-only | Reports the current and average number of components in the DIBS stack. (DIBS stands for Distributed Internet Backup System). |
| Fast Polls | read-only | Reports the total number of polls made processing the fast queue. |
| Normal Polls | read-only | Reports the total number of polls made processing the normal queue. |
| Slow Polls | read-only | Reports the total number of polls made processing the slow queue. |
| Dlbs Counts | read-only | Reports the percentage and ratio of the number of DIBS polls versus total polls made processing the dibs stack. |
| Fast Count | read-only | Reports the current and average number of components in the fast queue. |
| Normal Count | read-only | Reports the current and average number of components in the normal queue. |
| Slow Count | read-only | Reports the current and average number of components in the slow queue. |
| Fast Cycle Time | read-only | Reports the average cycle time for the fast queue. |
| Normal Cycle Time | read-only | Reports the average cycle time for the normal queue. |
| Slow Cycle Time | read-only | Reports the average cycle time for the slow queue. |