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.
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. true enables a system user to use the Live Updates (play) button in History views to poll for live data for the associated imported history(ies). false renders this button unavailable in history views for the associated imported history(ies). |
| 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. |