driver-TuningPolicy
This component configures the NiagaraNetwork’s timing of write requests (for example, writable proxy points) and the acceptable freshness of read requests. Also, can
associate with one of 3 Poll Rates in the network’s Poll Service.
You can create multiple tuning policies under a driver’s TuningPolicyMap. You can then assign one or more proxy points to a specific TuningPolicy.
Figure 43. Tuning Policy Properties
| Property | Value | Description |
|---|---|---|
| Default Policy | additional properties | Specifies additional parameters to be configured. |
| Stale Time | hours minutes seconds (defaults to 0 seconds) | Defines the period of time without a successful read (indicated by a read status of {ok}) after which a point’s value is considered
to be too old to be meaningful (stale).
A non-zero value causes the point to become stale (status stale) if the configured time elapses without a successful read, indicated by Read Status {ok}. The default value (zero) disables the stale timer causing points to become stale immediately when unsubscribed. |
| Min Update Time | hours minutes seconds (defaults to 01 seconds) | Defines the minimum amount of time between the updates sent by the server to the client. |
| Max Update Time | hours minutes seconds (defaults to 15 minutes) | Defines the maximum amount of time used by the server to resend the values to the client for subscribed points. |