Tuning Policy (Json Schema Tuning Policy)
Figure 32. Tuning Policy properties
To access these properties, expand and double–click Tuning Policy.
NOTE: Clicking overrides all tuning policy settings. Export markers applied to numeric points also have a
CoV Tolerance property, which you can use to throttle output.| Property | Value | Description |
|---|---|---|
| Min Write Time | hours minutes seconds | Specifies the minimum amount of time allowed between schema generation, so that, for example, hundreds of concurrent CoV changes
over a short time do not result in a deluge of JSON messages.
The default value of zero (0) disables this rule causing all value changes to attempt to generate. |
| Max Write Time | hours minutes seconds | If nothing else triggers a generate, this property specifies the maximum amount of time to wait before regenerating. Any generation
action resets this timer.
The default value of zero (0) disables this rule resulting in no timed generation. |
| Write On Start | true (default) or false |
Determines schema behaviour when a station starts.
If If |
| Write On Enabled | true or false (default)
|
Determines schema behaviour when a status transitions from disabled to normal (enabled).
If If |
| Update Strategy | drop-down list | Manages the control strategy in the station.
|