Page History

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• Name
  
  • The name of the History Store.
• Enabled
  
  • Checkbox to enable/disable the History Store. Not selected by default.
• Type
  • The type of History Store.
• Edge Node Tag Capacity
  • The maximum Maximum number of Edge Node level tag change events to store , from tags directly at the edge node level, before dropping the oldest stored tag change event for that edge nodeper Edge Node before dropping oldest historical Edge Node tag change events. This value is independent of the 'Device Tag Capacity' and only applies to how many 'Edge Node level' tag change events are stored per Edge Node.
  • A tag change event is triggered by either a change in value or quality and results in the tag's Qualified Value (which has three attributes of value, quality and timestamp) being stored. This parameter is independent from the Device Tag Capacity
• Device Tag Capacity
  
  • The maximum Maximum number of Device tag change events to store , for each device, before dropping the oldest stored tag change event for that deviceper Device before dropping oldest historical Device tag change events. This value is independent of the 'Edge Node Tag Capacity' and only applies to how many 'Device level' tag change events are stored per Device.
  • A tag change event is triggered by either a change in value or quality and results in the tag's Qualified Value (which has three attributes of value, quality and timestamp) being stored.This parameter is independent from the Edge Node Tag Capacity
• Flush Quantity
  • The maximum number of tags to publish in a single message upon reestablishing communication.
• Flush Period
  • The period to wait in milliseconds between publishes when flushing messages upon reestablishing communication

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