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 number of tag change events to store (per , for each edge node ) folder, before dropping the oldest stored tag change event.
  • 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. 
  • The Edge Node Tag Capacity is independent from, and in addition to, the Device Tag Capacity
• Device Tag Capacity
  
  • The maximum number of tag change events to store (per device) , for each device folder, before dropping the oldest stored tag change event.
  • 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.
• 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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