3.16.3.3. AVEVA Historian
From the Edit Historian Connection window you can select AVEVA Historian.
Connection Settings
- Label
A unique text string used to identify this connection. This label is used to identify the connection when configuring store and forward, and to create the database name or retention policy in some historians. The label can contain only letters, numbers and the underscore (
_) character.- Server host name
The computer name or IP address for the machine running the AVEVA Historian.
- Server TCP port
The TCP port for connecting to the AVEVA Historian.
- User name
The user name for the AVEVA Historian account.
- Password
The password associated with the User name.
- Accumulation time (ms)
The number of milliseconds that the DataHub instance will buffer data in memory before sending it to AVEVA Historian. Leaving this field blank means that data will be sent as soon as it is available. Accumulating data before transmission will improve network performance but will add latency.
If both this value and Maximum # of buffered values (below) are specified, then the DataHub instance will write all buffered values to AVEVA Historian whenever the first of these two limits is reached.
- Maximum # of buffered values
The maximum number of values that the DataHub instance will buffer in memory before transmitting them to AVEVA Historian. Setting this value to zero will allow any number of values to be buffered within the accumulation time.
- Read-only - do not write to database
Prevents the DataHub instance from writing to AVEVA Historian.
- Log writes at information level
Checking this option causes messages regarding successful writes to the database to be logged at the level in the DataHub Event Log. If this is not checked then these messages are logged at the level and are therefore normally hidden from the user.
Storage Settings
The DataHub program uses the AVEVA Historian store-and-forward agent when writing to AVEVA Historian. These settings refer to the configuration of that agent and are documented in more detail in the AVEVA Historian documentation.
- Transmission type
The AVEVA Historian transmission type for the forwarded data. Select either or .
- Storage Type
The type of storage on AVEVA Historian. Normally this should be set to .
- Min store and forward duration (minutes)
The minimum length of time that data will be saved in the store-and-forward queue while waiting to be transmitted. Data that cannot be transmitted within this time may be discarded.
- Store and forward free disk space (MB)
The minimum amount of free space that must be available on disk for store-and-forward to keep data. If the free disk space drops below this number then stored data will be discarded without transmission.
- Store and forward path
The path where data will be stored by the store-and-forward mechanism prior to transmission.
Modify Point Names, Data Sampling and Forwarding
Please see Modify Point Names, Data Sampling or Forwarding in Connection Configuration for how to configure these options.
Once you have completed the AVEVA Historian-specific configuration, you can return to Picking Points in General Options to continue.