DataLogPro
In DataLogPro, you can drag multiple tags for logging, and specify log properties per tag or per group. By default, data logging starts automatically without having to trigger it by command. A log group or an individual tag can be configured to start logging periodically, on change, or on demand. You can drag an individual tag into a log group and that tag inherits the log properties of that group. The configuration of tags and groups can be exported and imported for batch editing.
The logged data is stored in a built-in InfluxDB or an external InfluxDB. The built-in
InfluxDB comes pre-installed, and DataLogPro's historical data is stored in it by
default. The external InfluxDB refers to an existing InfluxDB that you may want to use for
storing DataLogPro's historical data. To use an external InfluxDB, make sure to create a
database connection in
FactoryTalk View Studio > System > Connections >
Databases
. You can view the data in data grid, TrendPro, or XY Plot objects, or use
third-party tools to analyze and create reports from the data.Automatic switch to built-in InfluxDB if external InfluxDB disconnected
- If the HMI server loses connection to the external InfluxDB, it starts logging data to the built-in InfluxDB. The built-in InfluxDB uses the same storage duration as the external InfluxDB. Once the connection to the external InfluxDB is restored, all the data logged to the built-in InfluxDB will be synchronized to the external InfluxDB.
HMI server redundancy support
DataLogPro supports HMI server redundancy that helps prevent data loss.
- Using built-in InfluxDB onlyIn a redundant pair of HMI servers, DataLogPro logs data in both active and standby servers. If one server is disconnected, DataLogPro still logs data on that server as long as the DataLogPro service still runs. Only if the DataLogPro service stops, it stops logging data on that server. Once the DataLogPro service starts again, the data that is missing during that period is automatically synchronized between the two servers.
- Using external InfluxDBIn a redundant pair of HMI servers, DataLogPro on the active server logs data to the external InfluxDB while DataLogPro on the standby server logs data to the built-in InfluxDB. The data logged in the built-in InfluxDB by the standby server provides a one-minute cache of data. This cache supplements any missing data during the brief period of a switchover.
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