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Tags must have write permission enabled. Tag write permissions can applied to the entire tag provider or on individual tags to guarantee the write security.
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Tag writes using the security context can be configured to create an Ignition audit log record following the steps below:
- Create a Database Audit Profile
- On the MQTT Transmission General tab, set the Audit Profile parameter to your database audit profile
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Use any of the standard Ignition ways to view the the Audit Log System. The image below shows the records through the Database Query Browser and the fields are populated as:
| Name | Description of value |
|---|---|
| EVENT_TIMESTAMP | The timestamp that the tag write using the security context was performed in the format YYYY-MM-DD HH:MM:SS:mmm |
| ACTOR | For Set to "unknown" (Ignition 8.1.33 or lower - Currently not used - set as "unknown") Set to username (For Ignition 8.1.34 or higher - Set to usernameand MQTT Engine 4.0.20 or higher) |
| ACTOR_HOST | The originating host system gateway name |
| ACTION | Set as "tag write" |
| ACTION_TARGET | The tag path for the tag that is being written to |
| ACTION_VALUE | The Qualified Value (value, quality, timestamp) for the tag write |
| STATUS_CODE | Currently not used - set as "0" |
| ORIGINATING_SYSTEM | The system generating the audit record - set as "MQTT Transmission:DCMD Write" |
| ORIGINATING_CONTEXT | Currently not used - set as "0" |
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