Read-only and read-write interface

We provide both read-only and read-write options of many interfaces. Due to the inherent security risks associated with writing to the data source, we recommend using the read-only option when possible.

• If you do not need to write to the data source, select the read-only version of the interface. For more information about the read-only version of the interface, or if you are migrating from a read-write version to a read-only version and want to view the migration procedure, refer to the Read-only versus read-write FAQ. If a read-only version is not available, disable interface updates to the data source. For more information, refer to the Disable read-write interface updates to the data source section in this document.

• If you need to write to the data source, select the read-write version of the interface and secure your points in the following ways:

  • Create an output point whitelist file that is secured so that only authorized users can change it. For more information, refer to the PI Universal Interface (UniInt) Framework User Guide.

Isolate output points using a separate interface instance from the input point interface instance.