Limitations of PI to CONNECT

Restrictions for PI point transfers

• Point must belong to the classic or base point class.

• Point type must be Float16, Float32, Float64, Int16, Int32, Digital, Timestamp, or String.

PI to CONNECT Agent registration

• Multiple PI to CONNECT Agents can connect to and transfer data from the same Data Archive if the agents are installed on different machines and assigned to different namespaces. Only one agent can be installed on each computer.

Data Archive

• PI to CONNECT does not write events back to Data Archive from CONNECT data services.

SDS streams indexes

• Does not support multiple values at a given index.

• If a Data Archive tag has multiple values at a given timestamp, CONNECT data services will store the first value returned.

Custom UOM data

• Custom units of measure (UOMs) that are not one of the predefined UOM classes in CONNECT data services are not supported. During the transfer of AF element data, AF elements with custom UOMs will not have their corresponding asset's UOM property set.

PI Analysis Service

• If you use PI to CONNECT with the PI Analysis Service, be sure to save analysis outputs to PI points.

Multiple UOMs

• If multiple attributes reference the same PI point but have different UOMs, a stream UOM is not transferred.

AF data limitations

• For limitations on the transfer of AF data, see AF data that can be transferred.

Workgroups not supported

• PI to CONNECT is only supported in domain environments. While there may be methods to enable the use of PI to CONNECT in a workgroup environment, the long-term supported solution is to run PI to CONNECT in a domain environment.