OT Connect Protocol Adapters
GE Historian
The GE Historian protocol adapter can connect to Proficy Historian 4.0 and later, through the Client Access API. This allows OT Connect to support Proficy Historian without an intervening OPC server. GE Historian protocol adapter requires the Client Access Assembly to be installed on the OT Connect Process Data server.
The Client Access API offers improved security, performance, and reliability. Therefore, it is recommended to use the GE Historian protocol adapter to connect to the Proficy Historian servers.
- LastReading
- SubscribeReadings
- GetStartEndReadings
- GetBeforeEndReadings
Configure the GE Historian Protocol Adapter
- Install Historian Client Tools with the Historian Client Access Assembly component. For information on installing Historian Client Tools, refer to the GE Digital Historian documentation.Note:
- When installing Historian Client Tools, install the Historian Client Access Assembly component only.
- Historian Data Archiver can be installed on another server.
- Configure the OT Source.
Host Name | Hostname or the FQDN of the target server. The host name must exactly match with the name that was provided when installing the target Historian. |
User Name | Windows user with iH Readers membership on the Process Historian server. |
Password | Windows password. |
OSI PI
The OSI PI protocol adapter can connect to PI Server 2010 and later, using the Asset Framework (AF) protocol. This allows OT Connect to support PI without an intervening OPC server. OSI PI protocol adapter requires the PI AF Client to be installed on the OT Connect Process Data server. The AF protocol offers improved security, performance, and reliability. Therefore, it is recommended to use this adapter to connect to the OSI PI servers.
- LastReading
- SubscribeReadings
- GetStartEndReadings
- GetBeforeEndReadings
Configure the OSI PI Protocol Adapter
- Install PI AF Client. For information on installing the PI AF client, refer to the OSIsoft documentation.
- Configure the OT Source.
Host Name | Hostname or the FQDN of the target server. The host name must exactly match with the name that is configured in the System Explorer. |
User Name | Windows user configured with a PI mapping. |
Password | Windows password. |
OPC DA
The OPC DA protocol adapter can connect to OPC Classic DA 3.0 servers.
- The OPC DA protocol adapter does not support remote connections. The OPC DA server must be installed on the OT Connect Process Data server, running under the same user account as the Adapter service.
- Only OPC 3.0 servers are supported by OT Connect.
Vendors of the Process Historian software may have implemented different elements of the specification. Therefore, it is important to review the Connection Status or OT Source Capability Utility report to understand the Capabilities available from the server that you want to integrate with GE Digital APM.
The most common limitation for OPC DA protocol adapter is properties, such as Description or RawUom not being available for Tag Sync. If these properties are not available, you will get only Tag Name and Data Type.
- LastReading
- SubscribeReadings
Protocol Connection
The OPC DA protocol adapter requires the ProgId to be configured.
If the correct ProgId is not provided, the protocol adapter will log an exception report on all available OPC DA ProgIds in the server on startup.