OPC DA Server Commands

The following describes the commands available for the Desigo CC OPC DA server.

Property

Status

Commands

OPC Server DA Status

Desigo CC OPC DA server running conditions:

  • Not Running: The Desigo CC OPC DA server is stopped. The last third-party OPC client disconnects and the shutdown procedure completes successfully.
  • Loading Configuration: The Desigo CC OPC DA server starts loading the configuration after its initialization.
  • Running: The Desigo CC OPC DA server is running. The Desigo CC OPC DA server can run only:
    • if at least one third-party OPC client is connected to the Desigo CC OPC DA server, and its initialization has been completed.
    • Desigo CC OPC DA server is running and the configuration has been successfully loaded.
  • No License: The Desigo CC OPC DA server license is not available. This may happen during the initialization (such as, the OPC server is not licensed) or when verifying the OPC server running condition (such as, the license is unavailable). The Desigo CC OPC DA server terminates and a Status event is generated.
  • No Configuration: The OPC DA server node is not present in the project, or the OPC scope is missing in the project, or the OPC scope configuration is invalid (OPC scope not configured or not having items to be exposed). If the configuration is invalid. The Desigo CC OPC DA server terminates and a Status event is generated.
  • Failure: The Desigo CC OPC DA server executable file is not found or an expected error occurs (for example, while loading the configuration or while verifying Desigo CC OPC DA server running condition). The Desigo CC OPC DA server terminates and a Fault event is generated.
  • Invalid Configuration: The OPC scope configuration is invalid. A Status event is generated.
  • Empty Configuration: The configuration is valid but there are no OPC items to expose. The Desigo CC OPC DA server terminates.
  • Stop

This command is:

  • Disabled when the Desigo CC OPC DA server is not running or an operation is in progress.
  • Enabled only when the Desigo CC OPC DA server is running and lets you stop the Desigo CC OPC DA server, so that when it starts again, the latest configuration is loaded. For more details, see OPC Items Data Alignment.
    NOTE: As the generic OPC server does not support the cache clean up, it is not possible to automatically clean the current OPC configuration to retrieve the latest data (because of configuration changes).

Dismiss OPC Server on Startup

  • True
  • False
  • Enable
  • Disable

For more details, see Troubleshooting OPC DA Server Invalid State When the Project is Stopped.