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Prerequisites

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The prerequisites listed here are shown as examples for an S7-1500 Controller from TIA V15 and FW2.5.

  • A license for OPC UA must be available and activated on the application program.
  • The OPC UA server must be activated on the application program.
  • A program block must be created in which following variables are defined:
    • Command variable (trigger variable) of data type Int16: The variable must be able to be read by the versiondog server.
    • Status variable (variable for acknowledgement) of data type Int16: The variable must be writable by the versiondog server.
  • To restrict access to the OPC UA server, a user with appropriate rights to the variables should be created.
  • Access to the variables via OPC UA must be possible. Check that the corresponding checkboxes are activated, and test the connection to the OPC UA server via a freely available OPC client tool, for example.

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