PLC return values

The error output of all PLC function blocks of the Tc3_Database.compiled library takes place via the I_TcResultEvent interfaces from the Tc3_Eventlogger.compiled library. This new interface structure enables a more detailed description of events, as well as classification.

Interface I_TcMessage
    nEventId: UDINT;
    EventClass: GUID;
    eSeverity: TcEventSeverity;
    ipSourceInfo: I_TcSourceInfo;

nEventID: Specific event code

EventClass: GUID

EventClassName: The corresponding event class name can be read using the RequestEventClassName method

eSeverity: Event classification: from "Info" to "Critical error"

ipSourceInfo: Path to the event location.

Text: Description of the event in plain text can be read with the RequestEventText method

The following event classes can occur:

• TC3 ADS Error
  ADS errors that may occur during the communication with the TwinCAT Database Server.
• TC3 Database Server Internal Error
  Internal errors that may occur if the TwinCAT Database Server is configured incorrectly.
• TC3 Database Server Database Error
  Database errors that may occur during communication with the corresponding databases. The different database-specific error codes are mapped in a database error list. The database-specific codes are written into the ErrorLog, as required.
• TC3 Database Server ADS Device Error
  ADS error that may occur during internal communication with configured ADS devices.
• TC3 Database Server NoSQL Error
  Database error of a NoSQL database that occurred during communication with the corresponding databases.