Communication of Application Messages

This section describes how Substation ES communicates with applications that use communication fields and notifications.

• Communication Fields
  Communication fields are named fields within a user message that assist in bidirectional Substation ES communication. These fields enhance the ability of an application to effectively forward additional information and receive notifications when conversing with Substation ES.
• System Fields
  System fields are not always used. When they are used, they are either in the user message or as message properties. To ensure that the contents of the fields are correctly processed and relayed to the participating interfaces by Substation ES, depending on the direction of the conversation, specify certain system fields in the definition of the configuration message.
• User Fields
  User fields are only provided if you select the appropriate Reply Method on the Recipe or Trigger Definition panel. When in use, the fields are in the user message and the Substation ES error message tibss-error-msg.
• Application Notifications
  Substation ES Application Notification provides information to applications regarding possible abnormal conditions, such as data transformation errors, possible Substation ES runtime failures and errors or failures that occur during the processing of applications requests.

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