Each time an operator successfully signs for an action, a message is sent to the iFIX alarm system. You can view these messages in the Alarm History window, in the Alarm File, or on an alarm printer. The message contains the following:
- Timestamp for the action.
- Name of the SCADA node.
- Fully-qualified name of the data source being changed (for data entry actions only).
- New value (for data entry actions only).
- Operator's user name.
- Name of the tag whose alarm is acknowledged or deleted (for alarm acknowledgement and deletion actions only).
- User name of the verifier, if the tag requires verification.
Example 1: Electronic Signature Not Required
In this example, electronic signature is not required for the tag. This message is sent to the iFIX alarm system when an operator changes the value of the tag:
Example 2: Perform Only Signature Required
In this example, the tag requires a Perform Only signature. This message is sent to the iFIX alarm system when an operator changes the value of the tag and signs for it:
Example 3: Perform and Verify Signature Required
In this example, the tag requires both Perform and Verify signatures. This message is sent to the iFIX alarm system when an operator changes the value of the tag, signs for it, and a supervisor verifies the change:
