Data Logging

The Visual T&D data log is a true historian and is designed to provide a complete record of all substation data, alarms and events:

• Log all events and alarms
• Log all transitions, on all data points, analog and binary
• Log all tag operations
• Disable logging of selected data points
• Use individually configurable deadbands to limit the amount of recorded data
• Field-proven performance with up to 100K data points and up to 10K sustained transitions per second
• Supports millisecond timestamping and data quality
• Supports out-of-sequence data

Historical Trends

Use the Historical Chart View to display the historical trend for any data point:

• Select standard time frames such as "Yesterday" or "This week", or specify your own
• Use the Zoom function and measurement cursors to analyze the selected time range
• Export selected data to a text file for analysis

Alarm and Event History

Use the Query View to display historical lists of alarms and events:

• Select standard time frames such as "Yesterday", "This week", or specify your own
• Select standard queries such as "All events today", "All alarms today", or build your own query using the Historical Query Wizard

Reports

Use the built-in report generator to create historical reports for selected data points.

Use the report generator to:

• Select among analog readings or transitions on binary data points
• Select the sampling period—seconds, minutes, or hours
• Select the time frame
• Print a report or export data in a variety of formats
• Use the built-in templates, or create your own with industry-standard Crystal Reports
• Excel add-into access real-time or historical data
• Automatic report generation, event triggered or scheduled