OPC Test Tool

Use to test local and remote OPC-DA, OPC-HDA, and OPC A&E Servers

OPC-DA: Data Access
OPC-HDA: Historical Data Access
OPC-A&E: Alarms and Events

If connection issues are a problem, download this tool and then see our OPC Connection Issues page!

Functions include:

• OPC-DA, OPC-HDA, OPC-A&E
  Connection test (local and remote OPC Servers)
• OPC-DA
  Tag/item browsing and tag properties
  Read current tag/item values, qualities, and timestamps (Cache or Device read)
  Write tag/item values
• OPD-HDA
  Read historical tag/item values, qualities, and timestamps (raw, at time, before/after time)
  Read aggregate values (average, min, max, …)
• OPC-A&E
  Create subscriptions with filters. View and store subscription events.
  Visit our OPC A&E information and resources page

This tool is Free!

Screen shots

OPC-DA/HDA

Item browsing

Values and Aggregates

OPC Alarms and Events

Subscription filter

Subscription viewer