What's new in QuickOPC 2021.3

See also: Versions; Previous version: What's new in QuickOPC 2021.1

Internal version number: 5.62

Key changes:

Targeting

• .NET Core 2.1 is no longer supported.

Component Improvements

• The ILicenseInfoProvider.LicenseInfo property now returns (specially marked) elements for licenses that has been considered but dropped during the license verification and evaluation. With licensing errors that result in a trial license being used, this allows the user to diagnose licensing problems sooner - before the run-time limit associated with the trial license is reached.

OPC UA Client-Server

• Added IEasyUAClient.ReadValue extension method overloads with index range list.
• Added IEasyUAClient.Read and IEasyUAClient.ReadValue extension method overloads with read parameters object (UAReadParameters). This allows shorter coding when e.g. maximum value age, or reading from the device needs to be specified.
• Operation monitoring: The arguments of the IEasyUAClient.ServerConditionChanged event, i.e. the EasyUAServerConditionChangedEvenArgs, now contain a Statistics property. This property contains a ConnectedConditionStatistics object, with large amount of information about the connection to the server. There is a sequential connection attempt count, and an AutomatonStateStatistics object for each of the connection states (Disconnected, Connecting, Connected, and Disconnecting), and for an "Unconnected" state, which represents a state other than Connected. For each of these states, you can obtain information such as how many time it was entered, when it was first entered, when the last cycle started and how long it did last, what is the minimum, maximum, and accumulated duration of the state, and much more. For the current state, you can also obtain information such as when it was entered and how long it is active.

OPC UA PubSub

• Delta frames in JSON message mapping are now supported.

Component Refactorings

• Elements returned from ILicenseInfoProvider.LicenseInfo that represent date/time or a timespan are now returned as a DateTime or TimeSpan, respectively, instead of just "raw" UInt64 or UInt32. This helps to interpret the commonly needed elements such as ReleaseDateCovered.

OPC Classic

• Improved error enhancement (details added to error texts in some common scenarios).

OPC UA

• Improved error enhancement (details added to error texts in some common scenarios).
• Errors from session connections and reconnections are now enhanced by connection attempt number, last connected time, and unconnected timespan.
• In transitions to the Connecting state, the string form of the EasyUAServerConditionChangedEventArgs now includes the sequential connection attempt number, allowing the user to easily assess whether the connection is "down" for an extended period of time.

Tools and Online Services

Demo Servers and Publishers

• The UADemoPublisher can now produce Delta frames in JSON message mapping (when KeyFrameCount >= 2).

OpcCmd Utility

• The uaClient command now has a new --ServerConditionChanged (-scc) option, which enables event notifications related to server condition changes (connecting/connected/disconnecting/disconnected).
• Added the --EndpointAnonymous|-ea <bool> option to various uaClient subcommands, allowing to explicitly enable/disable the use of anonymous user token.

OPC UA PubSub Formatter

• The OPC UA PubSub Formatter can now show the format of JSON Delta frames, Event messages, and Keep-Alive messages.

Examples

• Added a C# example that shows how to display all fields of the available license(s).

Platform: COM

• Added a VBA example in Microsoft Access. The example reads an OPC UA value and shows it on a form that opens automatically on database startup.
• Added a Delphi example showing how to use OPC Data Access event pull with multiple subscribed items.

OPC UA Client-Server

• Added C# examples showing how to read a single node or multiple nodes, specifying that the read should be performed from the device.
• Added example for server condition monitoring (IEasyUAClient.ServerConditionChanged event).

Documentation and Help

• Enhanced documentation related to OPC UA read parameters (setting maximum age, choosing to read from the cache or from the device, or setting the encoding name).
• Examples that were in the DocExamples and UADocExamples projects but were not in the User's Guide were added to the documentation.
• Fix: Added missing remarks to enum members.
• Fixed invalid links to enum members.